679 lines
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679 lines
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<li class="navelem"><a class="el" href="namespacefaiss.html">faiss</a></li><li class="navelem"><a class="el" href="structfaiss_1_1IndexIVFPQ.html">IndexIVFPQ</a></li> </ul>
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<a href="#pub-methods">Public Member Functions</a> |
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<div class="title">faiss::IndexIVFPQ Struct Reference</div> </div>
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<p><code>#include <<a class="el" href="IndexIVFPQ_8h_source.html">IndexIVFPQ.h</a>></code></p>
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Inheritance diagram for faiss::IndexIVFPQ:</div>
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<table class="memberdecls">
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Public Member Functions</h2></td></tr>
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<tr class="memitem:a38e177f44798228fe81a0c35b86080fc"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a38e177f44798228fe81a0c35b86080fc"></a>
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 </td><td class="memItemRight" valign="bottom"><b>IndexIVFPQ</b> (<a class="el" href="structfaiss_1_1Index.html">Index</a> *<a class="el" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>, size_t <a class="el" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, size_t <a class="el" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>, size_t M, size_t nbits_per_idx)</td></tr>
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<tr class="separator:a38e177f44798228fe81a0c35b86080fc"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a981c2748bfbd9b018494f119279a0342"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a981c2748bfbd9b018494f119279a0342"></a>
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void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a981c2748bfbd9b018494f119279a0342">add_with_ids</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x, const long *xids=nullptr) override</td></tr>
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<tr class="memdesc:a981c2748bfbd9b018494f119279a0342"><td class="mdescLeft"> </td><td class="mdescRight">default implementation that calls encode_vectors <br/></td></tr>
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<tr class="separator:a981c2748bfbd9b018494f119279a0342"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aaeddd125680a8d5347c0b58565b6b511"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#aaeddd125680a8d5347c0b58565b6b511">encode_vectors</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x, const <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *list_nos, uint8_t *codes) const override</td></tr>
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<tr class="separator:aaeddd125680a8d5347c0b58565b6b511"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ac0cb8421b9885d691696d2ff4f76894b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#ac0cb8421b9885d691696d2ff4f76894b">add_core_o</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x, const long *xids, float *residuals_2, const long *precomputed_idx=nullptr)</td></tr>
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<tr class="separator:ac0cb8421b9885d691696d2ff4f76894b"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:af6565a5d8bab7be3df19c50d235bd662"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="af6565a5d8bab7be3df19c50d235bd662"></a>
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void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#af6565a5d8bab7be3df19c50d235bd662">train_residual</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x) override</td></tr>
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<tr class="memdesc:af6565a5d8bab7be3df19c50d235bd662"><td class="mdescLeft"> </td><td class="mdescRight">trains the product quantizer <br/></td></tr>
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<tr class="separator:af6565a5d8bab7be3df19c50d235bd662"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a4e06f04853dcb424dc393de5f641e917"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a4e06f04853dcb424dc393de5f641e917"></a>
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void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a4e06f04853dcb424dc393de5f641e917">train_residual_o</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x, float *residuals_2)</td></tr>
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<tr class="memdesc:a4e06f04853dcb424dc393de5f641e917"><td class="mdescLeft"> </td><td class="mdescRight">same as train_residual, also output 2nd level residuals <br/></td></tr>
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<tr class="separator:a4e06f04853dcb424dc393de5f641e917"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a921c6640d3a16bb3608883d8e8948810"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a921c6640d3a16bb3608883d8e8948810">reconstruct_from_offset</a> (long list_no, long offset, float *recons) const override</td></tr>
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<tr class="separator:a921c6640d3a16bb3608883d8e8948810"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aee355b57acde203a3caed46a93e16a3c"><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#aee355b57acde203a3caed46a93e16a3c">find_duplicates</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *ids, size_t *lims) const </td></tr>
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<tr class="separator:aee355b57acde203a3caed46a93e16a3c"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aa26497bd5b44c5dbbebfe6bfe453119e"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aa26497bd5b44c5dbbebfe6bfe453119e"></a>
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void </td><td class="memItemRight" valign="bottom"><b>encode</b> (long key, const float *x, uint8_t *code) const </td></tr>
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<tr class="separator:aa26497bd5b44c5dbbebfe6bfe453119e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1ae6cdd996bbd398fa4e87646c8f3ba6"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a1ae6cdd996bbd398fa4e87646c8f3ba6">encode_multiple</a> (size_t n, long *keys, const float *x, uint8_t *codes, bool compute_keys=false) const </td></tr>
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<tr class="memitem:ae1fb0cc3051dec8e322a78c443f8fc9a"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ae1fb0cc3051dec8e322a78c443f8fc9a"></a>
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void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#ae1fb0cc3051dec8e322a78c443f8fc9a">decode_multiple</a> (size_t n, const long *keys, const uint8_t *xcodes, float *x) const </td></tr>
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<tr class="memdesc:ae1fb0cc3051dec8e322a78c443f8fc9a"><td class="mdescLeft"> </td><td class="mdescRight">inverse of encode_multiple <br/></td></tr>
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<tr class="separator:ae1fb0cc3051dec8e322a78c443f8fc9a"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a694b699dd3512d83743d717e489bd48c"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a694b699dd3512d83743d717e489bd48c"></a>
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<a class="el" href="structfaiss_1_1InvertedListScanner.html">InvertedListScanner</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a694b699dd3512d83743d717e489bd48c">get_InvertedListScanner</a> (bool store_pairs) const override</td></tr>
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<tr class="memdesc:a694b699dd3512d83743d717e489bd48c"><td class="mdescLeft"> </td><td class="mdescRight">get a scanner for this index (store_pairs means ignore labels) <br/></td></tr>
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<tr class="separator:a694b699dd3512d83743d717e489bd48c"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ad99c215aeaf92e995cb97f4044c4d267"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#ad99c215aeaf92e995cb97f4044c4d267">precompute_table</a> ()</td></tr>
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<tr class="memdesc:ad99c215aeaf92e995cb97f4044c4d267"><td class="mdescLeft"> </td><td class="mdescRight">build precomputed table <a href="#ad99c215aeaf92e995cb97f4044c4d267">More...</a><br/></td></tr>
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<tr class="separator:ad99c215aeaf92e995cb97f4044c4d267"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="inherit_header pub_methods_structfaiss_1_1IndexIVF"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_structfaiss_1_1IndexIVF')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a></td></tr>
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<tr class="memitem:a7077b7e60e250b9a84c49ff38205bbbf inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a7077b7e60e250b9a84c49ff38205bbbf">IndexIVF</a> (<a class="el" href="structfaiss_1_1Index.html">Index</a> *<a class="el" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>, size_t <a class="el" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, size_t <a class="el" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>, size_t <a class="el" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a>, <a class="el" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> metric=METRIC_L2)</td></tr>
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<tr class="memitem:a47a3b7665e9d2be41c6d3b2e9144b73f inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a47a3b7665e9d2be41c6d3b2e9144b73f"></a>
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void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">reset</a> () override</td></tr>
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<tr class="memdesc:a47a3b7665e9d2be41c6d3b2e9144b73f inherit pub_methods_structfaiss_1_1IndexIVF"><td class="mdescLeft"> </td><td class="mdescRight">removes all elements from the database. <br/></td></tr>
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<tr class="separator:a47a3b7665e9d2be41c6d3b2e9144b73f inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a7a1d5eec194db0977b2318c6ed6a2b86 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7a1d5eec194db0977b2318c6ed6a2b86"></a>
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void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a7a1d5eec194db0977b2318c6ed6a2b86">train</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x) override</td></tr>
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<tr class="memdesc:a7a1d5eec194db0977b2318c6ed6a2b86 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="mdescLeft"> </td><td class="mdescRight">Trains the quantizer and calls train_residual to train sub-quantizers. <br/></td></tr>
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<tr class="separator:a7a1d5eec194db0977b2318c6ed6a2b86 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a821002a9d3a1a74dc8d6f6072eca4075 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a821002a9d3a1a74dc8d6f6072eca4075"></a>
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void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a821002a9d3a1a74dc8d6f6072eca4075">add</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x) override</td></tr>
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<tr class="memdesc:a821002a9d3a1a74dc8d6f6072eca4075 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="mdescLeft"> </td><td class="mdescRight">Calls add_with_ids with NULL ids. <br/></td></tr>
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<tr class="memitem:a7cf3a1963394f87d61913420a66eb468 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a7cf3a1963394f87d61913420a66eb468">search_preassigned</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> k, const <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *<a class="el" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a>, const float *centroid_dis, float *distances, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *labels, bool store_pairs, const <a class="el" href="structfaiss_1_1IVFSearchParameters.html">IVFSearchParameters</a> *params=nullptr) const </td></tr>
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<tr class="memitem:ae2fd47b7d52603659e269aa8f6abb613 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#ae2fd47b7d52603659e269aa8f6abb613">search</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> k, float *distances, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *labels) const override</td></tr>
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<tr class="memitem:a5b7b4b3dc5ea40f7076a00c81cc83d66 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a5b7b4b3dc5ea40f7076a00c81cc83d66">range_search</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x, float radius, <a class="el" href="structfaiss_1_1RangeSearchResult.html">RangeSearchResult</a> *result) const override</td></tr>
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<tr class="memitem:a20105e3d7c531d6b03bd39b296e39e43 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a20105e3d7c531d6b03bd39b296e39e43"></a>
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void </td><td class="memItemRight" valign="bottom"><b>range_search_preassigned</b> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> nx, const float *x, float radius, const <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *keys, const float *coarse_dis, <a class="el" href="structfaiss_1_1RangeSearchResult.html">RangeSearchResult</a> *result) const </td></tr>
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<tr class="memitem:a3b3270dcfa248dc30117644382a54e39 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a3b3270dcfa248dc30117644382a54e39">reconstruct</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> key, float *recons) const override</td></tr>
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<tr class="memitem:a7cc286dfbd8bfd43ea4b22173e28231c inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a7cc286dfbd8bfd43ea4b22173e28231c">reconstruct_n</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> i0, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> ni, float *recons) const override</td></tr>
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<tr class="memitem:a77aec24920024a09f7661790d9534c10 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a77aec24920024a09f7661790d9534c10">search_and_reconstruct</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> k, float *distances, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *labels, float *recons) const override</td></tr>
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<tr class="memitem:a4e6f5ea9abc1a014531be989b5dea4b7 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a4e6f5ea9abc1a014531be989b5dea4b7"></a>
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<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a4e6f5ea9abc1a014531be989b5dea4b7">remove_ids</a> (const <a class="el" href="structfaiss_1_1IDSelector.html">IDSelector</a> &sel) override</td></tr>
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<tr class="memdesc:a4e6f5ea9abc1a014531be989b5dea4b7 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="mdescLeft"> </td><td class="mdescRight">Dataset manipulation functions. <br/></td></tr>
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<tr class="memitem:a7fc8b9a1fff9f3d24cf7055fbc4fed7b inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a7fc8b9a1fff9f3d24cf7055fbc4fed7b">check_compatible_for_merge</a> (const <a class="el" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> &other) const </td></tr>
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<tr class="separator:a7fc8b9a1fff9f3d24cf7055fbc4fed7b inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a0f22cc237c30c935df5b6560aecf8f01 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a0f22cc237c30c935df5b6560aecf8f01">merge_from</a> (<a class="el" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> &other, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> add_id)</td></tr>
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<tr class="memitem:aa64ecc5e7b286e9b0f252796edd4714b inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#aa64ecc5e7b286e9b0f252796edd4714b">copy_subset_to</a> (<a class="el" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> &other, int subset_type, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> a1, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> a2) const </td></tr>
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<tr class="memitem:a0475311f5faee84d024066906bae0bbd inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0475311f5faee84d024066906bae0bbd"></a>
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size_t </td><td class="memItemRight" valign="bottom"><b>get_list_size</b> (size_t list_no) const </td></tr>
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<tr class="memitem:a1c11ce77f459e2ab3e5d9a4c2263ad89 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a1c11ce77f459e2ab3e5d9a4c2263ad89">make_direct_map</a> (bool new_maintain_direct_map=true)</td></tr>
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<tr class="separator:a1c11ce77f459e2ab3e5d9a4c2263ad89 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a4eb943aeb7df30d44ad9b665452bfcf7 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a4eb943aeb7df30d44ad9b665452bfcf7"></a>
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void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a4eb943aeb7df30d44ad9b665452bfcf7">replace_invlists</a> (<a class="el" href="structfaiss_1_1InvertedLists.html">InvertedLists</a> *il, bool own=false)</td></tr>
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<tr class="memdesc:a4eb943aeb7df30d44ad9b665452bfcf7 inherit pub_methods_structfaiss_1_1IndexIVF"><td class="mdescLeft"> </td><td class="mdescRight">replace the inverted lists, old one is deallocated if own_invlists <br/></td></tr>
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<tr class="inherit_header pub_methods_structfaiss_1_1Index"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_structfaiss_1_1Index')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="structfaiss_1_1Index.html">faiss::Index</a></td></tr>
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<tr class="memitem:a7b8cc435b5619d5d8382010a424bf67e inherit pub_methods_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7b8cc435b5619d5d8382010a424bf67e"></a>
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 </td><td class="memItemRight" valign="bottom"><b>Index</b> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> <a class="el" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>=0, <a class="el" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> metric=METRIC_L2)</td></tr>
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<tr class="separator:a7b8cc435b5619d5d8382010a424bf67e inherit pub_methods_structfaiss_1_1Index"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c inherit pub_methods_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a> (<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> n, const float *x, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> *labels, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> k=1)</td></tr>
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<tr class="memitem:aaae77608bbda70b1098897e9167a82f9 inherit pub_methods_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Index.html#aaae77608bbda70b1098897e9167a82f9">compute_residual</a> (const float *x, float *residual, <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> key) const </td></tr>
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<tr class="separator:aaae77608bbda70b1098897e9167a82f9 inherit pub_methods_structfaiss_1_1Index"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a373c30e3d87d1d4e616f450d87152b1a inherit pub_methods_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Index.html#a373c30e3d87d1d4e616f450d87152b1a">display</a> () const </td></tr>
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<tr class="separator:a373c30e3d87d1d4e616f450d87152b1a inherit pub_methods_structfaiss_1_1Index"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="inherit_header pub_methods_structfaiss_1_1Level1Quantizer"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_structfaiss_1_1Level1Quantizer')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="structfaiss_1_1Level1Quantizer.html">faiss::Level1Quantizer</a></td></tr>
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<tr class="memitem:a0069a6ee1e32c2e0c1c7df9a95740dd4 inherit pub_methods_structfaiss_1_1Level1Quantizer"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0069a6ee1e32c2e0c1c7df9a95740dd4"></a>
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void </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Level1Quantizer.html#a0069a6ee1e32c2e0c1c7df9a95740dd4">train_q1</a> (size_t n, const float *x, bool verbose, <a class="el" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> metric_type)</td></tr>
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<tr class="memdesc:a0069a6ee1e32c2e0c1c7df9a95740dd4 inherit pub_methods_structfaiss_1_1Level1Quantizer"><td class="mdescLeft"> </td><td class="mdescRight">Trains the quantizer and calls train_residual to train sub-quantizers. <br/></td></tr>
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<tr class="memitem:a7262e1eb542b177308dab0c043e90d01 inherit pub_methods_structfaiss_1_1Level1Quantizer"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7262e1eb542b177308dab0c043e90d01"></a>
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 </td><td class="memItemRight" valign="bottom"><b>Level1Quantizer</b> (<a class="el" href="structfaiss_1_1Index.html">Index</a> *<a class="el" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>, size_t <a class="el" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>)</td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-attribs"></a>
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Public Attributes</h2></td></tr>
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<tr class="memitem:afd13b471df293ae5a6e895704c69a4c3"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="afd13b471df293ae5a6e895704c69a4c3"></a>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#afd13b471df293ae5a6e895704c69a4c3">by_residual</a></td></tr>
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<tr class="memdesc:afd13b471df293ae5a6e895704c69a4c3"><td class="mdescLeft"> </td><td class="mdescRight">Encode residual or plain vector? <br/></td></tr>
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<tr class="separator:afd13b471df293ae5a6e895704c69a4c3"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a007303be116c8da65b6d058e3fc77d16"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a007303be116c8da65b6d058e3fc77d16"></a>
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<a class="el" href="structfaiss_1_1ProductQuantizer.html">ProductQuantizer</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a007303be116c8da65b6d058e3fc77d16">pq</a></td></tr>
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<tr class="memdesc:a007303be116c8da65b6d058e3fc77d16"><td class="mdescLeft"> </td><td class="mdescRight">produces the codes <br/></td></tr>
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<tr class="separator:a007303be116c8da65b6d058e3fc77d16"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a9d5373633df7a9bec4de69400b9adeed"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a9d5373633df7a9bec4de69400b9adeed"></a>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a9d5373633df7a9bec4de69400b9adeed">do_polysemous_training</a></td></tr>
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<tr class="memdesc:a9d5373633df7a9bec4de69400b9adeed"><td class="mdescLeft"> </td><td class="mdescRight">reorder PQ centroids after training? <br/></td></tr>
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<tr class="separator:a9d5373633df7a9bec4de69400b9adeed"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a2b14cbb5acb3fc28a4df8fde3f5567cd"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a2b14cbb5acb3fc28a4df8fde3f5567cd"></a>
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<a class="el" href="structfaiss_1_1PolysemousTraining.html">PolysemousTraining</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a2b14cbb5acb3fc28a4df8fde3f5567cd">polysemous_training</a></td></tr>
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<tr class="memdesc:a2b14cbb5acb3fc28a4df8fde3f5567cd"><td class="mdescLeft"> </td><td class="mdescRight">if NULL, use default <br/></td></tr>
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<tr class="separator:a2b14cbb5acb3fc28a4df8fde3f5567cd"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a7430fc4fa030c96497abced3b68358d4"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7430fc4fa030c96497abced3b68358d4"></a>
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size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a7430fc4fa030c96497abced3b68358d4">scan_table_threshold</a></td></tr>
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<tr class="memdesc:a7430fc4fa030c96497abced3b68358d4"><td class="mdescLeft"> </td><td class="mdescRight">use table computation or on-the-fly? <br/></td></tr>
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<tr class="memitem:a3093a0a3e128eafce6e0583b75e9662e"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a3093a0a3e128eafce6e0583b75e9662e"></a>
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int </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a3093a0a3e128eafce6e0583b75e9662e">polysemous_ht</a></td></tr>
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<tr class="memdesc:a3093a0a3e128eafce6e0583b75e9662e"><td class="mdescLeft"> </td><td class="mdescRight">Hamming thresh for polysemous filtering. <br/></td></tr>
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<tr class="separator:a3093a0a3e128eafce6e0583b75e9662e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1c66ff073c18a1edbe8444c24d870583"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a1c66ff073c18a1edbe8444c24d870583">use_precomputed_table</a></td></tr>
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<tr class="memdesc:a1c66ff073c18a1edbe8444c24d870583"><td class="mdescLeft"> </td><td class="mdescRight">if by_residual, build precompute tables <a href="#a1c66ff073c18a1edbe8444c24d870583">More...</a><br/></td></tr>
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<tr class="separator:a1c66ff073c18a1edbe8444c24d870583"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a9b310195d610c3e326471b3758206b59"><td class="memItemLeft" align="right" valign="top">std::vector< float > </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a9b310195d610c3e326471b3758206b59">precomputed_table</a></td></tr>
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<tr class="separator:a9b310195d610c3e326471b3758206b59"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="inherit_header pub_attribs_structfaiss_1_1IndexIVF"><td colspan="2" onclick="javascript:toggleInherit('pub_attribs_structfaiss_1_1IndexIVF')"><img src="closed.png" alt="-"/> Public Attributes inherited from <a class="el" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a></td></tr>
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<tr class="memitem:aa0e8fc5e04cbd8e0dde61f98bc7dd0bc inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aa0e8fc5e04cbd8e0dde61f98bc7dd0bc"></a>
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<a class="el" href="structfaiss_1_1InvertedLists.html">InvertedLists</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a></td></tr>
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<tr class="memdesc:aa0e8fc5e04cbd8e0dde61f98bc7dd0bc inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="mdescLeft"> </td><td class="mdescRight">Acess to the actual data. <br/></td></tr>
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<tr class="separator:aa0e8fc5e04cbd8e0dde61f98bc7dd0bc inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a5743b18d78fe1b9910d8ff8670f207d7 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a5743b18d78fe1b9910d8ff8670f207d7"></a>
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bool </td><td class="memItemRight" valign="bottom"><b>own_invlists</b></td></tr>
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<tr class="separator:a5743b18d78fe1b9910d8ff8670f207d7 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a46d1aeddb60643c5b3f096147c3e028f inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a46d1aeddb60643c5b3f096147c3e028f"></a>
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size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a></td></tr>
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<tr class="memdesc:a46d1aeddb60643c5b3f096147c3e028f inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="mdescLeft"> </td><td class="mdescRight">code size per vector in bytes <br/></td></tr>
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<tr class="separator:a46d1aeddb60643c5b3f096147c3e028f inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:affed235eadf27a13d753ee4d33a1dc58 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="affed235eadf27a13d753ee4d33a1dc58"></a>
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size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a></td></tr>
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<tr class="memdesc:affed235eadf27a13d753ee4d33a1dc58 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="mdescLeft"> </td><td class="mdescRight">number of probes at query time <br/></td></tr>
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<tr class="separator:affed235eadf27a13d753ee4d33a1dc58 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a7f2dd34f66f8770acba74a0a591fa4a8 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7f2dd34f66f8770acba74a0a591fa4a8"></a>
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size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a7f2dd34f66f8770acba74a0a591fa4a8">max_codes</a></td></tr>
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<tr class="memdesc:a7f2dd34f66f8770acba74a0a591fa4a8 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="mdescLeft"> </td><td class="mdescRight">max nb of codes to visit to do a query <br/></td></tr>
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<tr class="separator:a7f2dd34f66f8770acba74a0a591fa4a8 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a244ec2067da495ff1493687e0048ae02 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#a244ec2067da495ff1493687e0048ae02">parallel_mode</a></td></tr>
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<tr class="separator:a244ec2067da495ff1493687e0048ae02 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aedd0c14b5654295b291638ec7f9f9517 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aedd0c14b5654295b291638ec7f9f9517"></a>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a></td></tr>
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<tr class="memdesc:aedd0c14b5654295b291638ec7f9f9517 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="mdescLeft"> </td><td class="mdescRight">map for direct access to the elements. Enables <a class="el" href="structfaiss_1_1IndexIVF.html#a3b3270dcfa248dc30117644382a54e39">reconstruct()</a>. <br/></td></tr>
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<tr class="separator:aedd0c14b5654295b291638ec7f9f9517 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a009f1cf185e6468de2c4ec5cb8766469 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a009f1cf185e6468de2c4ec5cb8766469"></a>
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std::vector< <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> > </td><td class="memItemRight" valign="bottom"><b>direct_map</b></td></tr>
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<tr class="separator:a009f1cf185e6468de2c4ec5cb8766469 inherit pub_attribs_structfaiss_1_1IndexIVF"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="inherit_header pub_attribs_structfaiss_1_1Index"><td colspan="2" onclick="javascript:toggleInherit('pub_attribs_structfaiss_1_1Index')"><img src="closed.png" alt="-"/> Public Attributes inherited from <a class="el" href="structfaiss_1_1Index.html">faiss::Index</a></td></tr>
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<tr class="memitem:a2a002388d2c081c2dbab8508dcefe73d inherit pub_attribs_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a2a002388d2c081c2dbab8508dcefe73d"></a>
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int </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a></td></tr>
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<tr class="memdesc:a2a002388d2c081c2dbab8508dcefe73d inherit pub_attribs_structfaiss_1_1Index"><td class="mdescLeft"> </td><td class="mdescRight">vector dimension <br/></td></tr>
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<tr class="separator:a2a002388d2c081c2dbab8508dcefe73d inherit pub_attribs_structfaiss_1_1Index"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a6970683faa021b7a6f1a0865c0d4eccd inherit pub_attribs_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a6970683faa021b7a6f1a0865c0d4eccd"></a>
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<a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a></td></tr>
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<tr class="memdesc:a6970683faa021b7a6f1a0865c0d4eccd inherit pub_attribs_structfaiss_1_1Index"><td class="mdescLeft"> </td><td class="mdescRight">total nb of indexed vectors <br/></td></tr>
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<tr class="separator:a6970683faa021b7a6f1a0865c0d4eccd inherit pub_attribs_structfaiss_1_1Index"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a5590d847c5c2b958affd2a05e58a6f23 inherit pub_attribs_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a5590d847c5c2b958affd2a05e58a6f23"></a>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a></td></tr>
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<tr class="memdesc:a5590d847c5c2b958affd2a05e58a6f23 inherit pub_attribs_structfaiss_1_1Index"><td class="mdescLeft"> </td><td class="mdescRight">verbosity level <br/></td></tr>
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<tr class="separator:a5590d847c5c2b958affd2a05e58a6f23 inherit pub_attribs_structfaiss_1_1Index"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a6e92732617c4dbe364e7678dd8773a7f inherit pub_attribs_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a6e92732617c4dbe364e7678dd8773a7f"></a>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a></td></tr>
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<tr class="memdesc:a6e92732617c4dbe364e7678dd8773a7f inherit pub_attribs_structfaiss_1_1Index"><td class="mdescLeft"> </td><td class="mdescRight">set if the <a class="el" href="structfaiss_1_1Index.html">Index</a> does not require training, or if training is done already <br/></td></tr>
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<tr class="separator:a6e92732617c4dbe364e7678dd8773a7f inherit pub_attribs_structfaiss_1_1Index"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a8e18f641854b2bde83ecff0a2f9a6f4e inherit pub_attribs_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a8e18f641854b2bde83ecff0a2f9a6f4e"></a>
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<a class="el" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a></td></tr>
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<tr class="memdesc:a8e18f641854b2bde83ecff0a2f9a6f4e inherit pub_attribs_structfaiss_1_1Index"><td class="mdescLeft"> </td><td class="mdescRight">type of metric this index uses for search <br/></td></tr>
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<tr class="separator:a8e18f641854b2bde83ecff0a2f9a6f4e inherit pub_attribs_structfaiss_1_1Index"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="inherit_header pub_attribs_structfaiss_1_1Level1Quantizer"><td colspan="2" onclick="javascript:toggleInherit('pub_attribs_structfaiss_1_1Level1Quantizer')"><img src="closed.png" alt="-"/> Public Attributes inherited from <a class="el" href="structfaiss_1_1Level1Quantizer.html">faiss::Level1Quantizer</a></td></tr>
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<tr class="memitem:a3cf99e2ee92b8558a066f821efab95d5 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a3cf99e2ee92b8558a066f821efab95d5"></a>
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<a class="el" href="structfaiss_1_1Index.html">Index</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a></td></tr>
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<tr class="memdesc:a3cf99e2ee92b8558a066f821efab95d5 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="mdescLeft"> </td><td class="mdescRight">quantizer that maps vectors to inverted lists <br/></td></tr>
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<tr class="separator:a3cf99e2ee92b8558a066f821efab95d5 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1c4fc9d874d9492ee0ea27a5be388fa7 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a1c4fc9d874d9492ee0ea27a5be388fa7"></a>
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size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a></td></tr>
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<tr class="memdesc:a1c4fc9d874d9492ee0ea27a5be388fa7 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="mdescLeft"> </td><td class="mdescRight">number of possible key values <br/></td></tr>
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<tr class="separator:a1c4fc9d874d9492ee0ea27a5be388fa7 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1dcea762fc322fdcffe64f78994edea0 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memItemLeft" align="right" valign="top">char </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Level1Quantizer.html#a1dcea762fc322fdcffe64f78994edea0">quantizer_trains_alone</a></td></tr>
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<tr class="separator:a1dcea762fc322fdcffe64f78994edea0 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ab688c629cd42122d73517078b87f483d inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab688c629cd42122d73517078b87f483d"></a>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Level1Quantizer.html#ab688c629cd42122d73517078b87f483d">own_fields</a></td></tr>
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<tr class="memdesc:ab688c629cd42122d73517078b87f483d inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="mdescLeft"> </td><td class="mdescRight">whether object owns the quantizer <br/></td></tr>
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<tr class="separator:ab688c629cd42122d73517078b87f483d inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:abb7097ed40b15ba0af08af6d03608f72 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="abb7097ed40b15ba0af08af6d03608f72"></a>
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<a class="el" href="structfaiss_1_1ClusteringParameters.html">ClusteringParameters</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Level1Quantizer.html#abb7097ed40b15ba0af08af6d03608f72">cp</a></td></tr>
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<tr class="memdesc:abb7097ed40b15ba0af08af6d03608f72 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="mdescLeft"> </td><td class="mdescRight">to override default clustering params <br/></td></tr>
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<tr class="separator:abb7097ed40b15ba0af08af6d03608f72 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a45d29dd6a5c53789c08e5ceb3f63d989 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a45d29dd6a5c53789c08e5ceb3f63d989"></a>
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<a class="el" href="structfaiss_1_1Index.html">Index</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Level1Quantizer.html#a45d29dd6a5c53789c08e5ceb3f63d989">clustering_index</a></td></tr>
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<tr class="memdesc:a45d29dd6a5c53789c08e5ceb3f63d989 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="mdescLeft"> </td><td class="mdescRight">to override index used during clustering <br/></td></tr>
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<tr class="separator:a45d29dd6a5c53789c08e5ceb3f63d989 inherit pub_attribs_structfaiss_1_1Level1Quantizer"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-attribs"></a>
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Static Public Attributes</h2></td></tr>
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<tr class="memitem:a823ae6c4131996815fa4e90c7d1d13f6"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a823ae6c4131996815fa4e90c7d1d13f6"></a>
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static size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1IndexIVFPQ.html#a823ae6c4131996815fa4e90c7d1d13f6">precomputed_table_max_bytes</a> = ((size_t)1) << 31</td></tr>
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<tr class="memdesc:a823ae6c4131996815fa4e90c7d1d13f6"><td class="mdescLeft"> </td><td class="mdescRight">2G by default, accommodates tables up to PQ32 w/ 65536 centroids <br/></td></tr>
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<tr class="separator:a823ae6c4131996815fa4e90c7d1d13f6"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="inherited"></a>
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Additional Inherited Members</h2></td></tr>
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<tr class="inherit_header pub_types_structfaiss_1_1Index"><td colspan="2" onclick="javascript:toggleInherit('pub_types_structfaiss_1_1Index')"><img src="closed.png" alt="-"/> Public Types inherited from <a class="el" href="structfaiss_1_1Index.html">faiss::Index</a></td></tr>
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<tr class="memitem:ad3f0d3071f987baabbdd3da4500c87ea inherit pub_types_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ad3f0d3071f987baabbdd3da4500c87ea"></a>
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using </td><td class="memItemRight" valign="bottom"><a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> = long</td></tr>
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<tr class="memdesc:ad3f0d3071f987baabbdd3da4500c87ea inherit pub_types_structfaiss_1_1Index"><td class="mdescLeft"> </td><td class="mdescRight">all indices are this type <br/></td></tr>
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<tr class="separator:ad3f0d3071f987baabbdd3da4500c87ea inherit pub_types_structfaiss_1_1Index"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:af317cb1e2ad0bd145f716f2243b693eb inherit pub_types_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="af317cb1e2ad0bd145f716f2243b693eb"></a>
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using </td><td class="memItemRight" valign="bottom"><b>component_t</b> = float</td></tr>
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<tr class="separator:af317cb1e2ad0bd145f716f2243b693eb inherit pub_types_structfaiss_1_1Index"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1c60d7a12bf3ad27054963df8cccd93f inherit pub_types_structfaiss_1_1Index"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a1c60d7a12bf3ad27054963df8cccd93f"></a>
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using </td><td class="memItemRight" valign="bottom"><b>distance_t</b> = float</td></tr>
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<tr class="separator:a1c60d7a12bf3ad27054963df8cccd93f inherit pub_types_structfaiss_1_1Index"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>Inverted file with Product Quantizer encoding. Each residual vector is encoded as a product quantizer code. </p>
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<p>Definition at line <a class="el" href="IndexIVFPQ_8h_source.html#l00034">34</a> of file <a class="el" href="IndexIVFPQ_8h_source.html">IndexIVFPQ.h</a>.</p>
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</div><h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">void faiss::IndexIVFPQ::add_core_o </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> </td>
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<td class="paramname"><em>n</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const float * </td>
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<td class="paramname"><em>x</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const long * </td>
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<td class="paramname"><em>xids</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">float * </td>
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<td class="paramname"><em>residuals_2</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const long * </td>
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<td class="paramname"><em>precomputed_idx</em> = <code>nullptr</code> </td>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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<p>same as add_core, also:</p>
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<ul>
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<li>output 2nd level residuals if residuals_2 != NULL</li>
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<li>use precomputed list numbers if precomputed_idx != NULL </li>
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</ul>
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<p>Definition at line <a class="el" href="IndexIVFPQ_8cpp_source.html#l00220">220</a> of file <a class="el" href="IndexIVFPQ_8cpp_source.html">IndexIVFPQ.cpp</a>.</p>
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<td class="memname">void faiss::IndexIVFPQ::encode_multiple </td>
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<td>(</td>
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<td class="paramtype">size_t </td>
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<td class="paramname"><em>n</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">long * </td>
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<td class="paramname"><em>keys</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const float * </td>
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<td class="paramname"><em>x</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">uint8_t * </td>
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<td class="paramname"><em>codes</em>, </td>
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<td class="paramtype">bool </td>
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<td class="paramname"><em>compute_keys</em> = <code>false</code> </td>
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<td></td>
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<td>)</td>
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<td></td><td> const</td>
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<p>Encode multiple vectors</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">n</td><td>nb vectors to encode </td></tr>
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<tr><td class="paramname">keys</td><td>posting list ids for those vectors (size n) </td></tr>
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<tr><td class="paramname">x</td><td>vectors (size n * d) </td></tr>
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<tr><td class="paramname">codes</td><td>output codes (size n * code_size) </td></tr>
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<tr><td class="paramname">compute_keys</td><td>if false, assume keys are precomputed, otherwise compute them </td></tr>
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<p>Definition at line <a class="el" href="IndexIVFPQ_8cpp_source.html#l00149">149</a> of file <a class="el" href="IndexIVFPQ_8cpp_source.html">IndexIVFPQ.cpp</a>.</p>
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<td class="memname">void faiss::IndexIVFPQ::encode_vectors </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> </td>
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<td class="paramname"><em>n</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const float * </td>
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<td class="paramname"><em>x</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const <a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> * </td>
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<td class="paramname"><em>list_nos</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint8_t * </td>
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<td class="paramname"><em>codes</em> </td>
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<td></td>
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<td>)</td>
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<td></td><td> const</td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">override</span><span class="mlabel">virtual</span></span> </td>
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</table>
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</div><div class="memdoc">
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<p>Encodes a set of vectors as they would appear in the inverted lists</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">list_nos</td><td>inverted list ids as returned by the quantizer (size n). -1s are ignored. </td></tr>
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<tr><td class="paramname">codes</td><td>output codes, size n * code_size </td></tr>
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</table>
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</dd>
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<p>Implements <a class="el" href="structfaiss_1_1IndexIVF.html#a2f16f939a418d8e58ff43f4ee0dc17cc">faiss::IndexIVF</a>.</p>
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<p>Definition at line <a class="el" href="IndexIVFPQ_8cpp_source.html#l00206">206</a> of file <a class="el" href="IndexIVFPQ_8cpp_source.html">IndexIVFPQ.cpp</a>.</p>
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<td class="memname">size_t faiss::IndexIVFPQ::find_duplicates </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">idx_t</a> * </td>
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<td class="paramname"><em>ids</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">size_t * </td>
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<td class="paramname"><em>lims</em> </td>
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<td></td>
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<td>)</td>
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<td></td><td> const</td>
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<p>Find exact duplicates in the dataset.</p>
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<p>the duplicates are returned in pre-allocated arrays (see the max sizes).</p>
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<p>lims limits between groups of duplicates (max size ntotal / 2 + 1) ids ids[lims[i]] : ids[lims[i+1]-1] is a group of duplicates (max size ntotal) </p>
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<dl class="section return"><dt>Returns</dt><dd>n number of groups found </dd></dl>
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<p>Definition at line <a class="el" href="IndexIVFPQ_8cpp_source.html#l01141">1141</a> of file <a class="el" href="IndexIVFPQ_8cpp_source.html">IndexIVFPQ.cpp</a>.</p>
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<td class="memname">void faiss::IndexIVFPQ::precompute_table </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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<p>build precomputed table </p>
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<p>Precomputed tables for residuals</p>
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<p>During IVFPQ search with by_residual, we compute </p>
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<pre class="fragment">d = || x - y_C - y_R ||^2
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</pre><p>where x is the query vector, y_C the coarse centroid, y_R the refined PQ centroid. The expression can be decomposed as:</p>
|
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<p>d = || x - y_C ||^2 + || y_R ||^2 + 2 * (y_C|y_R) - 2 * (x|y_R) </p>
|
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<hr/>
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<p> term 1 term 2 term 3</p>
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<p>When using multiprobe, we use the following decomposition:</p>
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<ul>
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<li>term 1 is the distance to the coarse centroid, that is computed during the 1st stage search.</li>
|
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<li>term 2 can be precomputed, as it does not involve x. However, because of the PQ, it needs nlist * M * ksub storage. This is why use_precomputed_table is off by default</li>
|
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<li>term 3 is the classical non-residual distance table.</li>
|
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</ul>
|
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<p>Since y_R defined by a product quantizer, it is split across subvectors and stored separately for each subvector. If the coarse quantizer is a <a class="el" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> then the table can be stored more compactly.</p>
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<p>At search time, the tables for term 2 and term 3 are added up. This is faster when the length of the lists is > ksub * M. </p>
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<p>Definition at line <a class="el" href="IndexIVFPQ_8cpp_source.html#l00363">363</a> of file <a class="el" href="IndexIVFPQ_8cpp_source.html">IndexIVFPQ.cpp</a>.</p>
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<td class="memname">void faiss::IndexIVFPQ::reconstruct_from_offset </td>
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<td>(</td>
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<td class="paramtype">long </td>
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<td class="paramname"><em>list_no</em>, </td>
|
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</tr>
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<tr>
|
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<td class="paramkey"></td>
|
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<td></td>
|
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<td class="paramtype">long </td>
|
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<td class="paramname"><em>offset</em>, </td>
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</tr>
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<tr>
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|
<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">float * </td>
|
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<td class="paramname"><em>recons</em> </td>
|
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td> const</td>
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</table>
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</td>
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<td class="mlabels-right">
|
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<span class="mlabels"><span class="mlabel">override</span><span class="mlabel">virtual</span></span> </td>
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</div><div class="memdoc">
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<p>Reconstruct a vector given the location in terms of (inv list index + inv list offset) instead of the id.</p>
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<p>Useful for reconstructing when the direct_map is not maintained and the inv list offset is computed by <a class="el" href="structfaiss_1_1IndexIVF.html#a7cf3a1963394f87d61913420a66eb468">search_preassigned()</a> with <code>store_pairs</code> set. </p>
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|
<p>Reimplemented from <a class="el" href="structfaiss_1_1IndexIVF.html#acaa919a002354a7944266c26f8965170">faiss::IndexIVF</a>.</p>
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<p>Reimplemented in <a class="el" href="structfaiss_1_1IndexIVFPQR.html#a83aa33ae77eb80f6564992e250abcf41">faiss::IndexIVFPQR</a>.</p>
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<p>Definition at line <a class="el" href="IndexIVFPQ_8cpp_source.html#l00310">310</a> of file <a class="el" href="IndexIVFPQ_8cpp_source.html">IndexIVFPQ.cpp</a>.</p>
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</div>
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<h2 class="groupheader">Member Data Documentation</h2>
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<a class="anchor" id="a9b310195d610c3e326471b3758206b59"></a>
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<td class="memname">std::vector<float> faiss::IndexIVFPQ::precomputed_table</td>
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</div><div class="memdoc">
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<p>if use_precompute_table size nlist * pq.M * pq.ksub </p>
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<p>Definition at line <a class="el" href="IndexIVFPQ_8h_source.html#l00059">59</a> of file <a class="el" href="IndexIVFPQ_8h_source.html">IndexIVFPQ.h</a>.</p>
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<td class="memname">int faiss::IndexIVFPQ::use_precomputed_table</td>
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</div><div class="memdoc">
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<p>if by_residual, build precompute tables </p>
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<p>Precompute table that speed up query preprocessing at some memory cost =-1: force disable =0: decide heuristically (default: use tables only if they are < precomputed_tables_max_bytes) =1: tables that work for all quantizers (size 256 * nlist * M) =2: specific version for <a class="el" href="structfaiss_1_1MultiIndexQuantizer.html">MultiIndexQuantizer</a> (much more compact) </p>
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<p>Definition at line <a class="el" href="IndexIVFPQ_8h_source.html#l00054">54</a> of file <a class="el" href="IndexIVFPQ_8h_source.html">IndexIVFPQ.h</a>.</p>
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<hr/>The documentation for this struct was generated from the following files:<ul>
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<li>/data/users/hoss/faiss/<a class="el" href="IndexIVFPQ_8h_source.html">IndexIVFPQ.h</a></li>
|
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<li>/data/users/hoss/faiss/<a class="el" href="IndexIVFPQ_8cpp_source.html">IndexIVFPQ.cpp</a></li>
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</ul>
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