54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
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# Copyright (c) Facebook, Inc. and its affiliates.
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#
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# This source code is licensed under the MIT license found in the
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# LICENSE file in the root directory of this source tree.
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import numpy as np
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import unittest
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import faiss
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from faiss.contrib import datasets
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class TestDistanceComputer(unittest.TestCase):
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def do_test(self, factory_string, metric_type=faiss.METRIC_L2):
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ds = datasets.SyntheticDataset(32, 1000, 200, 20)
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index = faiss.index_factory(32, factory_string, metric_type)
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index.train(ds.get_train())
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index.add(ds.get_database())
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xq = ds.get_queries()
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Dref, Iref = index.search(xq, 10)
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dc = index.get_distance_computer()
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self.assertTrue(dc.this.own())
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for q in range(ds.nq):
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dc.set_query(faiss.swig_ptr(xq[q]))
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for j in range(10):
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ref_dis = Dref[q, j]
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new_dis = dc(int(Iref[q, j]))
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np.testing.assert_almost_equal(
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new_dis, ref_dis, decimal=5)
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def test_distance_computer_PQ(self):
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self.do_test("PQ8np")
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def test_distance_computer_SQ(self):
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self.do_test("SQ8")
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def test_distance_computer_SQ6(self):
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self.do_test("SQ6")
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def test_distance_computer_PQbit6(self):
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self.do_test("PQ8x6np")
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def test_distance_computer_PQbit6_ip(self):
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self.do_test("PQ8x6np", faiss.METRIC_INNER_PRODUCT)
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def test_distance_computer_VT(self):
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self.do_test("PCA20,SQ8")
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