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<div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
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<h1>Source code for torchreid.data.datasets.video.mars</h1><div class="highlight"><pre>
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<span></span><span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">absolute_import</span>
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<span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">print_function</span>
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<span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">division</span>
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<span class="kn">import</span> <span class="nn">os.path</span> <span class="k">as</span> <span class="nn">osp</span>
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<span class="kn">from</span> <span class="nn">scipy.io</span> <span class="k">import</span> <span class="n">loadmat</span>
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<span class="kn">import</span> <span class="nn">warnings</span>
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<span class="kn">from</span> <span class="nn">torchreid.data.datasets</span> <span class="k">import</span> <span class="n">VideoDataset</span>
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<div class="viewcode-block" id="Mars"><a class="viewcode-back" href="../../../../../pkg/data.html#torchreid.data.datasets.video.mars.Mars">[docs]</a><span class="k">class</span> <span class="nc">Mars</span><span class="p">(</span><span class="n">VideoDataset</span><span class="p">):</span>
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<span class="sd">"""MARS.</span>
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<span class="sd"> Reference:</span>
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<span class="sd"> Zheng et al. MARS: A Video Benchmark for Large-Scale Person Re-identification. ECCV 2016.</span>
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<span class="sd"> URL: `<http://www.liangzheng.com.cn/Project/project_mars.html>`_</span>
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<span class="sd"> </span>
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<span class="sd"> Dataset statistics:</span>
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<span class="sd"> - identities: 1261.</span>
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<span class="sd"> - tracklets: 8298 (train) + 1980 (query) + 9330 (gallery).</span>
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<span class="sd"> - cameras: 6.</span>
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<span class="sd"> """</span>
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<span class="n">dataset_dir</span> <span class="o">=</span> <span class="s1">'mars'</span>
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<span class="n">dataset_url</span> <span class="o">=</span> <span class="kc">None</span>
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<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">root</span><span class="o">=</span><span class="s1">''</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">root</span> <span class="o">=</span> <span class="n">osp</span><span class="o">.</span><span class="n">abspath</span><span class="p">(</span><span class="n">osp</span><span class="o">.</span><span class="n">expanduser</span><span class="p">(</span><span class="n">root</span><span class="p">))</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">dataset_dir</span> <span class="o">=</span> <span class="n">osp</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">root</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dataset_dir</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">download_dataset</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dataset_dir</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dataset_url</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">train_name_path</span> <span class="o">=</span> <span class="n">osp</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dataset_dir</span><span class="p">,</span> <span class="s1">'info/train_name.txt'</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">test_name_path</span> <span class="o">=</span> <span class="n">osp</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dataset_dir</span><span class="p">,</span> <span class="s1">'info/test_name.txt'</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">track_train_info_path</span> <span class="o">=</span> <span class="n">osp</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dataset_dir</span><span class="p">,</span> <span class="s1">'info/tracks_train_info.mat'</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">track_test_info_path</span> <span class="o">=</span> <span class="n">osp</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dataset_dir</span><span class="p">,</span> <span class="s1">'info/tracks_test_info.mat'</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">query_IDX_path</span> <span class="o">=</span> <span class="n">osp</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dataset_dir</span><span class="p">,</span> <span class="s1">'info/query_IDX.mat'</span><span class="p">)</span>
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<span class="n">required_files</span> <span class="o">=</span> <span class="p">[</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">dataset_dir</span><span class="p">,</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">train_name_path</span><span class="p">,</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">test_name_path</span><span class="p">,</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">track_train_info_path</span><span class="p">,</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">track_test_info_path</span><span class="p">,</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">query_IDX_path</span>
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<span class="p">]</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">check_before_run</span><span class="p">(</span><span class="n">required_files</span><span class="p">)</span>
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<span class="n">train_names</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_names</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">train_name_path</span><span class="p">)</span>
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<span class="n">test_names</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_names</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">test_name_path</span><span class="p">)</span>
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<span class="n">track_train</span> <span class="o">=</span> <span class="n">loadmat</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">track_train_info_path</span><span class="p">)[</span><span class="s1">'track_train_info'</span><span class="p">]</span> <span class="c1"># numpy.ndarray (8298, 4)</span>
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<span class="n">track_test</span> <span class="o">=</span> <span class="n">loadmat</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">track_test_info_path</span><span class="p">)[</span><span class="s1">'track_test_info'</span><span class="p">]</span> <span class="c1"># numpy.ndarray (12180, 4)</span>
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<span class="n">query_IDX</span> <span class="o">=</span> <span class="n">loadmat</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">query_IDX_path</span><span class="p">)[</span><span class="s1">'query_IDX'</span><span class="p">]</span><span class="o">.</span><span class="n">squeeze</span><span class="p">()</span> <span class="c1"># numpy.ndarray (1980,)</span>
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<span class="n">query_IDX</span> <span class="o">-=</span> <span class="mi">1</span> <span class="c1"># index from 0</span>
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<span class="n">track_query</span> <span class="o">=</span> <span class="n">track_test</span><span class="p">[</span><span class="n">query_IDX</span><span class="p">,:]</span>
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<span class="n">gallery_IDX</span> <span class="o">=</span> <span class="p">[</span><span class="n">i</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">track_test</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="k">if</span> <span class="n">i</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">query_IDX</span><span class="p">]</span>
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<span class="n">track_gallery</span> <span class="o">=</span> <span class="n">track_test</span><span class="p">[</span><span class="n">gallery_IDX</span><span class="p">,:]</span>
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<span class="n">train</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_data</span><span class="p">(</span><span class="n">train_names</span><span class="p">,</span> <span class="n">track_train</span><span class="p">,</span> <span class="n">home_dir</span><span class="o">=</span><span class="s1">'bbox_train'</span><span class="p">,</span> <span class="n">relabel</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
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<span class="n">query</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_data</span><span class="p">(</span><span class="n">test_names</span><span class="p">,</span> <span class="n">track_query</span><span class="p">,</span> <span class="n">home_dir</span><span class="o">=</span><span class="s1">'bbox_test'</span><span class="p">,</span> <span class="n">relabel</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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<span class="n">gallery</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_data</span><span class="p">(</span><span class="n">test_names</span><span class="p">,</span> <span class="n">track_gallery</span><span class="p">,</span> <span class="n">home_dir</span><span class="o">=</span><span class="s1">'bbox_test'</span><span class="p">,</span> <span class="n">relabel</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
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<span class="nb">super</span><span class="p">(</span><span class="n">Mars</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="n">train</span><span class="p">,</span> <span class="n">query</span><span class="p">,</span> <span class="n">gallery</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
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<span class="k">def</span> <span class="nf">get_names</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fpath</span><span class="p">):</span>
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<span class="n">names</span> <span class="o">=</span> <span class="p">[]</span>
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<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">fpath</span><span class="p">,</span> <span class="s1">'r'</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
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<span class="k">for</span> <span class="n">line</span> <span class="ow">in</span> <span class="n">f</span><span class="p">:</span>
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<span class="n">new_line</span> <span class="o">=</span> <span class="n">line</span><span class="o">.</span><span class="n">rstrip</span><span class="p">()</span>
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<span class="n">names</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">new_line</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">names</span>
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<span class="k">def</span> <span class="nf">process_data</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">names</span><span class="p">,</span> <span class="n">meta_data</span><span class="p">,</span> <span class="n">home_dir</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">relabel</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">min_seq_len</span><span class="o">=</span><span class="mi">0</span><span class="p">):</span>
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<span class="k">assert</span> <span class="n">home_dir</span> <span class="ow">in</span> <span class="p">[</span><span class="s1">'bbox_train'</span><span class="p">,</span> <span class="s1">'bbox_test'</span><span class="p">]</span>
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<span class="n">num_tracklets</span> <span class="o">=</span> <span class="n">meta_data</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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<span class="n">pid_list</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">meta_data</span><span class="p">[:,</span><span class="mi">2</span><span class="p">]</span><span class="o">.</span><span class="n">tolist</span><span class="p">()))</span>
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<span class="k">if</span> <span class="n">relabel</span><span class="p">:</span>
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<span class="n">pid2label</span> <span class="o">=</span> <span class="p">{</span><span class="n">pid</span><span class="p">:</span><span class="n">label</span> <span class="k">for</span> <span class="n">label</span><span class="p">,</span> <span class="n">pid</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">pid_list</span><span class="p">)}</span>
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<span class="n">tracklets</span> <span class="o">=</span> <span class="p">[]</span>
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<span class="k">for</span> <span class="n">tracklet_idx</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">num_tracklets</span><span class="p">):</span>
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<span class="n">data</span> <span class="o">=</span> <span class="n">meta_data</span><span class="p">[</span><span class="n">tracklet_idx</span><span class="p">,</span><span class="o">...</span><span class="p">]</span>
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<span class="n">start_index</span><span class="p">,</span> <span class="n">end_index</span><span class="p">,</span> <span class="n">pid</span><span class="p">,</span> <span class="n">camid</span> <span class="o">=</span> <span class="n">data</span>
|
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<span class="k">if</span> <span class="n">pid</span> <span class="o">==</span> <span class="o">-</span><span class="mi">1</span><span class="p">:</span>
|
|
<span class="k">continue</span> <span class="c1"># junk images are just ignored</span>
|
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<span class="k">assert</span> <span class="mi">1</span> <span class="o"><=</span> <span class="n">camid</span> <span class="o"><=</span> <span class="mi">6</span>
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<span class="k">if</span> <span class="n">relabel</span><span class="p">:</span> <span class="n">pid</span> <span class="o">=</span> <span class="n">pid2label</span><span class="p">[</span><span class="n">pid</span><span class="p">]</span>
|
|
<span class="n">camid</span> <span class="o">-=</span> <span class="mi">1</span> <span class="c1"># index starts from 0</span>
|
|
<span class="n">img_names</span> <span class="o">=</span> <span class="n">names</span><span class="p">[</span><span class="n">start_index</span> <span class="o">-</span> <span class="mi">1</span><span class="p">:</span><span class="n">end_index</span><span class="p">]</span>
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<span class="c1"># make sure image names correspond to the same person</span>
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<span class="n">pnames</span> <span class="o">=</span> <span class="p">[</span><span class="n">img_name</span><span class="p">[:</span><span class="mi">4</span><span class="p">]</span> <span class="k">for</span> <span class="n">img_name</span> <span class="ow">in</span> <span class="n">img_names</span><span class="p">]</span>
|
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<span class="k">assert</span> <span class="nb">len</span><span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">pnames</span><span class="p">))</span> <span class="o">==</span> <span class="mi">1</span><span class="p">,</span> <span class="s1">'Error: a single tracklet contains different person images'</span>
|
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<span class="c1"># make sure all images are captured under the same camera</span>
|
|
<span class="n">camnames</span> <span class="o">=</span> <span class="p">[</span><span class="n">img_name</span><span class="p">[</span><span class="mi">5</span><span class="p">]</span> <span class="k">for</span> <span class="n">img_name</span> <span class="ow">in</span> <span class="n">img_names</span><span class="p">]</span>
|
|
<span class="k">assert</span> <span class="nb">len</span><span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">camnames</span><span class="p">))</span> <span class="o">==</span> <span class="mi">1</span><span class="p">,</span> <span class="s1">'Error: images are captured under different cameras!'</span>
|
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<span class="c1"># append image names with directory information</span>
|
|
<span class="n">img_paths</span> <span class="o">=</span> <span class="p">[</span><span class="n">osp</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dataset_dir</span><span class="p">,</span> <span class="n">home_dir</span><span class="p">,</span> <span class="n">img_name</span><span class="p">[:</span><span class="mi">4</span><span class="p">],</span> <span class="n">img_name</span><span class="p">)</span> <span class="k">for</span> <span class="n">img_name</span> <span class="ow">in</span> <span class="n">img_names</span><span class="p">]</span>
|
|
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">img_paths</span><span class="p">)</span> <span class="o">>=</span> <span class="n">min_seq_len</span><span class="p">:</span>
|
|
<span class="n">img_paths</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">img_paths</span><span class="p">)</span>
|
|
<span class="n">tracklets</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">img_paths</span><span class="p">,</span> <span class="n">pid</span><span class="p">,</span> <span class="n">camid</span><span class="p">))</span>
|
|
|
|
<span class="k">return</span> <span class="n">tracklets</span>
|
|
|
|
<div class="viewcode-block" id="Mars.combine_all"><a class="viewcode-back" href="../../../../../pkg/data.html#torchreid.data.datasets.video.mars.Mars.combine_all">[docs]</a> <span class="k">def</span> <span class="nf">combine_all</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
|
|
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span><span class="s1">'Some query IDs do not appear in gallery. Therefore, combineall '</span>
|
|
<span class="s1">'does not make any difference to Mars'</span><span class="p">)</span></div></div>
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</pre></div>
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