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<title>motrackers.detectors.caffe — Multi-object trackers in Python 1.0.0 documentation</title>
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<h1>Source code for motrackers.detectors.caffe</h1><div class="highlight"><pre>
<span></span><span class="kn">import</span> <span class="nn">cv2</span> <span class="k">as</span> <span class="nn">cv</span>
<span class="kn">from</span> <span class="nn">motrackers.detectors.detector</span> <span class="kn">import</span> <span class="n">Detector</span>
<span class="kn">from</span> <span class="nn">motrackers.utils.misc</span> <span class="kn">import</span> <span class="n">load_labelsjson</span>
<div class="viewcode-block" id="Caffe_SSDMobileNet"><a class="viewcode-back" href="../../../includeme/apidocuments.html#motrackers.detectors.caffe.Caffe_SSDMobileNet">[docs]</a><span class="k">class</span> <span class="nc">Caffe_SSDMobileNet</span><span class="p">(</span><span class="n">Detector</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Caffe SSD MobileNet model for Object Detection.</span>
<span class="sd"> Args:</span>
<span class="sd"> weights_path (str): path to network weights file.</span>
<span class="sd"> configfile_path (str): path to network configuration file.</span>
<span class="sd"> labels_path (str): path to data labels json file.</span>
<span class="sd"> confidence_threshold (float): confidence threshold to select the detected object.</span>
<span class="sd"> nms_threshold (float): Non-maximum suppression threshold.</span>
<span class="sd"> draw_bboxes (bool): If True, assign colors for drawing bounding boxes on the image.</span>
<span class="sd"> use_gpu (bool): If True, try to load the model on GPU.</span>
<span class="sd"> """</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">weights_path</span><span class="p">,</span> <span class="n">configfile_path</span><span class="p">,</span> <span class="n">labels_path</span><span class="p">,</span>
<span class="n">confidence_threshold</span><span class="o">=</span><span class="mf">0.5</span><span class="p">,</span> <span class="n">nms_threshold</span><span class="o">=</span><span class="mf">0.2</span><span class="p">,</span> <span class="n">draw_bboxes</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">use_gpu</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="n">object_names</span> <span class="o">=</span> <span class="n">load_labelsjson</span><span class="p">(</span><span class="n">labels_path</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">pixel_mean</span> <span class="o">=</span> <span class="mf">127.5</span>
<span class="bp">self</span><span class="o">.</span><span class="n">pixel_std</span> <span class="o">=</span> <span class="mi">1</span><span class="o">/</span><span class="mf">127.5</span>
<span class="bp">self</span><span class="o">.</span><span class="n">image_size</span> <span class="o">=</span> <span class="p">(</span><span class="mi">300</span><span class="p">,</span> <span class="mi">300</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">net</span> <span class="o">=</span> <span class="n">cv</span><span class="o">.</span><span class="n">dnn</span><span class="o">.</span><span class="n">readNetFromCaffe</span><span class="p">(</span><span class="n">configfile_path</span><span class="p">,</span> <span class="n">weights_path</span><span class="p">)</span>
<span class="k">if</span> <span class="n">use_gpu</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">setPreferableBackend</span><span class="p">(</span><span class="n">cv</span><span class="o">.</span><span class="n">dnn</span><span class="o">.</span><span class="n">DNN_BACKEND_CUDA</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">setPreferableTarget</span><span class="p">(</span><span class="n">cv</span><span class="o">.</span><span class="n">dnn</span><span class="o">.</span><span class="n">DNN_TARGET_CUDA</span><span class="p">)</span>
<span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="n">object_names</span><span class="p">,</span> <span class="n">confidence_threshold</span><span class="p">,</span> <span class="n">nms_threshold</span><span class="p">,</span> <span class="n">draw_bboxes</span><span class="p">)</span>
<div class="viewcode-block" id="Caffe_SSDMobileNet.forward"><a class="viewcode-back" href="../../../includeme/apidocuments.html#motrackers.detectors.caffe.Caffe_SSDMobileNet.forward">[docs]</a> <span class="k">def</span> <span class="nf">forward</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">image</span><span class="p">):</span>
<span class="n">blob</span> <span class="o">=</span> <span class="n">cv</span><span class="o">.</span><span class="n">dnn</span><span class="o">.</span><span class="n">blobFromImage</span><span class="p">(</span><span class="n">image</span><span class="p">,</span> <span class="n">scalefactor</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">pixel_std</span><span class="p">,</span> <span class="n">size</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">image_size</span><span class="p">,</span>
<span class="n">mean</span><span class="o">=</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">pixel_mean</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">pixel_mean</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">pixel_mean</span><span class="p">),</span> <span class="n">swapRB</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">crop</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">setInput</span><span class="p">(</span><span class="n">blob</span><span class="p">)</span>
<span class="n">detections</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">net</span><span class="o">.</span><span class="n">forward</span><span class="p">()</span>
<span class="k">return</span> <span class="n">detections</span></div></div>
</pre></div>
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