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pythia.utils.maskrcnn.html
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<section id="module-pythia.utils.maskrcnn">
<span id="pythia-utils-maskrcnn"></span><h1>pythia.utils.maskrcnn<a class="headerlink" href="#module-pythia.utils.maskrcnn" title="Permalink to this heading">#</a></h1>
<p>Simple python MASKRCNN output parser.</p>
<p>The function <cite>extract_maskrcnn_mask</cite> should be used.</p>
<p>The core function, <cite>resize_mask_vec</cite>, is based on its cpp counterpart
<cite>resizeMask</cite>, from deepstream cpp sources. It was ported to python
and vectorized via numpy to improve speed.</p>
<p>Author: <Pablo Woolvett <a class="reference external" href="mailto:pablowoolvett%40gmail.com">pablowoolvett<span>@</span>gmail<span>.</span>com</a>></p>
<dl class="py class">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn.DsBBox">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">pythia.utils.maskrcnn.</span></span><span class="sig-name descname"><span class="pre">DsBBox</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">args</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/pythia/utils/maskrcnn.html#DsBBox"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pythia.utils.maskrcnn.DsBBox" title="Permalink to this definition">#</a></dt>
<dd><p>Bases: <code class="xref py py-class docutils literal notranslate"><span class="pre">dict</span></code></p>
<p>Deepstream-style Bounding box.</p>
<dl class="py attribute">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn.DsBBox.height">
<span class="sig-name descname"><span class="pre">height</span></span><em class="property"><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="pre">float</span></em><a class="headerlink" href="#pythia.utils.maskrcnn.DsBBox.height" title="Permalink to this definition">#</a></dt>
<dd></dd></dl>
<dl class="py attribute">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn.DsBBox.left">
<span class="sig-name descname"><span class="pre">left</span></span><em class="property"><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="pre">float</span></em><a class="headerlink" href="#pythia.utils.maskrcnn.DsBBox.left" title="Permalink to this definition">#</a></dt>
<dd></dd></dl>
<dl class="py attribute">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn.DsBBox.top">
<span class="sig-name descname"><span class="pre">top</span></span><em class="property"><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="pre">float</span></em><a class="headerlink" href="#pythia.utils.maskrcnn.DsBBox.top" title="Permalink to this definition">#</a></dt>
<dd></dd></dl>
<dl class="py attribute">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn.DsBBox.width">
<span class="sig-name descname"><span class="pre">width</span></span><em class="property"><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="pre">float</span></em><a class="headerlink" href="#pythia.utils.maskrcnn.DsBBox.width" title="Permalink to this definition">#</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn._gen_clips">
<span class="sig-prename descclassname"><span class="pre">pythia.utils.maskrcnn.</span></span><span class="sig-name descname"><span class="pre">_gen_clips</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">width</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">original_width</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">height</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">original_height</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">Tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">ndarray</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">ndarray</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">ndarray</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">ndarray</span><span class="p"><span class="pre">]</span></span></span></span><a class="reference internal" href="_modules/pythia/utils/maskrcnn.html#_gen_clips"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pythia.utils.maskrcnn._gen_clips" title="Permalink to this definition">#</a></dt>
<dd></dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn._gen_idxs">
<span class="sig-prename descclassname"><span class="pre">pythia.utils.maskrcnn.</span></span><span class="sig-name descname"><span class="pre">_gen_idxs</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">original_width</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">left</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">right</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">top</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">bottom</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">Tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">ndarray</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">ndarray</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">ndarray</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">ndarray</span><span class="p"><span class="pre">]</span></span></span></span><a class="reference internal" href="_modules/pythia/utils/maskrcnn.html#_gen_idxs"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pythia.utils.maskrcnn._gen_idxs" title="Permalink to this definition">#</a></dt>
<dd></dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn._gen_ranges">
<span class="sig-prename descclassname"><span class="pre">pythia.utils.maskrcnn.</span></span><span class="sig-name descname"><span class="pre">_gen_ranges</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">original_height</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">original_width</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">target_height</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">target_width</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">int</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">Tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">ndarray</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">ndarray</span><span class="p"><span class="pre">]</span></span></span></span><a class="reference internal" href="_modules/pythia/utils/maskrcnn.html#_gen_ranges"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pythia.utils.maskrcnn._gen_ranges" title="Permalink to this definition">#</a></dt>
<dd></dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn._interpolate">
<span class="sig-prename descclassname"><span class="pre">pythia.utils.maskrcnn.</span></span><span class="sig-name descname"><span class="pre">_interpolate</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">width</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">left</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">height</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">top</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">left_top_val</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">right_top_val</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">left_bottom_val</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">right_bottom_val</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">ndarray</span></span></span><a class="reference internal" href="_modules/pythia/utils/maskrcnn.html#_interpolate"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pythia.utils.maskrcnn._interpolate" title="Permalink to this definition">#</a></dt>
<dd></dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn._take_vals">
<span class="sig-prename descclassname"><span class="pre">pythia.utils.maskrcnn.</span></span><span class="sig-name descname"><span class="pre">_take_vals</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">src</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">idxmats</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/pythia/utils/maskrcnn.html#_take_vals"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pythia.utils.maskrcnn._take_vals" title="Permalink to this definition">#</a></dt>
<dd></dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn.extract_maskrcnn_mask">
<span class="sig-prename descclassname"><span class="pre">pythia.utils.maskrcnn.</span></span><span class="sig-name descname"><span class="pre">extract_maskrcnn_mask</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">obj_meta</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">NvDsObjectMeta</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">ndarray</span></span></span><a class="reference internal" href="_modules/pythia/utils/maskrcnn.html#extract_maskrcnn_mask"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pythia.utils.maskrcnn.extract_maskrcnn_mask" title="Permalink to this definition">#</a></dt>
<dd><p>Extract maskrcnn mask from deepstream object.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>obj_meta</strong> – Deepstream object meta from detection.</p>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p>A 2d binary mask of np.uint8 valued 0 and 255.</p>
</dd>
</dl>
<p class="rubric">Example</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">obj_meta</span> <span class="o">=</span> <span class="n">pyds</span><span class="o">.</span><span class="n">NvDsObjectMeta</span><span class="o">.</span><span class="n">cast</span><span class="p">(</span><span class="o">...</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">mask</span> <span class="o">=</span> <span class="n">extract_maskrcnn_mask</span><span class="p">(</span><span class="n">obj_meta</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">mask</span><span class="o">.</span><span class="n">shape</span><span class="p">,</span> <span class="n">mask</span><span class="o">.</span><span class="n">dtype</span>
<span class="go">((300,100), dtype('uint8'))</span>
</pre></div>
</div>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<p><cite>resize_mask_vec</cite> for the internal implementation.</p>
</div>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn.polygon_to_bbox">
<span class="sig-prename descclassname"><span class="pre">pythia.utils.maskrcnn.</span></span><span class="sig-name descname"><span class="pre">polygon_to_bbox</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">polygons</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">List</span><span class="p"><span class="pre">[</span></span><span class="pre">List</span><span class="p"><span class="pre">[</span></span><span class="pre">int</span><span class="p"><span class="pre">]</span></span><span class="p"><span class="pre">]</span></span></span></em>, <em class="sig-param"><span class="n"><span class="pre">top</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">float</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">left</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">float</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><a class="reference internal" href="#pythia.utils.maskrcnn.DsBBox" title="pythia.utils.maskrcnn.DsBBox"><span class="pre">DsBBox</span></a></span></span><a class="reference internal" href="_modules/pythia/utils/maskrcnn.html#polygon_to_bbox"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pythia.utils.maskrcnn.polygon_to_bbox" title="Permalink to this definition">#</a></dt>
<dd><p>Generate bounding box from polygons.</p>
<p>The polygons are assumed to be relative to a mask.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>polygons</strong> – collection of polygons, where each polygon is a
sequence of the form ‘y0,x0,y1,x1,…,yn,xn’.</p></li>
<li><p><strong>top</strong> – top offset from the mask.</p></li>
<li><p><strong>left</strong> – left offset from the mask.</p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p>Bounding box which circumscribes the mask.</p>
</dd>
</dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="pythia.utils.maskrcnn.resize_mask_vec">
<span class="sig-prename descclassname"><span class="pre">pythia.utils.maskrcnn.</span></span><span class="sig-name descname"><span class="pre">resize_mask_vec</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">src</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">src_shape</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">int</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">int</span><span class="p"><span class="pre">]</span></span></span></em>, <em class="sig-param"><span class="n"><span class="pre">target_shape</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">Tuple</span><span class="p"><span class="pre">[</span></span><span class="pre">int</span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="pre">int</span><span class="p"><span class="pre">]</span></span></span></em>, <em class="sig-param"><span class="n"><span class="pre">threshold</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><span class="pre">float</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">→</span> <span class="sig-return-typehint"><span class="pre">ndarray</span></span></span><a class="reference internal" href="_modules/pythia/utils/maskrcnn.html#resize_mask_vec"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pythia.utils.maskrcnn.resize_mask_vec" title="Permalink to this definition">#</a></dt>
<dd><p>Resize mask from original deepstream object into numpy array.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>src</strong> – Mask array from deepstream object.</p></li>
<li><p><strong>src_shape</strong> – Shape of the original mask in (height,width) format.</p></li>
<li><p><strong>target_shape</strong> – Shape of the target mask in (height,width) format.</p></li>
<li><p><strong>threshold</strong> – Threshold for the mask.</p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p>A 2d binary mask of np.uint8 valued 0 and 255.</p>
</dd>
</dl>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<ul class="simple">
<li><dl class="simple">
<dt><cite>extract_maskrcnn_mask</cite> in this module for sample usage from</dt><dd><p>deepstream.</p>
</dd>
</dl>
</li>
<li><dl class="simple">
<dt><cite>resizeMask</cite> function at</dt><dd><p><cite>sample_apps/deepstream-mrcnn-app/deepstream_mrcnn_test.cpp</cite></p>
</dd>
</dl>
</li>
</ul>
</div>
</dd></dl>
</section>
</article>
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