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<li class="toctree-l1"><a class="reference internal" href="filtering.html">Filtering images</a></li>
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<section id="main-module">
<h1>main module<a class="headerlink" href="#main-module" title="Permalink to this heading">#</a></h1>
<p>Main file of the project, contains filtering and stl generation functions</p>
<dl class="py class">
<dt class="sig sig-object py" id="main.fingerprint_app">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">fingerprint_app</span></span><a class="headerlink" href="#main.fingerprint_app" title="Permalink to this definition">#</a></dt>
<dd><p>Main class for the application.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.__init__">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">__init__</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.__init__" title="Permalink to this definition">#</a></dt>
<dd></dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.parse_arguments">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">parse_arguments</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.parse_arguments" title="Permalink to this definition">#</a></dt>
<dd><p>Parse arguments from command line using argparse library.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.parse_stl">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">parse_stl</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.parse_stl" title="Permalink to this definition">#</a></dt>
<dd><p>Parse arguments for stl generation.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.run_filtering">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">run_filtering</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.run_filtering" title="Permalink to this definition">#</a></dt>
<dd><p>Read input file, store as numpy.array, uint8, grayscale.
Call function to apply the filters and a function to save it to output file.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.get_empty_figure">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">get_empty_figure</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.get_empty_figure" title="Permalink to this definition">#</a></dt>
<dd><p>Return empty figure with one ax, which has dimensions of the input image.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.mirror_image">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">mirror_image</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.mirror_image" title="Permalink to this definition">#</a></dt>
<dd><p>Mirror image using opencv.
Should be used to cancel implicit mirroring.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.apply_filters">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">apply_filters</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.apply_filters" title="Permalink to this definition">#</a></dt>
<dd><p>Apply filters to image one by one.
In case none were given, pass and save original image to the output file.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.save_image">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">save_image</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.save_image" title="Permalink to this definition">#</a></dt>
<dd><p>Save processed image to the output file.</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>fig</strong> figure used to render image.</p></li>
<li><p><strong>ax</strong> Ax used to render image.</p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.run_stl">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">run_stl</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.run_stl" title="Permalink to this definition">#</a></dt>
<dd><p>Choose correct generation code based on mode.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.prepare_heightmap">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">prepare_heightmap</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.prepare_heightmap" title="Permalink to this definition">#</a></dt>
<dd><p>Scale image values to get values from 0 to 255.
Check validity of dimension parameters.
Then compute base and papilar lines height.
Prepare meshgrid, array which later serves to store point coordinates.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.write_stl_header">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">write_stl_header</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.write_stl_header" title="Permalink to this definition">#</a></dt>
<dd><p>Write parameter string to stl header.
This header is 80 bytes long, so the data needs to be shortened to fit.
If the parameter string is too long, a warning is printed and the data is truncated.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.get_ID">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">get_ID</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.get_ID" title="Permalink to this definition">#</a></dt>
<dd><p>Get a unique ID for the model, which is used in filename and on the model backside.
Also create parameter string for stl header, which is used to create ID using hash function MD5.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.append_faces">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">append_faces</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.append_faces" title="Permalink to this definition">#</a></dt>
<dd><p>Add faces to the list of faces.</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>faces</strong> Array with faces.</p></li>
<li><p><strong>c</strong> Indices of currently added faces.</p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.engrave_text">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">engrave_text</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.engrave_text" title="Permalink to this definition">#</a></dt>
<dd><p>Engrave text on the back of the model.
Create an empty image, fill it with color and draw text on it.</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>bottom_vert_arr</strong> Bottom vertex array.</p></li>
<li><p><strong>top_vert_arr</strong> Top vertex array</p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.create_stl_mesh">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">create_stl_mesh</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.create_stl_mesh" title="Permalink to this definition">#</a></dt>
<dd><p>Create mesh from faces and vertices arrays.</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>faces</strong> Vector of face indices</p></li>
<li><p><strong>vertices</strong> Vector of vertices</p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.create_faces">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">create_faces</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.create_faces" title="Permalink to this definition">#</a></dt>
<dd><p>Create faces for the model.
Iterate over all vertices, append to vector and create faces from indices.</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>bottom_vert_arr</strong> Bottom vertex array.</p></li>
<li><p><strong>top_vert_arr</strong> Top vertex array</p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.make_stl_planar">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">make_stl_planar</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.make_stl_planar" title="Permalink to this definition">#</a></dt>
<dd><p>Create vertices from meshgrid, add z coordinates from processed image heightmap.
Create faces from vertex indices.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.make_stl_curved">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">make_stl_curved</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.make_stl_curved" title="Permalink to this definition">#</a></dt>
<dd><p>Compute curved surface offset.
Create vertices from meshgrid, add z coordinates from processed image heightmap.
Create faces from vertex indices.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.make_stl_map">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">make_stl_map</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.make_stl_map" title="Permalink to this definition">#</a></dt>
<dd><p>Map fingerprint to a given finger model.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="main.save_stl">
<span class="sig-prename descclassname"><span class="pre">main.</span></span><span class="sig-name descname"><span class="pre">save_stl</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#main.save_stl" title="Permalink to this definition">#</a></dt>
<dd><p>Save final mesh to stl file.</p>
</dd></dl>
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<ul>
<li><a class="reference internal" href="#">main module</a><ul>
<li><a class="reference internal" href="#main.fingerprint_app"><code class="docutils literal notranslate"><span class="pre">main.fingerprint_app</span></code></a></li>
<li><a class="reference internal" href="#main.__init__"><code class="docutils literal notranslate"><span class="pre">main.__init__()</span></code></a></li>
<li><a class="reference internal" href="#main.parse_arguments"><code class="docutils literal notranslate"><span class="pre">main.parse_arguments()</span></code></a></li>
<li><a class="reference internal" href="#main.parse_stl"><code class="docutils literal notranslate"><span class="pre">main.parse_stl()</span></code></a></li>
<li><a class="reference internal" href="#main.run_filtering"><code class="docutils literal notranslate"><span class="pre">main.run_filtering()</span></code></a></li>
<li><a class="reference internal" href="#main.get_empty_figure"><code class="docutils literal notranslate"><span class="pre">main.get_empty_figure()</span></code></a></li>
<li><a class="reference internal" href="#main.mirror_image"><code class="docutils literal notranslate"><span class="pre">main.mirror_image()</span></code></a></li>
<li><a class="reference internal" href="#main.apply_filters"><code class="docutils literal notranslate"><span class="pre">main.apply_filters()</span></code></a></li>
<li><a class="reference internal" href="#main.save_image"><code class="docutils literal notranslate"><span class="pre">main.save_image()</span></code></a></li>
<li><a class="reference internal" href="#main.run_stl"><code class="docutils literal notranslate"><span class="pre">main.run_stl()</span></code></a></li>
<li><a class="reference internal" href="#main.prepare_heightmap"><code class="docutils literal notranslate"><span class="pre">main.prepare_heightmap()</span></code></a></li>
<li><a class="reference internal" href="#main.write_stl_header"><code class="docutils literal notranslate"><span class="pre">main.write_stl_header()</span></code></a></li>
<li><a class="reference internal" href="#main.get_ID"><code class="docutils literal notranslate"><span class="pre">main.get_ID()</span></code></a></li>
<li><a class="reference internal" href="#main.append_faces"><code class="docutils literal notranslate"><span class="pre">main.append_faces()</span></code></a></li>
<li><a class="reference internal" href="#main.engrave_text"><code class="docutils literal notranslate"><span class="pre">main.engrave_text()</span></code></a></li>
<li><a class="reference internal" href="#main.create_stl_mesh"><code class="docutils literal notranslate"><span class="pre">main.create_stl_mesh()</span></code></a></li>
<li><a class="reference internal" href="#main.create_faces"><code class="docutils literal notranslate"><span class="pre">main.create_faces()</span></code></a></li>
<li><a class="reference internal" href="#main.make_stl_planar"><code class="docutils literal notranslate"><span class="pre">main.make_stl_planar()</span></code></a></li>
<li><a class="reference internal" href="#main.make_stl_curved"><code class="docutils literal notranslate"><span class="pre">main.make_stl_curved()</span></code></a></li>
<li><a class="reference internal" href="#main.make_stl_map"><code class="docutils literal notranslate"><span class="pre">main.make_stl_map()</span></code></a></li>
<li><a class="reference internal" href="#main.save_stl"><code class="docutils literal notranslate"><span class="pre">main.save_stl()</span></code></a></li>
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