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ImageFeatrueExtraction


			
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  <h1>Source code for Images</h1><div class="highlight"><pre>
<span></span><span class="ch">#!/usr/bin/env python3</span>

<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">from</span> <span class="nn">image_features_extraction</span> <span class="k">import</span> <span class="n">Image</span>
<span class="kn">from</span> <span class="nn">image_features_extraction</span> <span class="k">import</span> <span class="n">my_iterator</span>
<span class="kn">from</span> <span class="nn">image_features_extraction</span> <span class="k">import</span> <span class="n">MyException</span>


<div class="viewcode-block" id="Images"><a class="viewcode-back" href="../code.html#Images.Images">[docs]</a><span class="k">class</span> <span class="nc">Images</span><span class="p">(</span><span class="n">my_iterator</span><span class="o">.</span><span class="n">my_iterator</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">    This class loads a collection of images for extraction of features </span>

<span class="sd">    :param  folder_name: folder containing images</span>
<span class="sd">    :type folder_name: string</span>
<span class="sd">    :param  image_file_ext: images file extensions (default=[&#39;tif&#39;,&#39;tiff&#39;])</span>
<span class="sd">    :type folder_name: List of strings</span>
<span class="sd">    :returns: an instance of the object Images</span>
<span class="sd">    :rtype: object</span>
<span class="sd">    :example:</span>
<span class="sd">    &gt;&gt;&gt; import image_features_extraction as fe</span>
<span class="sd">    &gt;&gt;&gt; imgs = fe.Images(&#39;my_folder&#39;, image_file_ext=[&#39;tif&#39;,&#39;tiff&#39;,&#39;jpeg&#39;])</span>
<span class="sd">    &gt;&gt;&gt; num_images = imgs.count()</span>
<span class="sd">    &quot;&quot;&quot;</span>

    <span class="c1"># to implement the class as a collection this object inherits the abstract class my_iterator</span>
    <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">folder_name</span><span class="p">,</span> <span class="n">image_file_ext</span><span class="o">=</span><span class="p">[</span><span class="s1">&#39;tif&#39;</span><span class="p">,</span> <span class="s1">&#39;tiff&#39;</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="c1">#self.__iterator_init__()  # initializes my_iterator</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">__folder_name</span> <span class="o">=</span> <span class="n">folder_name</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">__image_file_ext</span> <span class="o">=</span> <span class="n">image_file_ext</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">__dicfiles</span> <span class="o">=</span> <span class="p">[]</span>
        <span class="k">try</span><span class="p">:</span>
            <span class="c1"># load the files image into a list</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">__load</span><span class="p">()</span>
        <span class="k">except</span> <span class="n">MyException</span><span class="o">.</span><span class="n">MyException</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
            <span class="nb">print</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">args</span><span class="p">)</span>


    <span class="k">def</span> <span class="nf">__load</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        load the files image into a list</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="c1"># check that the folder exists</span>
        <span class="k">if</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">isdir</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">__folder_name</span><span class="p">)</span> <span class="o">==</span> <span class="kc">False</span><span class="p">:</span>
            <span class="k">raise</span> <span class="n">MyException</span><span class="o">.</span><span class="n">MyException</span><span class="p">(</span><span class="s2">&quot;Error: folder name does not exist&quot;</span><span class="p">)</span>
        <span class="c1"># store the file names</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">__dicfiles</span> <span class="o">=</span> <span class="p">[]</span>
        <span class="n">files</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">listdir</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">__folder_name</span><span class="p">)</span>
        <span class="k">for</span> <span class="n">f</span> <span class="ow">in</span> <span class="n">files</span><span class="p">:</span>
            <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">__is_imagefile</span><span class="p">(</span><span class="n">f</span><span class="p">):</span>
                <span class="bp">self</span><span class="o">.</span><span class="n">__dicfiles</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">f</span><span class="p">)</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">count_update</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">__dicfiles</span><span class="p">))</span>


    <span class="k">def</span> <span class="nf">__is_imagefile</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">file_name</span><span class="p">):</span>
        <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        checks that the file is an image</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="c1"># check the extension of the file</span>
        <span class="n">ext0</span> <span class="o">=</span> <span class="n">file_name</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">&quot;.&quot;</span><span class="p">)[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span>
        <span class="k">for</span> <span class="n">ext1</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__image_file_ext</span><span class="p">:</span>
            <span class="k">if</span> <span class="n">ext1</span> <span class="o">==</span> <span class="n">ext0</span><span class="p">:</span>
                <span class="k">return</span> <span class="kc">True</span>
        <span class="k">return</span> <span class="kc">False</span>


<div class="viewcode-block" id="Images.item"><a class="viewcode-back" href="../code.html#Images.Images.item">[docs]</a>    <span class="k">def</span> <span class="nf">item</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">i</span><span class="p">):</span>
        <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        returns the i-th image</span>

<span class="sd">        :param i: the i-th image</span>
<span class="sd">        :type i: int</span>
<span class="sd">        :returns: :class:`Image`</span>
<span class="sd">        :rtype: object</span>
<span class="sd">        :example:</span>
<span class="sd">        &gt;&gt;&gt; import image_features_extraction as fe</span>
<span class="sd">        &gt;&gt;&gt; imgs = fe.Images(folder_name)</span>
<span class="sd">        &gt;&gt;&gt; img = imgs.item(1)</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="k">try</span><span class="p">:</span>
            <span class="k">if</span> <span class="n">i</span> <span class="o">&gt;=</span> <span class="bp">self</span><span class="o">.</span><span class="n">count</span><span class="p">():</span>
                <span class="k">raise</span> <span class="n">MyException</span><span class="o">.</span><span class="n">MyException</span><span class="p">(</span><span class="s2">&quot;error: index out of bound&quot;</span><span class="p">)</span>
            <span class="k">return</span> <span class="n">Image</span><span class="o">.</span><span class="n">Image</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</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">__folder_name</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">__dicfiles</span><span class="p">[</span><span class="n">i</span><span class="p">]))</span>
        <span class="k">except</span> <span class="n">MyException</span><span class="o">.</span><span class="n">MyException</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
            <span class="nb">print</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">args</span><span class="p">)</span></div></div>
</pre></div>

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