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Region.html

Region.html 14 KB
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  8.     <title>Region &#8212; Image Features Extraction 1.0.0 documentation</title>
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    40. 

  40.             
    41. 

  41.   <h1>Source code for Region</h1><div class="highlight"><pre>
    42. 

  42. <span></span><span class="kn">from</span> <span class="nn">image_features_extraction</span> <span class="k">import</span> <span class="n">MyException</span>
    43. 

  43. 

  44. 

  45. <div class="viewcode-block" id="Region"><a class="viewcode-back" href="../code.html#Region.Region">[docs]</a><span class="k">class</span> <span class="nc">Region</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
    46. 

  46.     <span class="sd">&quot;&quot;&quot;</span>
    47. 

  47. <span class="sd">    Object refering to a single image region</span>
    48. 

  48. <span class="sd">    &quot;&quot;&quot;</span>
    49. 

  49.     <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">obj_region</span><span class="p">):</span>
    50. 

  50.         <span class="k">if</span> <span class="n">obj_region</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
    51. 

  51.             <span class="k">raise</span> <span class="n">MyException</span><span class="o">.</span><span class="n">MyException</span>
    52. 

  52.         <span class="bp">self</span><span class="o">.</span><span class="n">__obj_region</span> <span class="o">=</span> <span class="n">obj_region</span>
    53. 

  53. 

  54. 

  55. <div class="viewcode-block" id="Region.prop_value"><a class="viewcode-back" href="../code.html#Region.Region.prop_value">[docs]</a>    <span class="k">def</span> <span class="nf">prop_value</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">prop_name</span><span class="p">):</span>
    56. 

  56.         <span class="sd">&quot;&quot;&quot;</span>
    57. 

  57. <span class="sd">        Measure  the specified  property name (e.g., &#39;area&#39;)</span>
    58. 

  58. 

  59. <span class="sd">        :param prop_name: name of the property to measure (e.g, &#39;area&#39;)</span>
    60. 

  60. <span class="sd">        :type prop_name: string</span>
    61. 

  61. <span class="sd">        :returns: value of the property name</span>
    62. 

  62. <span class="sd">        :rtype: int,float,list</span>
    63. 

  63. 

  64. <span class="sd">        :example:</span>
    65. 

  65. <span class="sd">        &gt;&gt;&gt; import image_features_extraction as fe</span>
    66. 

  66. <span class="sd">        &gt;&gt;&gt; imgs = fe.Images(folder_name)</span>
    67. 

  67. <span class="sd">        &gt;&gt;&gt; img = imgs.item(1)</span>
    68. 

  68. <span class="sd">        &gt;&gt;&gt; regs = img.Regions()</span>
    69. 

  69. <span class="sd">        &gt;&gt;&gt; reg = regs.Region()</span>
    70. 

  70. <span class="sd">        &gt;&gt;&gt; area = reg.prop_value(&#39;area&#39;)</span>
    71. 

  71. 

  72. <span class="sd">        The following properties can be accessed as attributes or keys:</span>
    73. 

  73. 

  74. <span class="sd">        **area** : int</span>
    75. 

  75. <span class="sd">            Number of pixels of region.</span>
    76. 

  76. <span class="sd">        **bbox** : tuple</span>
    77. 

  77. <span class="sd">            Bounding box ``(min_row, min_col, max_row, max_col)``.</span>
    78. 

  78. <span class="sd">            Pixels belonging to the bounding box are in the half-open interval</span>
    79. 

  79. <span class="sd">            ``[min_row; max_row)`` and ``[min_col; max_col)``.</span>
    80. 

  80. <span class="sd">        **bbox_area** : int</span>
    81. 

  81. <span class="sd">            Number of pixels of bounding box.</span>
    82. 

  82. <span class="sd">        **centroid** : array</span>
    83. 

  83. <span class="sd">            Centroid coordinate tuple ``(row, col)``.</span>
    84. 

  84. <span class="sd">        **convex_area** : int</span>
    85. 

  85. <span class="sd">            Number of pixels of convex hull image.</span>
    86. 

  86. <span class="sd">        **convex_image** : (H, J) ndarray</span>
    87. 

  87. <span class="sd">            Binary convex hull image which has the same size as bounding box.</span>
    88. 

  88. <span class="sd">        **coords** : (N, 2) ndarray</span>
    89. 

  89. <span class="sd">            Coordinate list ``(row, col)`` of the region.</span>
    90. 

  90. <span class="sd">        **eccentricity** : float</span>
    91. 

  91. <span class="sd">            Eccentricity of the ellipse that has the same second-moments as the</span>
    92. 

  92. <span class="sd">            region. The eccentricity is the ratio of the focal distance</span>
    93. 

  93. <span class="sd">            (distance between focal points) over the major axis length.</span>
    94. 

  94. <span class="sd">            The value is in the interval [0, 1).</span>
    95. 

  95. <span class="sd">            When it is 0, the ellipse becomes a circle.</span>
    96. 

  96. <span class="sd">        **equivalent_diameter** : float</span>
    97. 

  97. <span class="sd">            The diameter of a circle with the same area as the region.</span>
    98. 

  98. <span class="sd">        **euler_number** : int</span>
    99. 

  99. <span class="sd">            Euler characteristic of region. Computed as number of objects (= 1)</span>
    100. 

  100. <span class="sd">            subtracted by number of holes (8-connectivity).</span>
    101. 

  101. <span class="sd">        **extent** : float</span>
    102. 

  102. <span class="sd">            Ratio of pixels in the region to pixels in the total bounding box.</span>
    103. 

  103. <span class="sd">            Computed as ``area / (rows * cols)``</span>
    104. 

  104. <span class="sd">        **filled_area** : int</span>
    105. 

  105. <span class="sd">            Number of pixels of filled region.</span>
    106. 

  106. <span class="sd">        **filled_image** : (H, J) ndarray</span>
    107. 

  107. <span class="sd">            Binary region image with filled holes which has the same size as</span>
    108. 

  108. <span class="sd">            bounding box.</span>
    109. 

  109. <span class="sd">        **image** : (H, J) ndarray</span>
    110. 

  110. <span class="sd">            Sliced binary region image which has the same size as bounding box.</span>
    111. 

  111. <span class="sd">        **inertia_tensor** : (2, 2) ndarray</span>
    112. 

  112. <span class="sd">            Inertia tensor of the region for the rotation around its mass.</span>
    113. 

  113. <span class="sd">        **inertia_tensor_eigvals** : tuple</span>
    114. 

  114. <span class="sd">            The two eigen values of the inertia tensor in decreasing order.</span>
    115. 

  115. <span class="sd">        **intensity_image** : ndarray</span>
    116. 

  116. <span class="sd">            Image inside region bounding box.</span>
    117. 

  117. <span class="sd">        **label** : int</span>
    118. 

  118. <span class="sd">            The label in the labeled input image.</span>
    119. 

  119. <span class="sd">        **local_centroid** : array</span>
    120. 

  120. <span class="sd">            Centroid coordinate tuple ``(row, col)``, relative to region bounding</span>
    121. 

  121. <span class="sd">            box.</span>
    122. 

  122. <span class="sd">        **major_axis_length** : float</span>
    123. 

  123. <span class="sd">            The length of the major axis of the ellipse that has the same</span>
    124. 

  124. <span class="sd">            normalized second central moments as the region.</span>
    125. 

  125. <span class="sd">        **max_intensity** : float</span>
    126. 

  126. <span class="sd">            Value with the greatest intensity in the region.</span>
    127. 

  127. <span class="sd">        **mean_intensity** : float</span>
    128. 

  128. <span class="sd">            Value with the mean intensity in the region.</span>
    129. 

  129. <span class="sd">        **min_intensity** : float</span>
    130. 

  130. <span class="sd">            Value with the least intensity in the region.</span>
    131. 

  131. <span class="sd">        **minor_axis_length** : float</span>
    132. 

  132. <span class="sd">            The length of the minor axis of the ellipse that has the same</span>
    133. 

  133. <span class="sd">            normalized second central moments as the region.</span>
    134. 

  134. <span class="sd">        **moments** : (3, 3) ndarray</span>
    135. 

  135. <span class="sd">            Spatial moments up to 3rd order::</span>
    136. 

  136. <span class="sd">                m_ji = sum{ array(x, y) * x^j * y^i }</span>
    137. 

  137. <span class="sd">            where the sum is over the `x`, `y` coordinates of the region.</span>
    138. 

  138. <span class="sd">        **moments_central** : (3, 3) ndarray</span>
    139. 

  139. <span class="sd">            Central moments (translation invariant) up to 3rd order::</span>
    140. 

  140. <span class="sd">                mu_ji = sum{ array(x, y) * (x - x_c)^j * (y - y_c)^i }</span>
    141. 

  141. <span class="sd">            where the sum is over the `x`, `y` coordinates of the region,</span>
    142. 

  142. <span class="sd">            and `x_c` and `y_c` are the coordinates of the region&#39;s centroid.</span>
    143. 

  143. <span class="sd">        **moments_hu** : tuple</span>
    144. 

  144. <span class="sd">            Hu moments (translation, scale and rotation invariant).</span>
    145. 

  145. <span class="sd">        **moments_normalized** : (3, 3) ndarray</span>
    146. 

  146. <span class="sd">            Normalized moments (translation and scale invariant) up to 3rd order::</span>
    147. 

  147. <span class="sd">                nu_ji = mu_ji / m_00^[(i+j)/2 + 1]</span>
    148. 

  148. <span class="sd">            where `m_00` is the zeroth spatial moment.</span>
    149. 

  149. <span class="sd">        **orientation** : float</span>
    150. 

  150. <span class="sd">            Angle between the X-axis and the major axis of the ellipse that has</span>
    151. 

  151. <span class="sd">            the same second-moments as the region. Ranging from `-pi/2` to</span>
    152. 

  152. <span class="sd">            `pi/2` in counter-clockwise direction.</span>
    153. 

  153. <span class="sd">        **perimeter** : float</span>
    154. 

  154. <span class="sd">            Perimeter of object which approximates the contour as a line</span>
    155. 

  155. <span class="sd">            through the centers of border pixels using a 4-connectivity.</span>
    156. 

  156. <span class="sd">        **solidity** : float</span>
    157. 

  157. <span class="sd">            Ratio of pixels in the region to pixels of the convex hull image.</span>
    158. 

  158. <span class="sd">        **weighted_centroid** : array</span>
    159. 

  159. <span class="sd">            Centroid coordinate tuple ``(row, col)`` weighted with intensity</span>
    160. 

  160. <span class="sd">            image.</span>
    161. 

  161. <span class="sd">        **weighted_local_centroid** : array</span>
    162. 

  162. <span class="sd">            Centroid coordinate tuple ``(row, col)``, relative to region bounding</span>
    163. 

  163. <span class="sd">            box, weighted with intensity image.</span>
    164. 

  164. <span class="sd">        **weighted_moments** : (3, 3) ndarray</span>
    165. 

  165. <span class="sd">            Spatial moments of intensity image up to 3rd order::</span>
    166. 

  166. <span class="sd">                wm_ji = sum{ array(x, y) * x^j * y^i }</span>
    167. 

  167. <span class="sd">            where the sum is over the `x`, `y` coordinates of the region.</span>
    168. 

  168. <span class="sd">        **weighted_moments_central** : (3, 3) ndarray</span>
    169. 

  169. <span class="sd">            Central moments (translation invariant) of intensity image up to</span>
    170. 

  170. <span class="sd">            3rd order::</span>
    171. 

  171. <span class="sd">                wmu_ji = sum{ array(x, y) * (x - x_c)^j * (y - y_c)^i }</span>
    172. 

  172. <span class="sd">            where the sum is over the `x`, `y` coordinates of the region,</span>
    173. 

  173. <span class="sd">            and `x_c` and `y_c` are the coordinates of the region&#39;s weighted</span>
    174. 

  174. <span class="sd">            centroid.</span>
    175. 

  175. <span class="sd">        **weighted_moments_hu** : tuple</span>
    176. 

  176. <span class="sd">            Hu moments (translation, scale and rotation invariant) of intensity</span>
    177. 

  177. <span class="sd">            image.</span>
    178. 

  178. <span class="sd">        **weighted_moments_normalized** : (3, 3) ndarray</span>
    179. 

  179. <span class="sd">            Normalized moments (translation and scale invariant) of intensity</span>
    180. 

  180. <span class="sd">            image up to 3rd order::</span>
    181. 

  181. <span class="sd">                wnu_ji = wmu_ji / wm_00^[(i+j)/2 + 1]</span>
    182. 

  182. <span class="sd">            where ``wm_00`` is the zeroth spatial moment (intensity-weighted area).</span>
    183. 

  183. <span class="sd">        &quot;&quot;&quot;</span>
    184. 

  184.         <span class="k">try</span><span class="p">:</span>
    185. 

  185.             <span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">__obj_region</span><span class="p">,</span> <span class="n">prop_name</span><span class="p">)</span>
    186. 

  186.         <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
    187. 

  187.             <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>
    188. 

  188.             <span class="k">return</span> <span class="kc">None</span></div></div>
    189. 

  189. </pre></div>
    190. 

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    196. 

  196. <h1 class="logo"><a href="../index.html">Image Features Extraction</a></h1>
    197. 

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  203. 

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