title: Converting Bounding box regions into masks and saving them as PNG files
body: <p>I have a set of images with their bounding box values as shown below:</p>
  <pre><code>image_names class   xmin    xmax    ymin    ymax
  image1.png  1       260     361     45      184
  </code></pre>
  <p>I wish to convert these bounding box values into a mask having the bounding box dimensions and filled with white pixels and store the masks for each image in the format &quot;image1_mask.png&quot; and so on. Do we have predefined functions to do this?</p>