the 'predominant color' of the neighborhood</td>
  </tr>

  <tr>
    <td><a href="command-line-options.html#modulate">-modulate <var>value</var></a></td>
    <td>vary the brightness, saturation, and hue</td>
  </tr>

  <tr>
    <td><a href="command-line-options.html#monitor">-monitor</a></td>
    <td>monitor progress</td>
  </tr>

  <tr>
    <td><a href="command-line-options.html#monochrome">-monochrome</a></td>
    <td>transform image to black and white</td>
  </tr>

  <tr>
    <td><a href="command-line-op