 mathematics on an image sequence</td>
  </tr>

  <tr>
    <td><a href="command-line-options.html#connected-components">-connected-components <var>connectivity</var></a></td>
    <td>connected-components uniquely labeled, choose from 4 or 8 way connectivity</td>
  </tr>

  <tr>
    <td><a href="command-line-options.html#contrast-stretch">-contrast-stretch <var>geometry</var></a></td>
    <td>improve the contrast in an image by `stretching' the range of intensity value</td>
  </tr>

  <tr>
    <td><a href="c