ace each pixel with its complementary color </td>
  </tr>

  <tr>
    <td><a href="command-line-options.html#noise">-noise <var>radius</var></a></td>
    <td>add or reduce noise in an image</td>
  </tr>

  <tr>
    <td><a href="command-line-options.html#normalize">-normalize</a></td>
    <td>transform image to span the full range of colors</td>
  </tr>

  <tr>
    <td><a href="command-line-options.html#opaque">-opaque <var>color</var></a></td>
    <td>change this color to the fill color</td>
  </tr>

  <tr>