autoscale=(ih: ImageRGB_t; value: string)</a></li>
  <li><a class="reference" href="#autoscale%3D%2CImageRGB_t%2Cbool"
    title="autoscale=(ih: ImageRGB_t; yes: bool)">autoscale=(ih: ImageRGB_t; yes: bool)</a></li>

  </ul>
  <ul class="simple nested-toc-section">bgcolor
      <li><a class="reference" href="#bgcolor%2CImageRGB_t"
    title="bgcolor(ih: ImageRGB_t): string">bgcolor(ih: ImageRGB_t): string</a></li>
  <li><a class="reference" href="#bgcolor%2CImageRGB_t%2Cint%2Cint%2Cint%2Cint"
    title="bgc