han the number of channels,
the extra elements are ignored without warning (default: 0).</p></dd>


<dt id="arg-up">up<a class="anchor" aria-label="anchor" href="#arg-up"></a></dt>
<dd><p>A vector indicating the inclusive upper end of the thresholding
range. Itcan have as many elements as the number of channels in the image.
If it has less elements than the number of channels, it is recycled to match
the number of channels. If it has more elements than the number of channels,
the extra elements are ignored 