age">image<a class="anchor" aria-label="anchor" href="#arg-image"></a></dt>
<dd><p>An <code><a href="Image-class.html">Image</a></code> object.</p></dd>


<dt id="arg-low">low<a class="anchor" aria-label="anchor" href="#arg-low"></a></dt>
<dd><p>A vector indicating the inclusive lower end of the thresholding
range. It can 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 t