dia.org/wiki/Channel_(digital_image)">channels</a>
in <i>image</i>.  Grayscale images have one channel, whereas RGB
images have three.</p>

<hr>

<p><a name="image-bit-depth"><i>Function</i> <b>IMAGE-BIT-DEPTH</b></a>

<p><b>Syntax:</b>
<p><b>image-bit-depth</b> <i>image</i> => <i>bit-depth</i>

<p><b>Arguments and Values:</b>
<p><i>image</i>---an <a href="#image"><b>image</b></a>
<p><i>bit-depth</i>---either 8 or 16

<p><b>Description:</b> <p>Returns the bit-depth of the image, i.e.,
the number of bits in 