Produce histogram counts of image I.
The second argument can either be n, a scalar that specifies the number of bins; or cmap, a colormap in which case X is expected to be an indexed image. If not specified, n defaults to 2 for binary images, and 256 for grayscale images.
If output is requested, counts is the number of counts for each bin and
x is a range for the bins so that stem (x, counts) will
show the histogram.
Note: specially high peaks that may prevent an overview of the histogram
may not be displayed. To avoid this, use axis "auto y" after the call
to imhist.
See also: hist, histc, histeq.
Package: image