imhist - Display histogram of image data
Syntax
imhist(I)
imhist(I, n)
imhist(X, map)
[counts,x] = imhist(...)
Description
imhist(I) displays a histogram for the
image I above a grayscale colorbar. The number
of bins in the histogram is specified by the image type. If I is
a grayscale image, imhist uses a default value
of 256 bins. If I is a binary image, imhist uses
two bins.
imhist(I, n) displays a histogram where n specifies
the number of bins used in the histogram. n also
specifies the length of the colorbar. If I is a binary image, n can
only have the value 2.
imhist(X, map) displays a histogram for
the indexed image X. This histogram shows the distribution
of pixel values above a colorbar of the colormap map.
The colormap must be at least as long as the largest index in X.
The histogram has one bin for each entry in the colormap.
[counts,x] = imhist(...) returns the histogram
counts in counts and the bin locations in x so
that stem(x,counts) shows the histogram. For indexed
images, imhist returns the histogram counts for
each colormap entry; the length of counts is the
same as the length of the colormap.
Class Support
An input intensity image can be of class uint8, uint16, int16, single, double,
or logical. An input indexed image can be of class uint8, uint16, single, double,
or logical.
Examples
I = imread('pout.tif');
imhist(I)
See Also
histeq
hist in the MATLAB Function
Reference
 | imhandles | | imhmax |  |
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