Grayscale colormap for contrast enhancement
Syntax
cmap = contrast(X)
cmap = contrast(X,m)
Description
The contrast function enhances the contrast of an image. It creates a new gray colormap, cmap, that has an approximately equal intensity distribution. All three elements in each row are identical.
cmap = contrast(X)
returns a gray colormap that is the same length as the current colormap.
cmap = contrast(X,m)
returns an m-by-3 gray colormap.
Examples
Add contrast to the clown image defined by X:
load clown;
cmap = contrast(X);
image(X);
colormap(cmap);
See Also
brighten, colormap, image
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