MATLAB Function Reference

contrast

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

Colormaps for related functions

contourslice

conv

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