MATLAB Function Reference

brighten

Brighten or darken colormap

Syntax

• brighten(beta)
  brighten(h,beta)
  newmap = brighten(beta)
  newmap = brighten(cmap,beta)
  

Description

brighten increases or decreases the color intensities in a colormap. The modified colormap is brighter if 0 < beta < 1 and darker if -1 < beta < 0.

brighten(beta) replaces the current colormap with a brighter or darker colormap of essentially the same colors. brighten(beta), followed by brighten(-beta), where beta < 1, restores the original map.

brighten(h,beta) brightens all objects that are children of the figure having the handle h.

newmap = brighten(beta) returns a brighter or darker version of the current colormap without changing the display.

newmap = brighten(cmap,beta) returns a brighter or darker version of the colormap cmap without changing the display.

Examples

Brighten and then darken the current colormap:

• beta = .5; brighten(beta);
  beta = --.5; brighten(beta);
  

Algorithm

The values in the colormap are raised to the power of gamma, where gamma is

brighten has no effect on graphics objects defined with true color.

See Also

colormap, rgbplot

Color Operations for related functions

Altering Colormaps for more information

break

builtin