MATLAB Functions

Brighten or darken colormap

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 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.