(No version information available, might be only in CVS)
Imagick::contrastStretchImage — Enhances the contrast of a color image
This function is currently not documented; only its argument list is available.
Enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available
The black point.
The white point.
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Defaults to Imagick::CHANNEL_ALL. Refer to this list of channel constants.
Returns TRUE on success.