Imagick::gammaImage
(No version information available, might be only in CVS)
Imagick::gammaImage — Gamma-corrects an image
Description
bool Imagick::gammaImage
( float $gamma
[, int $channel
] )
WarningThis function is
currently not documented; only its argument list is available.
Gamma-corrects an image. The same image viewed on different devices will
have perceptual differences in the way the image's intensities are
represented on the screen. Specify individual gamma levels for the red,
green, and blue channels, or adjust all three with the gamma parameter.
Values typically range from 0.8 to 2.3.
Parameters
-
gamma
-
The amount of gamma-correction.
-
channel
-
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.
Return Values
Returns TRUE on success.
Errors/Exceptions
Throws ImagickException on error.
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