Php/docs/function.imagegammacorrect
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imagegammacorrect
(PHP 4, PHP 5, PHP 7)
imagegammacorrect — Apply a gamma correction to a GD image
Description
imagegammacorrect
( resource $image
, float $inputgamma
, float $outputgamma
) : bool
Applies gamma correction to the given gd image
given an input and an output gamma.
Parameters
image- An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
inputgamma- The input gamma.
outputgamma- The output gamma.
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 imagegammacorrect() usage
<?php// Create image instance$im = imagecreatefromgif('php.gif');// Correct gamma, out = 1.537imagegammacorrect($im, 1.0, 1.537);// Save and free imageimagegif($im, './php_gamma_corrected.gif');imagedestroy($im);?>
