imagegammacorrect
(PHP 4, PHP 5)
imagegammacorrect — Apply a gamma correction to a GD image
Beskrivelse
bool imagegammacorrect
( resource
$image
, float $inputgamma
, float $outputgamma
)
Applies gamma correction to the given gd image
given an input and an output gamma.
Parametre
-
image -
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
-
inputgamma -
The input gamma.
-
outputgamma -
The output gamma.
Returnerings Værdier
Returns TRUE on success or FALSE on failure.
Eksempler
Eksempel #1 imagegammacorrect() usage
<?php
// Create image instance
$im = imagecreatefromgif('php.gif');
// Correct gamma, out = 1.537
imagegammacorrect($im, 1.0, 1.537);
// Save and free image
imagegif($im, './php_gamma_corrected.gif');
imagedestroy($im);
?>
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