imagegammacorrect
imagegammacorrect
(PHP 4, PHP 5, PHP 7)
imagegammacorrect — Apply a gamma correction to a GD image
Description
bool imagegammacorrect ( resource $image , float $inputgamma , float $outputgamma )
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 $im = imagecreatefromgif('php.gif'); // Correct gamma, out = 1.537 imagegammacorrect($im, 1.0, 1.537); // Save and free image imagegif($im, './php_gamma_corrected.gif'); imagedestroy($im); ?>
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https://secure.php.net/manual/en/function.imagegammacorrect.php