PHP Unconference Europe 2015

imagegammacorrect

(PHP 4, PHP 5)

imagegammacorrectApply a gamma correction to a GD image

Descrição

bool imagegammacorrect ( resource $image , float $inputgamma , float $outputgamma )

Applies gamma correction to the given gd image given an input and an output gamma.

Parâmetros

image

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

inputgamma

The input gamma.

outputgamma

The output gamma.

Valor Retornado

Retorna TRUE em caso de sucesso ou FALSE em caso de falha.

Exemplos

Exemplo #1 imagegammacorrect() usage

<?php
// Create image instance
$im imagecreatefromgif('php.gif');

// Correct gamma, out = 1.537
imagegammacorrect($im1.01.537);

// Save and free image
imagegif($im'./php_gamma_corrected.gif');
imagedestroy($im);
?>

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