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imagegammacorrect

PHP function Edit on GitHub ✎

(PHP 4, PHP 5, PHP 7, PHP 8)

Apply a gamma correction to a GD image

Description

imagegammacorrect(GdImage $image, float $input_gamma, float $output_gamma): true

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

Parameters

input_gamma: The input gamma.
output_gamma: The output gamma.

Return Values

Always

Changelog

Version	Description

Examples

imagegammacorrect() usage

php

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

// Correct gamma, out = 1.537
imagegammacorrect($im, 1.0, 1.537);

// Save
imagegif($im, './php_gamma_corrected.gif');
?>

Source: reference/image/functions/imagegammacorrect.xml · from the official PHP manual (php/doc-en)