PHP Manual
GD and Image Functions
Makes the colors of the palette version of an image more closely match the true color version

imagecolormatch

(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)

imagecolormatch — Makes the colors of the palette version of an image more closely match the true color version

Description

imagecolormatch(GdImage $image1, GdImage $image2): true

Makes the colors of the palette version of an image more closely match the true color version.

Parameters

image1: A truecolor image object.
image2: A palette image object pointing to an image that has the same size as image1.

Return Values

Always returns true.

Changelog

Version	Description
8.0.0	`image1` and `image2` expect GdImage instances now; previously, resources were expected.

Examples

Example #1 imagecolormatch() example

<?php
// Setup the true color and palette images
$im1 = imagecreatefrompng('./gdlogo.png');
$im2 = imagecreate(imagesx($im1), imagesy($im1));

// Add some colors to $im2
$colors = Array();
$colors[] = imagecolorallocate($im2, 255, 36, 74);
$colors[] = imagecolorallocate($im2, 40, 0, 240);
$colors[] = imagecolorallocate($im2, 82, 100, 255);
$colors[] = imagecolorallocate($im2, 84, 63, 44);

// Match these colors with the true color image
imagecolormatch($im1, $im2);
?>