php man page for imagecolormatch

IMAGECOLORMATCH(3)							 1							IMAGECOLORMATCH(3)

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

SYNOPSIS
       bool imagecolormatch (resource  $image1, resource  $image2)

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

PARAMETERS
	      o $image1
		- A truecolor image link resource.

	      o $image2
		- A palette image link resource pointing to an image that has the same size as $image1.

RETURN VALUES
	Returns TRUE on success or FALSE on failure.

EXAMPLES
       Example #1

	      imagecolormatch(3) 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);

	      // Free from memory
	      imagedestroy($im1);
	      imagedestroy($im2);
	      ?>

NOTES
       Note

	      This function requires GD 2.0.1 or later (2.0.28 or later is recommended).

SEE ALSO
       imagecreatetruecolor(3).

PHP Documentation Group 													IMAGECOLORMATCH(3)