Imagick::colorMatrixImage
(PECL imagick 3 >= 3.3.0)
Imagick::colorMatrixImage — Description
Description
public Imagick::colorMatrixImage(array
$color_matrix = Imagick::CHANNEL_DEFAULT): boolApply color transformation to an image. The method permits saturation changes, hue rotation, luminance to alpha, and various other effects. Although variable-sized transformation matrices can be used, typically one uses a 5x5 matrix for an RGBA image and a 6x6 for CMYKA (or RGBA with offsets). The matrix is similar to those used by Adobe Flash except offsets are in column 6 rather than 5 (in support of CMYKA images) and offsets are normalized (divide Flash offset by 255)
Parameters
-
color_matrix -
Return Values
Returns true on success.
Examples
Example #1 Imagick::colorMatrixImage()
<?php
function colorMatrixImage($imagePath, $colorMatrix) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->setImageOpacity(1);
//A color matrix should look like:
// $colorMatrix = [
// 1.5, 0.0, 0.0, 0.0, 0.0, -0.157,
// 0.0, 1.0, 0.5, 0.0, 0.0, -0.157,
// 0.0, 0.0, 1.5, 0.0, 0.0, -0.157,
// 0.0, 0.0, 0.0, 1.0, 0.0, 0.0,
// 0.0, 0.0, 0.0, 0.0, 1.0, 0.0,
// 0.0, 0.0, 0.0, 0.0, 0.0, 1.0
// ];
$background = new \Imagick();
$background->newPseudoImage($imagick->getImageWidth(), $imagick->getImageHeight(), "pattern:checkerboard");
$background->setImageFormat('png');
$imagick->setImageFormat('png');
$imagick->colorMatrixImage($colorMatrix);
$background->compositeImage($imagick, \Imagick::COMPOSITE_ATOP, 0, 0);
header("Content-Type: image/png");
echo $background->getImageBlob();
}
?>
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