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Imagick::colorMatrixImage

(PECL imagick 3 >= 3.3.0)

Imagick::colorMatrixImageApply color transformation to an image

説明

public Imagick::colorMatrixImage(array $color_matrix = Imagick::CHANNEL_DEFAULT): bool

Apply 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)

パラメータ

color_matrix

戻り値

成功した場合に true を返します。

例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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