Php/docs/imagick.colormatriximage
Imagick::colorMatrixImage
(PECL imagick 3 >= 3.3.0)
Imagick::colorMatrixImage — Description
说明
public Imagick::colorMatrixImage
( array $color_matrix = Imagick::CHANNEL_DEFAULT
) : bool
Apply color transformation to an image. The method permits saturation changes, hue rotation, luminance to alpha, and various other effects. Although variable-sized transformation matrices can be used, typically one uses a 5x5 matrix for an RGBA image and a 6x6 for CMYKA (or RGBA with offsets). The matrix is similar to those used by Adobe Flash except offsets are in column 6 rather than 5 (in support of CMYKA images) and offsets are normalized (divide Flash offset by 255)
参数
color_matrix
返回值
成功时返回 true。
范例
Example #1 Imagick::colorMatrixImage()
<?phpfunction colorMatrixImage($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();}?>
