Php/docs/imagick.convolveimage

• PHP Manual
• Imagick
• Applies a custom convolution kernel to the image

Imagick::convolveImage

(PECL imagick 2, PECL imagick 3)

Imagick::convolveImage — Applies a custom convolution kernel to the image

说明

public Imagick::convolveImage ( array $kernel [, int $channel = Imagick::CHANNEL_DEFAULT ] ) : bool

Applies a custom convolution kernel to the image.

参数

kernel

The convolution kernel

channel

Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.

返回值

成功时返回 true。

错误／异常

错误时抛出 ImagickException。

范例

Example #1 Imagick::convolveImage()

<?phpfunction convolveImage($imagePath, $bias, $kernelMatrix) {    $imagick = new \Imagick(realpath($imagePath));        //$edgeFindingKernel = [-1, -1, -1, -1, 8, -1, -1, -1, -1,];    $imagick->setImageBias($bias * \Imagick::getQuantum());    $imagick->convolveImage($kernelMatrix);    header("Content-Type: image/jpg");    echo $imagick->getImageBlob();}?>