Imagick::convolveImage

(PECL imagick 2, PECL imagick 3)

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

說明

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

Applies a custom convolution kernel to the image.

參數(shù)

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

成功時返回 true。

錯誤／異常

錯誤時拋出 ImagickException。

范例

示例 #1 Imagick::convolveImage()


<?php
function 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();
}

?>