Imagick::sharpenImage

(PECL imagick 2, PECL imagick 3)

Imagick::sharpenImageSharpens an image

说明

public Imagick::sharpenImage(float $radius, float $sigma, int $channel = Imagick::CHANNEL_DEFAULT): bool

Sharpens an image. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, the radius should be larger than sigma. Use a radius of 0 and Imagick::sharpenImage() selects a suitable radius for you.

参数

radius

sigma

channel

返回值

成功时返回 true

范例

示例 #1 Imagick::sharpenImage()

<?php
function sharpenImage($imagePath$radius$sigma$channel) {
    
$imagick = new \Imagick(realpath($imagePath));
    
$imagick->sharpenimage($radius$sigma$channel);
    
header("Content-Type: image/jpg");
    echo 
$imagick->getImageBlob();
}

?>