Imagick::sharpenImage

(PECL imagick 2.0.0)

Imagick::sharpenImage — Sharpens an image

说明

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

Example #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();
}

?>