Php/docs/imagick.sharpenimage

• PHP Manual
• Imagick
• Sharpens an image

Imagick::sharpenImage

(PECL imagick 2, PECL imagick 3)

Imagick::sharpenImage — Sharpens 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

Example #1 Imagick::sharpenImage()

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