Imagick::sharpenImage

(PECL imagick 2.0.0)

Imagick::sharpenImage — Sharpens an image

说明

bool Imagick::sharpenImage ( float $radius , float $sigma [, int $channel = Imagick::CHANNEL_ALL ] )

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。