Imagick::unsharpMaskImage

(PECL imagick 2.0.0)

Imagick::unsharpMaskImage — Sharpens an image

Opis

bool Imagick::unsharpMaskImage ( float $radius , float $sigma , float $amount , float $threshold [, 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, radius should be larger than sigma. Use a radius of 0 and Imagick::UnsharpMaskImage() selects a suitable radius for you.

Parametry

radius
sigma
amount
threshold
channel

Zwracane wartości

Zwraca TRUE w przypadku sukcesu.

Błędy/Wyjątki

Zgłasza wyjątek ImagickException w przypadku błędu.

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