Imagick::uniqueImageColorsImagick::unsharpMaskImage
(PECL imagick 2.0.0)
Imagick::unsharpMaskImage — Sharpens an image
설명
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.
인수
- radius
-
- sigma
-
- amount
-
- threshold
-
- channel
-
반환값
성공시에 TRUE를 반환합니다.
오류/예외
오류시에 ImagickException이 발생합니다.
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