Imagick::uniqueImageColors
Imagick::valid
The Imagick class
PHP Manual

# Imagick::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 ] )
Warning

이 함수는 현재 문서화 되어있지 않습니다; 인수 목록만을 제공합니다.

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 `TRUE`를 반환합니다.

### 오류/예외

오류시에 ImagickException이 발생합니다.

Imagick::uniqueImageColors
Imagick::valid
The Imagick class
PHP Manual