Imagick::getImageChannelDepth
Imagick::getImageChannelExtrema
The Imagick class
PHP Manual

# Imagick::getImageChannelDistortion

(PECL imagick 2.0.0)

Imagick::getImageChannelDistortion — Compares image channels of an image to a reconstructed image

### 설명

float Imagick::getImageChannelDistortion ( Imagick `$reference` , int `$channel` , int `$metric` )
Warning

이 함수는 현재 문서화 되어있지 않습니다; 인수 목록만을 제공합니다.

Compares one or more image channels of an image to a reconstructed image and returns the specified distortion metric.

### 인수

`reference`

  Imagick object to compare to.

`channel`

  Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Defaults to `Imagick::CHANNEL_ALL`. Refer to this list of channel constants.

`metric`

  One of the metric type constants.

### 반환값

성공시에 `TRUE`를 반환합니다.

### 오류/예외

오류시에 ImagickException이 발생합니다.

Imagick::getImageChannelDepth
Imagick::getImageChannelExtrema
The Imagick class
PHP Manual