update : 2015.11.03
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Sets the image gamma
Gmagick
PHP Manual

Gmagick::setimagegamma

(PECL gmagick >= Unknown)

Gmagick::setimagegamma — Sets the image gamma

설명

public Gmagick Gmagick::setimagegamma ( float $gamma )

Sets the image gamma.

인수

gamma

The image gamma.

반환값

The Gmagick object on success

오류/예외

Throws an GmagickException on error.

Gmagick
PHP Manual