(PECL imagick 2.0.0)
Imagick::setImageGamma — Sets the image gamma
$gamma
Sets the image gamma.
gamma
锟缴癸拷时锟斤拷锟斤拷 TRUE锟斤拷
TRUE
锟斤拷锟斤拷时锟阶筹拷 ImagickException锟斤拷