(PECL imagick 2.0.0)
Imagick::addNoiseImage — Adds random noise to the image
$noise_type
[, int $channel = Imagick::CHANNEL_DEFAULT
] )Adds random noise to the image.
noise_type
The type of the noise. Refer to this list of noise constants.
channel
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channel constants using bitwise operators. 缺省为Imagick::CHANNEL_DEFAULT.
参考此 通道常数列表
成功时返回 TRUE .