Imagick::getImageChannelRange

(PECL imagick 2.2.1)

Imagick::getImageChannelRange — Gets channel range

array Imagick::getImageChannelRange ( int $channel )

Gets the range for one or more image channels. This method is available if Imagick has been compiled against ImageMagick version 6.4.0 or newer.

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. Defaults to Imagick::CHANNEL_DEFAULT. Refer to this list of channel constants

Returns an array containing minima and maxima values of the channel(s).

Throws ImagickException on error.