(PECL imagick 2, PECL imagick 3)
Imagick::getImageChannelExtrema — Gets the extrema for one or more image channels
This function has been DEPRECATED as of Imagick 3.4.4. Relying on this function is highly discouraged.
public Imagick::getImageChannelExtrema ( int $channel ) : array
Gets the extrema for one or more image channels. Return value is an associative array with the keys "minima" and "maxima".
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. Refer to this list of channel constants.
Returns true on success.
Throws ImagickException on error.
© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/imagick.getimagechannelextrema.php