(PECL imagick 2.2.3)
Imagick::orderedPosterizeImage — Performs an ordered dither
この関数は、 現在のところ詳細な情報はありません。引数のリストのみが 記述されています。
Performs an ordered dither based on a number of pre-defined dithering threshold maps, but over multiple intensity levels, which can be different for different channels, according to the input arguments.
A string containing the name of the threshold dither map to use
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Defaults to Imagick::CHANNEL_ALL. Refer to this list of channel constants.
成功した場合に TRUE を返します。
エラー時に ImagickException をスローします。