Performs an ordered dither

(PECL imagick 2.2.2)

Imagick::orderedPosterizeImagePerforms an ordered dither


bool Imagick::orderedPosterizeImage ( string $threshold_map [, int $channel = Imagick::CHANNEL_ALL ] )

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. Этот метод доступен, если Imagick был скомпилирован с версией ImageMagick 6.3.1 или старше.

Список параметров


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. Refer to this list of channel constants.

Возвращаемые значения

В случае успешной работы возвращает TRUE.


Вызывает ImagickException при ошибке.


Пример #1 Imagick::orderedPosterizeImage()

function orderedPosterizeImage($imagePath$orderedPosterizeType) {
$imagick = new \Imagick(realpath($imagePath));
header("Content-Type: image/png");

//orderedPosterizeImage($imagePath, 'o4x4,3,3');
//orderedPosterizeImage($imagePath, 'o8x8,6,6');