Imagick::orderedPosterizeImage

(PECL imagick 2.2.2)

Imagick::orderedPosterizeImage — Performs an ordered dither

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

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. �˷�����Imagick����ImageMagick 6.3.1���ϰ汾����ʱ���á�

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threshold_map

A string containing the name of the threshold dither map to use

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.

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Example #1 Imagick::orderedPosterizeImage()

<?php
function orderedPosterizeImage($imagePath, $orderedPosterizeType) {
    $imagick = new \Imagick(realpath($imagePath));
    
  
    $imagick->orderedPosterizeImage($orderedPosterizeType);
    $imagick->setImageFormat('png');
    
    header("Content-Type: image/png");
    echo $imagick->getImageBlob();
}

//orderedPosterizeImage($imagePath, 'o4x4,3,3');
//orderedPosterizeImage($imagePath, 'o8x8,6,6');
orderedPosterizeImage($imagePath, 'h8x8a');





?>