(PECL imagick 2 >= 2.2.2, PECL imagick 3)
Imagick::orderedPosterizeImage — Performs an ordered dither
此函數在 Imagick 3.4.4 中被 廢棄，強烈建議不要應用此函數。
$threshold_map, int $channel = Imagick::CHANNEL_DEFAULT): boolPerforms an ordered dither based on a number of pre-defined dithering threshold maps, but over multiple intensity levels, which can be different for different channels, according to the input arguments. 此方法在Imagick基于ImageMagick 6.3.1以上版本編譯時(shí)可用。
threshold_mapA string containing the name of the threshold dither map to use
channelProvide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.
成功時(shí)返回 true。
錯誤時(shí)拋出 ImagickException。
示例 #1 Imagick::orderedPosterizeImage()
<?php
function orderedPosterizeImage($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');
?>