Imagick::orderedPosterizeImage

(PECL imagick 2 >= 2.2.2, PECL imagick 3)

Imagick::orderedPosterizeImage — Performs an ordered dither

警告

此函數(shù)在 Imagick 3.4.4 中被廢棄，強(qiáng)烈建議不要應(yīng)用此函數(shù)。

說(shuō)明

public 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. 此方法在Imagick基于ImageMagick 6.3.1以上版本編譯時(shí)可用。

參數(shù)

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.

返回值

成功時(shí)返回 true。

錯(cuò)誤／異常

錯(cuò)誤時(shí)拋出 ImagickException。

范例

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');





?>