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Imagick::posterizeImage

(PECL imagick 2, PECL imagick 3)

Imagick::posterizeImage — Reduces the image to a limited number of color level

说明

public Imagick::posterizeImage(int $levels, bool $dither): bool

Reduces the image to a limited number of color level.

参数

levels

dither

返回值

成功时返回 true。

示例

示例 #1 Imagick::posterizeImage()

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

posterizeImage($imagePath, \Imagick::DITHERMETHOD_RIEMERSMA, 8);

?>