# 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);
?>`
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