# Imagick::setSamplingFactors

(PECL imagick 2, PECL imagick 3)

Imagick::setSamplingFactors — Sets the image sampling factors

### 说明

public Imagick::setSamplingFactors(array `$factors`): bool

Sets the image sampling factors.

### 参数

`factors`

### 返回值

成功时返回 `true`。

### 示例

示例 #1 Imagick::setSamplingFactors()

`<?php
function setSamplingFactors($imagePath) {
$imagePath = "../imagick/images/FineDetail.png";
$imagick = new \Imagick(realpath($imagePath));
$imagick->setImageFormat('jpg');
$imagick->setSamplingFactors(array('2x2', '1x1', '1x1'));
$compressed = $imagick->getImageBlob();
$reopen = new \Imagick();
$reopen->readImageBlob($compressed);
$reopen->resizeImage(
$reopen->getImageWidth() * 4,
$reopen->getImageHeight() * 4,
\Imagick::FILTER_POINT,
1
);
header("Content-Type: image/jpg");
echo $reopen->getImageBlob();
}
?>`
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