# Imagick::getPixelIterator

(PECL imagick 2, PECL imagick 3)

Imagick::getPixelIterator — Returns a MagickPixelIterator

### 说明

public Imagick::getPixelIterator(): ImagickPixelIterator

Returns a MagickPixelIterator.

### 参数

此函数没有参数。

### 返回值

Returns an ImagickPixelIterator on success.

### 错误／异常

错误时抛出 ImagickException。

### 示例

示例 #1 Imagick::getPixelIterator()

`<?php
function getPixelIterator($imagePath) {
$imagick = new \Imagick(realpath($imagePath));
$imageIterator = $imagick->getPixelIterator();
foreach ($imageIterator as $row => $pixels) { /* Loop through pixel rows */
foreach ($pixels as $column => $pixel) { /* Loop through the pixels in the row (columns) */
/** @var $pixel \ImagickPixel */
if ($column % 2) {
$pixel->setColor("rgba(0, 0, 0, 0)"); /* Paint every second pixel black*/
}
}
$imageIterator->syncIterator(); /* Sync the iterator, this is important to do on each iteration */
}
header("Content-Type: image/jpg");
echo $imagick;
}
?>`
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