Imagick::getPixelRegionIterator

Get an ImagickPixelIterator for an image section

&reftitle.description; public `ImagickPixelIterator` `Imagick::getPixelRegionIterator` `int` `x` `int` `y` `int` `columns` `int` `rows`

Get an ImagickPixelIterator for an image section.

&reftitle.parameters;

`x`

- The x-coordinate of the region.

`y`

- The y-coordinate of the region.

`columns`

- The width of the region.

`rows`

- The height of the region.

&reftitle.returnvalues;

Returns an ImagickPixelIterator for an image section.

&reftitle.errors;

&imagick.imagick.throws;

&reftitle.examples;

### `Imagick::getPixelRegionIterator` example

Iterate over the pixels in the top left of the image, changing them to be black.

    <?php
    $im = new Imagick(realpath("./testImage.png"));
    $areaIterator = $im->getPixelRegionIterator(0, 0, 10, 10);

    foreach ($areaIterator as $rowIterator) {
        foreach ($rowIterator as $pixel) {
            // Paint every pixel black
            $pixel->setColor("rgba(0, 0, 0, 0)");
        }
        $areaIterator->syncIterator();
    }
    $im->writeImage("./output.png");
    ?>