(PECL imagick 2, PECL imagick 3)
Imagick::getPixelRegionIterator — Get an ImagickPixelIterator for an image section
$x
,$y
,$columns
,$rows
Get an ImagickPixelIterator for an image section.
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.
Returns an ImagickPixelIterator for an image section.
Throws ImagickException on error.
Example #1 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");?>