Imagick::resize

public function resize(Rectangle $source, Rectangle $destination)
{
	if($this->image === null)
	{
		return false;
	}

	//need crop
	if($source->getX() <> 0 || $source->getY() <> 0)
	{
		$this->crop($source);
	}

	//hope Imagick will use the best filter automatically
	$filter = Imagick::FILTER_UNDEFINED;

	foreach ($this->image as $frame)
	{
		//resizeImage has better quality than scaleImage (scaleImage uses a filter similar to FILTER_BOX)
		$frame->resizeImage($destination->getWidth(), $destination->getHeight(), $filter, 1);
	}

	return true;
}