From times to times I have to know the width and height of images. I am using the following code:

UIImage *imageU = [UIImage imageWithContentsOfFile:[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"myImage.png"]];

CGFloat imageW = CGImageGetWidth(imageU.CGImage);
CGFloat imageH = CGImageGetHeight(imageU.CGImage);

My question is that if it is there any other way to know the width and height of an image, in pixels, without having to load the image on a variable, that's probably consuming memory. Can the dimensions be read from the file directly without loading the whole image?

thanks.