Store image in an 2D array

[zenitis]

I ve got a jpg image. I want to store the RGB values in an array. I found

Image img = null;
 img = ImageIO.read(new File("C:/Users/zenitis/Desktop/right brainers/sike1.jpg"));
int w = img.getWidth(null);
int h = img.getHeight(null);
int[] pixels = new int[w * h];
PixelGrabber pg = new PixelGrabber(img, 0, 0, w, h, pixels, 0, w);

this command. I wandering what it returns me in pixels array? Has anyone idea about how can i store an image to array?

[Tolls]

Use a BufferedImage (that's what that read returns) which will allow you to find out what the type of the image is (RGB, ARGB, etc etc), which will tell you what the format of those ints is for each pixel.

[zenitis]

I got finally i use this

String temp = Integer.toString(pixels[i]);
int red = Color.decode(temp).getRed();
int blue = Color.decode(temp).getBlue();
int green = Color.decode(temp).getGreen();

It retunrs me the RGB values.

[JosAH]

There is no need to take the path int --> String --> Color --> int. You can create a Color object given the pixel value directly:

Color temp= new Color(pixels[i]);
int red= temp.getRed();
int green= temp.getGreen();
int blue= temp.getBlue();

You can even do without creating a temporary Color object by using a bit of bit fiddling ...

kind regards,

Jos

[Tolls]

Surely that only works with RGB?
If the image is in any other format then it won't work, and you'll end up with funky results.

[quad64bit]

Buffered is really the way to go, as people have said. A buffered image is already pretty much a 2d array with color values, hence it's MASSIVE memory requirement. If the only thing you need are the pixel color values, you can grab those directly from the buffered image. Really no need to copy the color data into an actual array, even if you plan to manipulate it. You can do all of that directly to a bufferedImage!