How can you convert an image to ydbr format?

Hello all. I can not work out how to simply input an image and convert it to ycbr and save it as a new image.
Can anyone help please?
Kind Regards

OK I have also found this code:
public static void rgb2ycbcr(int r, int g, int b, int[] ycbcr) {
          int y = (int)( 0.299 * r + 0.587 * g + 0.114 * b);
          int cb = (int)(-0.16874 * r - 0.33126 * g + 0.50000 * b);
          int cr = (int)( 0.50000 * r - 0.41869 * g - 0.08131 * b);
          ycbcr[0] = y;
          ycbcr[1] = cb;
          ycbcr[2] = cr;
However I have no idea of how to use it. The source did not specify what all the parameters are. How can I use this in my code from a bufferedimage to displaying the new image?
Thanks again.
Looking forward to your answers (3 more Dukes added)

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How can you convert an image to ydbr format?

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