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How to set and get the values of pixels in a BufferedImage |
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This Java tip demonstrates how to get and set pixels in a buffered image. The pixels
can be retrieved by using getRGB() function. Further, for setting the pixels setRGB()
function may be used.
// Firstly get a pixel (x.y may be defined by the developer)
int rgb = bufferedImage.getRGB(x, y);
// Developer may get all the pixels
int w = bufferedImage.getWidth(null);
int h = bufferedImage.getHeight(null);
int[] rgbs = new int[w*h];
bufferedImage.getRGB(0, 0, w, h, rgbs, 0, w);
// Secondly set a pixel
rgb = 0xFF00FF00; // green
bufferedImage.setRGB(x, y, rgb);
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