GetColorModel

// This method returns the color model of an image
public static ColorModel getColorModel(Image image) {
    // If buffered image, the color model is readily available
    if (image instanceof BufferedImage) {
        BufferedImage bimage = (BufferedImage)image;
        return bimage.getColorModel();
    }

    // Use a pixel grabber to retrieve the image's color model;
    // grabbing a single pixel is usually sufficient
     PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
     try {
         pg.grabPixels();
     } catch (InterruptedException e) {
     }
    ColorModel cm = pg.getColorModel();
    return cm;
}

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