Counting Pixels

I am using a buffered image and wish to count the pixels in the image to determine the most prominent colors. I have done some research and think i need to use the ColorModel class. If anyone could tell me how to implement this
and use the ColorModel class it would be greatly appreciated.
Thanks

the most prominent colors
By this do you mean the colors that occur with the highest frequency, colors with particular qualities, or specific/target colors?

I would like to obtain a count of the number of red blue and green colours

Code:

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import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;

public class ColorCount {
    public static void main(String[] args) throws IOException {
        String path = pathToImage
        BufferedImage image = ImageIO.read(new File(path));
        int redCount = 0, greenCount = 0, blueCount = 0;
        int red  = Color.red.getRGB();
        int green = Color.green.getRGB();
        int blue  = Color.blue.getRGB();
        System.out.printf("red = %d  green = %d  blue = %d%n",
                          red, green, blue);
        int w = image.getWidth();
        int h = image.getHeight();
        for(int y = 0; y < h; y++) {
            for(int x = 0; x < w; x++) {
                int pixel = image.getRGB(x, y);
                if(pixel == red)  redCount++;
                if(pixel == green) greenCount++;
                if(pixel == blue)  blueCount++;
            }
        }
        System.out.printf("redCount = %d  greenCount = %d  blueCount = %d%n",
                          redCount, greenCount, blueCount);
    }
}

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Thanks for the excellent help your code was very useful. Could you please explain what the following code does especially the role of "d" and "n".

("red = %d green = %d blue = %d%n",
red, green, blue);

Formatter class was introduced in j2se 1.5
d: format the value to an integer
n: new line.