Upload New File

import java.io.File;

import java.io.FileWriter;

import java.awt.Color;

import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;

public class GetPixels {

   public static void main(String args[])throws Exception {

      FileWriter writer = new FileWriter("rgb_value.txt");

      //Reading the image

      File file= new File("foswiki.png");

      BufferedImage img = ImageIO.read(file);

      //Retrieving image width and height

      int width = img.getWidth();

      int height = img.getHeight();

      writer.write("Image Width: " + width + "\n");

      writer.write("Image Height: " + height + "\n");

      int red_c, green_c, blue_c;

      for (int y = 0; y < img.getHeight(); y++) {

         for (int x = 0; x < img.getWidth(); x++) {

            //Retrieving contents of a pixel

            int pixel = img.getRGB(x,y);

            //Creating a Color object from pixel value

            Color color = new Color(pixel, true);

            //Retrieving the R G B values scaled to 0 to 100

            int red = (int)((color.getRed() / 255.0) * 100);

            int green = (int)((color.getGreen() / 255.0) * 100);

            int blue = (int)((color.getBlue() / 255.0) * 100);

            //int red = color.getRed();

            //int green = color.getGreen();

            //int blue = color.getBlue();

            writer.append(red+":");

            writer.append(green+":");

            writer.append(blue+"");

            writer.append("\n");

            writer.flush();

         }

      }

      writer.close();

      System.out.println("RGB values at each pixel are stored in the specified file");

   }

}