import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;

import javax.imageio.ImageIO;
import javax.swing.SingleSelectionModel;

public class mean7x7 {




	public static void  meanFilter(BufferedImage img ) throws IOException{
		int avg1=0;
		int avg2=0;
		int avg3=0;




		for (int i = 3;i<img.getWidth()-3;i++){
			for (int j=3;j<img.getHeight()-3;j++){
			for (int k=i-3;k<i+4;k++){
				for (int l=j-3;l<i+4;l++){

				Color c = new Color(img.getRGB(k,l));
				avg1+= c.getRed();
				avg2+=c.getGreen();
				avg3+=c.getBlue();
			}

				}
			avg1=avg1/49;
            avg2=avg2/49;
            avg3=avg3/49;

			img.setRGB(i,j,new Color(avg1,avg2,avg3).getRGB());
			avg1=0;
            avg2=0;
            avg3=0;
			}

		}
		File File = new File ("butterfly_22476-copy.png");
		ImageIO.write(img, "png", File);

	}
	public static void main (String [] args) throws IOException {
		BufferedImage img=ImageIO.read (new File ("butterfly_22476.png"));

		meanFilter(img);
	}
}