Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import javax.imageio.ImageIO;

public class Main {
    public static byte[] getCompressedImage(byte[] rgb) {

        BufferedImage image;
        int width;
        int height;

        try {
            image = ImageIO.read(new ByteArrayInputStream(rgb));
            width = image.getWidth();
            height = image.getHeight();

            for (int i = 0; i < height; i++) {

                for (int j = 0; j < width; j++) {

                    Color c = new Color(image.getRGB(j, i));
                    int red = (int) (c.getRed() * 0.299);
                    int green = (int) (c.getGreen() * 0.587);
                    int blue = (int) (c.getBlue() * 0.114);
                    Color newColor = new Color(red + green + blue,

                            red + green + blue, red + green + blue);

                    image.setRGB(j, i, newColor.getRGB());
                }
            }

            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write(image, "jpg", baos);
            baos.flush();
            byte[] imageInByte = baos.toByteArray();
            baos.close();

            return imageInByte;

        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}