How to convert a colored image to Sepia image using Java OpenCV library?

Algorithm to convert a colored image to sepia −

• Get the red green blue values of each pixel

• Get the average of these 3 colors.

• Define the depth and intensity values (ideally 20, and 30).

• Modify the values as −

  • red = red + (depth*2).

  • Green = green +depth.

  • blue = blue-intensity.

• Make sure that the modified values are between 0 to 255.

• Create a new pixel value from the modified colors and set the new value to the pixel.

Implementation in Java

• Read the required image using ImageIO.read() method.

• Get the height and width of the image.

• Using nested for loops traverse through each pixel in the image.

• Get the pixel value using the getRGB() method.

• Create a Color object by passing the above-retrieved pixel value as parameter.

• Get the red, green, blue values from the color object using the getRed(), getGreen() and getBlue() methods respectively.

• Calculate the new red, green and blue values as specified in the algorithm.

• Create a new pixel with the modified RGB values.

• Set the new pixel value(s) using the setRGB() method.

Example

import java.io.File;
import java.io.IOException;
import java.awt.Color;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
public class Color2Sepia {
   public static void main(String args[])throws IOException {
      //Reading the image
      File file= new File("D:\Images\cuba.jpg");
      BufferedImage img = ImageIO.read(file);
      for (int y = 0; y  255)red = 255;
            if (green > 255)green = 255;
            if (blue > 255)blue = 255;
            if (blue
Input
Output