SaveImage.java

// ********************************************************

// Example : saving an image from file

// Author : Toby Breckon, toby.breckon@durham.ac.uk

// Copyright (c) 2015 Durham University
// License : LGPL - http://www.gnu.org/licenses/lgpl.html

// ********************************************************

// import required OpenCV components

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfInt;
import org.opencv.imgproc.Imgproc;
import org.opencv.highgui.Highgui;

// ********************************************************

public class SaveImage { 
	
	public static void main(String[] args) {

    // load the Core OpenCV library by name

    System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
	
    // load an image from file (read and decode JPEG file)

    Mat inputImg = Highgui.imread("files/lena.jpg");
    
    // create an output object
    
    Mat outputImg = new Mat();
    
    // invert the image
    
    Core.bitwise_not(inputImg, outputImg);
       
    // write image to file (first setting up the compression quality to use)

    MatOfInt params = new MatOfInt();
    params.fromArray(new int []{Highgui.CV_IMWRITE_JPEG_QUALITY, 75, 0 });
    
    System.out.println( "Saving image to file ...." );
    
    Highgui.imwrite("files/lena_inverted.jpg", outputImg, params);
    
    }
}

// ********************************************************