colored object tracking in java- javacv code

Code for this demo video - Color Based Image Segmentation to Track Path of Moving Object


Working Source Code :

import static com.googlecode.javacv.cpp.opencv_core.IPL_DEPTH_8U;
import static com.googlecode.javacv.cpp.opencv_core.cvCreateImage;
import static com.googlecode.javacv.cpp.opencv_core.cvFlip;
import static com.googlecode.javacv.cpp.opencv_core.cvGetSize;
import static com.googlecode.javacv.cpp.opencv_core.cvInRangeS;
import static com.googlecode.javacv.cpp.opencv_core.cvScalar;
import static com.googlecode.javacv.cpp.opencv_imgproc.CV_BGR2GRAY;
import static com.googlecode.javacv.cpp.opencv_imgproc.CV_MEDIAN;
import static com.googlecode.javacv.cpp.opencv_imgproc.cvCvtColor;
import static com.googlecode.javacv.cpp.opencv_imgproc.cvEqualizeHist;
import static com.googlecode.javacv.cpp.opencv_imgproc.cvGetCentralMoment;
import static com.googlecode.javacv.cpp.opencv_imgproc.cvGetSpatialMoment;
import static com.googlecode.javacv.cpp.opencv_imgproc.cvMoments;
import static com.googlecode.javacv.cpp.opencv_imgproc.cvSmooth;
import static com.googlecode.javacv.cpp.opencv_highgui.*;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;

import javax.swing.JPanel;

import com.googlecode.javacv.CanvasFrame;
import com.googlecode.javacv.FrameGrabber;
import com.googlecode.javacv.VideoInputFrameGrabber;
import com.googlecode.javacv.cpp.opencv_core.CvScalar;
import com.googlecode.javacv.cpp.opencv_core.IplImage;
import com.googlecode.javacv.cpp.opencv_imgproc.CvMoments;

public class ColoredObjectTrack implements Runnable {
    final int INTERVAL = 1000;// 1sec
    final int CAMERA_NUM = 0; // Default camera for this time

Mouse Gesture Recognition Using Hidden Markov Model - Java Source Code

Hi everyone, I have uploaded the codes for my project - "Mouse Gesture Recognition with Hidden Markov Model - Java".

You can find it @ google code : https://code.google.com/p/mouse-gesture-recognition-java-hidden-markov-model/.

This svn repository @ google code contains eclipse source code (VQ and HMM codes from OCVolume Project.) , trained hmm models and codebook, captured data for few gestures.

Similar codes for Speech Recognition System using HMM/VQ + MFCC will be uploaded SOON.

DEMO VIDEO: http://www.youtube.com/watch?v=0CNJ2fCj4xQ

maven install jar to repository locally

Run the following command to install the "MyJar-x.x.x.jar" into Local maven repository. The underlined  values vary in your case.

mvn install:install-file -Dfile=PathOFJar_MyJar-x.x.x.jar -DgroupId=com.mycompany -DartifactId=myJar -Dversion=x.x.x -Dpackaging=jar

After installing, Add the dependency into Pom.xml :

        <dependency>
            <groupId>com.mycompany</groupId>
            <artifactId>myJar</artifactId>
            <version>x.x.x</version>
        </dependency>

Java grey image from RGB image convert full source code

The java code below is for making grey image from a image

public static void main(String[] args) {
        BufferedImage org = getImage("test.jpg");
        BufferedImage greyImage = getGrayScaleAvg(org);
        new ImageFrame(org, "Original");
        new ImageFrame(greyImage, "After GrayScale");
    }

Full working source code : averages the pixels to obtain grey image

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

public class tempgrey {
    public static void main(String[] args) {
        BufferedImage org = getImage("test.jpg");//valid input image
        BufferedImage greyImage = getGrayScaleAvg(org);
        new ImageFrame(org, "Original");
        new ImageFrame(greyImage, "After GrayScale");
    }

    public static BufferedImage getImage(String imageName) {
        try {
            File input = new File(imageName);
            BufferedImage image = ImageIO.read(input);
            return image;

java servlet/jsp download string into text file - spring controller method

Working example for downloading a text file out of a String . Code segment in Spring MVC controller .

 @RequestMapping(value = "/download", method = RequestMethod.GET)
 public @ResponseBody
 void downloadFile(HttpServletResponse resp) {
  String downloadFileName= "download.txt";
  String downloadStringContent="Download text \n This is working.";
  try {
   OutputStream out = resp.getOutputStream();
   resp.setContentType("text/plain; charset=utf-8");
   resp.addHeader("Content-Disposition","attachment; filename=\"" + downloadFileName + "\"");
   out.write(downloadStringContent.getBytes(Charset.forName("UTF-8")));
   out.flush();
   out.close();

  } catch (IOException e) {
  }
 }