Hi,

Sorry for my english. I'm trying to code for a final project a Processing game with a moving 3D scenario from player's perspective using a webcam and face detection/tracking. I tested the example code at http://ubaa.net/shared/processing/opencv/opencv_detect.html with success but when I included the face tracking in the sketch where the OpenGL environment is, the FPS falls down from 40 to 7-8.

I read about using threads to solved this kind of issues, but I'm a newbie programmer and after hours of "test & error" I couldn't hit the nail on the head.

Has anyone done something similar? I paste below what is my incomplete attempt of the "opencv_detect" example implemented with threads. I have no idea how to display the camera image and draw the face rectangles on screen calling the detectFace class.

Thanks in advance!

Exequiel

1. import hypermedia.video.*;
   import java.awt.Rectangle;
   
   OpenCV opencv;
   
   detectFace detectthread;
   
   void setup() {
   
       size( 320, 240 );
       detectthread= new detectFace(this);
       detectthread.start();
   }
   
   void draw() {
      
       Rectangle[] faces =  detectthread.getRectangles();
       noFill();
       stroke(255,0,0);
       for( int i=0; i<faces.length; i++ ) {
           rect( faces[i].x, faces[i].y, faces[i].width, faces[i].height );
       }
   }
   

detectFace.java

1. import java.awt.Rectangle;
   import processing.core.PApplet;
   import hypermedia.video.*;
   
   public class detectFace extends Thread {
   
     private boolean running;         
     private OpenCV opencv;
     private PApplet parent;
     private Rectangle[] faces= new Rectangle[0];
   
     public detectFace (PApplet pa) {
       parent=pa;
       running = false;
     }
   
     public void start ()
     {
       running = true;
       opencv = new OpenCV(parent);
       opencv.capture(320, 240);
       opencv.cascade( OpenCV.CASCADE_FRONTALFACE_ALT );   
       super.start();
     }
   
     public Rectangle[] getRectangles() {
       return faces;
     }
   
     public void run ()
     {
           while (running) {
           opencv.read();
           Rectangle[] faces = opencv.detect( (float)1.2, 2, OpenCV.HAAR_DO_CANNY_PRUNING, 20, 20 );
           }
     }
   }