hello dear community


I'm working on a face substitution program using OpenCv and as i'm new on Processing , i need some help

For the start i used the example of tracking of the OpenCv library  http://ubaa.net/shared/processing/opencv/

This program detect the face and then it show a picture over this face.A random pictures should appear each time the program detect a new face and show it until the face disapear but now it show a random picture on each draw loop and i don't see how can i change this , i've tried differents methods but i always arrived at quite the same result.

so i'm sure that one of this great community could be able to help me , here is my code :



import hypermedia.video.*;


PImage[] images = new PImage[13];
OpenCV opencv;

// contrast/brightness values
int contrast_value    = 0;
int brightness_value  = 0;




void setup() {

   //size( 500, 375 );
   size(640,480);

   opencv = new OpenCV( this );
   opencv.capture( width , height );                   // open video stream
   opencv.cascade( OpenCV.CASCADE_FRONTALFACE_ALT );  // load detection description, here-> front face detection : "haarcascade_frontalface_alt.xml"


   // print usage
   println( "Drag mouse on X-axis inside this sketch window to change contrast" );
   println( "Drag mouse on Y-axis inside this sketch window to change brightness" );
   
   
   //chargement des images
   images[0] = loadImage("face1.gif");
   images[1] = loadImage("face2.gif");
   images[2] = loadImage("face3.gif");
   images[3] = loadImage("face4.gif");
   images[4] = loadImage("face5.gif");
   images[5] = loadImage("face6.gif");
   images[6] = loadImage("face7.gif");
   images[7] = loadImage("face8.gif");
   images[8] = loadImage("face9.gif");
   images[9] = loadImage("face10.gif");
   images[10] = loadImage("face11.gif");
   images[11] = loadImage("face12.gif");
   images[12] = loadImage("face13.gif");
   
}


public void stop() {
   opencv.stop();
   super.stop();
}



void draw() {
   background(0);
   
   // grab a new frame
       opencv.read();
   
   // and convert to gray
   //opencv.convert( GRAY );
   
   // flip horizontally
   opencv.flip( OpenCV.FLIP_HORIZONTAL );
 
   opencv.contrast( contrast_value );
   opencv.brightness( brightness_value );

   // proceed detection
   Rectangle[] faces = opencv.detect( 1.2, 2, OpenCV.HAAR_DO_CANNY_PRUNING, 20, 20 );

   // display the image
   image( opencv.image(), 0, 0 );

   // draw face area(s)
   noFill();
   stroke(255,0,0);
   int index = int(random(images.length));
   for( int i=0; i<faces.length; i++ ) {
       
       rectMode(CENTER);
       //rect( faces[i].x, faces[i].y, faces[i].width, faces[i].height );
       image (images[index],faces[i].x, faces[i].y, faces[i].width, faces[i].height );
       
 }
 println(frameRate);
}



/**
* Changes contrast/brigthness values
*/
void mouseDragged() {
   contrast_value   = (int) map( mouseX, 0, width, -128, 128 );
   brightness_value = (int) map( mouseY, 0, width, -128, 128 );
}



also i'm sure it could be improved (automatic filling for the " images" array and performance), or if the images used where smaller will it change something ?  

if u have an idea plz help a noob

Hi rubix i m looking at a similar area,
but i want face tracking to detect a face and then 'highlight' that face as a detected part of the camera
then it s feed to the display- the second part NO PROBLEM but the first half im new to processing

any ideas??thanks