Dear all interested readers,


I am making a blob detection sketch using the wonderfull OPENCV library. What I want now, is to label each blob with a number. How can I add this label?

This is the code I have now

1. import hypermedia.video.*;
   import java.awt.*;
   import processing.video.*; 
   
   int counter;
   Capture myCapture; 
   OpenCV opencv;
   String[] captureDevices; 
   
   int w = 320;
   int h = 240;
   int threshold = 80;
   
   boolean find=true;
   
   PFont font;
   
   void setup() {
   
     size(w*3, h*3 );
   
     opencv = new OpenCV( this );
     opencv.capture(width, height);
     println (Capture.list()); 
   
   
     captureDevices = Capture.list(); 
   
     myCapture = new Capture(this, width, height, 30); 
     font = loadFont( "AndaleMono.vlw" );
     textFont( font );
   
   
     opencv = new OpenCV(this);
     opencv.allocate(width, height);
     //opencv.cascade( OpenCV.CASCADE_FRONTALFACE_ALT );
   }
   
   
   
   void draw() {
     background(0);
   
   
     if (myCapture.available()) { 
       myCapture.read(); 
       opencv.copy(myCapture); 
       image(opencv.image(), 0, 0, width, height);
   
       opencv.absDiff();
       opencv.threshold(threshold);
   
       Blob[] blobs = opencv.blobs( 100, w*h, 20, true );
   
       noFill();
   
       pushMatrix();
   
       for ( int i=0; i<blobs.length; i++ ) {
   
         if (i > blobs.length) {  //When "i" is less than "35"...
           counter = 0;
         }
        
        
   
   
   
   
         Rectangle bounding_rect    = blobs[i].rectangle;
         float area = blobs[i].area;
         float circumference = blobs[i].length;
         Point centroid = blobs[i].centroid;
         Point[] points = blobs[i].points;
   
         noFill();
         // stroke( blobs[i].isHole ? 128 : 64 );
         rect( bounding_rect.x, bounding_rect.y, bounding_rect.width, bounding_rect.height );
   
         stroke(0, 0, 255);
         line( centroid.x-5, centroid.y, centroid.x+5, centroid.y );
         line( centroid.x, centroid.y-5, centroid.x, centroid.y+5 );
         noStroke();
         fill(0, 0, 255);
         text( area, centroid.x+5, centroid.y+5 );
   
   
         fill(40, 300, 20);
         rect(centroid.x, centroid.y, bounding_rect.width, bounding_rect.height);
   
   
         fill(255, 0, 255, 64);
         stroke(255, 0, 255);
         if ( points.length>0 ) {
           beginShape();
           for ( int j=0; j<points.length; j++ ) {
             vertex( points[j].x, points[j].y );
           }
           endShape(CLOSE);
         }
   
   
   
         noStroke();
         fill(255, 0, 255);
         text( circumference, centroid.x+5, centroid.y+15 );
         fill(255, 0, 0);
   
         text( counter, centroid.x+5, centroid.y+15 );
   
   
         fill(255, 255, 255);
       }
       popMatrix();
     }
   }
   
   
   void keyPressed() {
     if ( key==' ' ) opencv.remember();
   }
   
   void mouseDragged() {
     threshold = int( map(mouseX, 0, width, 0, 255) );
   }
   
   public void stop() {
     opencv.stop();
     super.stop();
   }