hi,

i"m trying to detect shapes with opencv and processing.
i just need to detect three distinct shapes. right now i run blob detection and check if a blob is within another blob using isHole. then if the blob is smaller than a certain area i call it shape A.

this is pretty messy, do you guys know of a better way out? i just need a way to distinguish between three distinct shapes of blobs.

here is my messy code:


////////////////////////////////////////

import hypermedia.video.*;

OpenCV opencv;
PImage zaz1, zaz2;

void setup() {
  size( 920, 600 );

  // open video stream
  opencv = new OpenCV( this );
  opencv.capture( 640, 480 );
zaz1 = loadImage("w1.gif");
zaz2 = loadImage("w2.gif");

}

void draw() {

background(255, 210, 0);

  opencv.read();           // grab frame from camera
  opencv.threshold(127);    // set black & white threshold


  // find blobs
 
Blob[] blobs = opencv.blobs( 10, width*height/2, 100, true, OpenCV.MAX_VERTICES*40 );

  // draw blob results

 for( int i=0; i<blobs.length; i++ ) {

   if(blobs[i].isHole && (blobs[i].area>=300))   {
                image(zaz1, (blobs[i]).centroid.x, (blobs[i]).centroid.y);
    }

/*  if(!(blobs[i].isHole) && (blobs[i].area>1200))   {
     
      image(zaz2, (blobs[i]).centroid.x, (blobs[i]).centroid.y);
 
     }
     
  */    
   
 }
}


//////////////////////////////////////////////////

please how can i get x,y,width,heigt of each blob ? i want to call a function with this variables i the main form and i don't know how can i get . Opencv class blob i work at c#.

how i tell the opencv blob :take the first blob olny ??

some advise al least