import hypermedia.video.*;



OpenCV opencv;

int w = 320;
int h = 240;
int threshold = 80;

boolean find=true;

PFont font;

void setup() {

   size( w*2+30, h*2+30 );

   opencv = new OpenCV( this );
   opencv.capture(w,h);
   
   font = loadFont( "AndaleMono.vlw" );
   textFont( font );

   println( "Drag mouse inside sketch window to change threshold" );
   println( "Press space bar to record background image" );

}



void draw() {

   background(0);
   opencv.read();
   //opencv.flip( OpenCV.FLIP_HORIZONTAL );

   image( opencv.image(), 10, 10 );                  // RGB image
   image( opencv.image(OpenCV.GRAY), 20+w, 10 );   // GRAY image
   image( opencv.image(OpenCV.MEMORY), 10, 20+h ); // image in memory

   opencv.absDiff();
   opencv.threshold(threshold);
   image( opencv.image(OpenCV.GRAY), 20+w, 20+h ); // absolute difference image


   // working with blobs
   Blob[] blobs = opencv.blobs( 100, w*h/3, 20, true );

   noFill();

   pushMatrix();
   translate(20+w,20+h);
   
   for( int i=0; i<blobs.length; i++ ) {

       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;

       // rectangle
       noFill();
       stroke( blobs[i].isHole 128 : 64 );
       rect( bounding_rect.x, bounding_rect.y, bounding_rect.width, bounding_rect.height );


       // centroid
       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(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 );

   }
   popMatrix();

}

void keyPressed() {
   if ( key==' ' ) opencv.remember();
}

void mouseDragged() {
   threshold = int( map(mouseX,0,width,0,255) );
}

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