Hi, 

this is the first time I am usig the openCV library. I got the following piece of 
code from the openCV website

while I was dissecting the code, I am not able to understand two things.

1) If I increase the size to(1024, 768) or (800, 600) the framerate drops instantly to 
   less than half. (I checked the camera capture at 1024*768 works fine without the 
   face recognition.) 
2) Also the framerate drops, as soon as the faces are detected
   (Rectangle[] faces = opencv.detect();) is executed.

Can someone please help me out with this issue. 


Thanks in advance






import hypermedia.video.*; 
import java.awt.Rectangle; 

OpenCV opencv; void setup() { 

size( 320, 240 ); 
opencv = new OpenCV(this); 
opencv.capture( width, height ); 

opencv.cascade( OpenCV.CASCADE_FRONTALFACE_ALT ); 

 } 

void draw() { 

opencv.read(); 
image( opencv.image(), 0, 0 ); 

Rectangle[] faces = opencv.detect(); 

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 ); 
 
 } 
}