I'm trying to implement a billateral filter using openCV library, but cant´figure the way the paramters work

and it seems the documentation does not fits with the implementation.

2. import hypermedia.video.*;
3. OpenCV opencv;
4. 
   
5. void setup() {
6.   opencv = new OpenCV(this);
7.   opencv.allocate(640, 480);
8.   opencv.loadImage("imagen2.jpg");
9.   size(2*640, 480);
10. }
11.  
12. void draw() {
13.   image(opencv.image(),0, 0);
14.   opencv.blur( OpenCV.BILATERAL,1000,1000,0,0 ); 
15. //seems to do the same as  
16. //  opencv.blur( OpenCV.BILATERAL,1000,0,1000,1000 ); 
17.   image(opencv.image(),640, 0);
18.   opencv.restore();
19.   }

thanks in advantage