i need to crop an image after face detection

i need to crop the face after face detection using viola jones method clc; vid = videoinput('winvideo',1); preview(vid); start(vid); set(vid, 'ReturnedColorSpace', 'RGB'); for frame =1:2 % your function goes here thisFrame = getsnapshot(vid); if frame == 1 a = thisFrame; else b = thisFrame; end pause(1); end faceDetector = vision.CascadeObjectDetector(); bbox = step(faceDetector, a); IFaces = insertObjectAnnotation(a, 'rectangle', bbox, 'face'); imshow(IFaces); after this i have to crop the face

[prashanth]

 for i = 1:size(BB,1)
 J= imcrop(IFaces,BB(i,:));
   figure(3),subplot(2,2,i);imshow(J);
 end

[priti kale]

That is fine but I wish to crop more face than this codes so where i do changes in code.

Answer 1

[Explorer]

May be this could help you.

http://www.mathworks.com/matlabcentral/answers/112917-how-to-detect-hand