[SOLVED] Matlab: Working on obtaining detected face using 'Detect and Track Multiple Face'

Matlab: Working on obtaining detected face using 'Detect and Track Multiple Face'

Currently I try to run example Detect and Track Multiple Face. When I try to crop the images of detected face as follow:

.....
while keepRunning
.....
displayFrame = insertMarker(displayFrame, tracker.Points);
for I=1:size(bboxes,1)
    J = imcrop(displayFrame, tracker.Bboxes(I, :));
    imshow(J);
    cropfile = sprint('crop %d.jpg, I);
    imwrite(J, cropfile, 'jpg');
 end
.....

However when the subject is out of view, there will be an error regarding 'index is out of bounds because size(tracker.Bboxes)=[0,4].

Solution

When you are no more in frame then bounding box is empty ;you should check it before looping

if ~isempty(bboxes)
    for I=1:size(bboxes,1) 
    J = imcrop(displayFrame, tracker.Bboxes(I, :));
    imshow(J);
    cropfile = strcat('crop', num2str(I));
    cropfilefull =[cropfile,'.jpg'];
    imwrite(J, cropfilefull, 'jpg');
    end
end

it worked for me