MATLAB: HELP…How to detect corners using Harris corner detection Algorithm

Question

Hi, I am having trouble with getting this corner detection code to work properly. It works fine but points are scattered all over the place, i want the corner points to be detected within the bounding box. is there anything i need to add or edit?

This is the code i have so far:-

faceDetector = vision.CascadeObjectDetector('FrontalFaceCART');
cornerDetector = vision.CornerDetector('Method','Harris corner detection (Harris & Stephens)');
Irgb2gray=rgb2gray(Iface);
bboxes = step(faceDetector, Irgb2gray);
corners = detectHarrisFeatures(Irgb2gray);
Irgb2gray = insertObjectAnnotation(Iface, 'rectangle', bboxes, 'Face');
figure, imshow(Irgb2gray), title('Detected faces'); hold on; 
plot(points.selectStrongest(50));

Thank you in advance.

Answer 1

Try the syntax with the 'ROI' parameter, something like this:

corners = detectHarrisFeatures(Irgb2gray,'ROI',bboxes(1,:));

This will detect Harris corners within the first bounding box in bboxes.