Python OpenCV face detection code sometimes raises `'tuple' object has no attribute 'shape'`

Question

I am trying to build a face detection application in python using opencv.
Please see below for my code snippets:

 # Loading the Haar Cascade Classifier
c         


        

Answer 1

To get the number of faces it should be:

print "Number of faces found in-> ", img_fname, " are ", len(faces).

I would also recommend that to convert image to gray scale you should write:

gray = cv2.cvtColor(im, cv2.COLOR_BGR2GRAY) instead of gray = cv2.cvtColor(im, cv2.COLOR_RGB2GRAY) as color images are loaded by openCV in BGR mode.