Problem in Face Detection using HaarCascades

#1

The link to code is -

In line no 13 of the code, we have written gray_frame in detectMultiScale function. But it is giving colored video stream instead of black and white video stream.

Please explain why are we getting coloured video stream.

#2

hey @abhaygarg2001 ,
we are just converting the coloured stream to grayscale for better and faster face detection , as soon as we get the coordinates of our faces we make a rectangular box on coloured image frame to just show that as output.

You can see that in : code

for (x,y,w,h) in faces:
cv2.rectangle( frame ,(x,y),(x+w,y+h),(255,0,0),2)

we have used frame , not gray_frame. and hence we are showing this frame only , therefore we get a coloured video stream.