The face detected has only few pixels
Here is my code
Hey @sanchit123manchanda, face_cascade.detectMultiScale returns list of x,y,w,h of the face section.
Your process of plotting it is completely wrong, watch the video section again, and than try.
Hope this resolved your doubt.
Plz mark the doubt as resolved in my doubts section. 
OK, so I need to crop the image using x,y,w,h to get the reqd image of face ?
Hey @sanchit123manchanda, no you need to use slicing direclty to get the face section. As done in face recognition project.