I m not getting boundary line around the face why?

#1

please help me i have written the same code as shown in video?
import cv2

cap = cv2.VideoCapture(0)
face_cascade=cv2.CascadeClassifier(“haarcascade_frontalface_alt.xml”)

while True:
ret,frame = cap.read()
gray_frame = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)

if ret == False:
	continue
		##(gray_frame,scaleFactor,minNeighbors)
faces=face_cascade.detectMultiScale(gray_frame,1.3,5)  

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

cv2.imshow("Video Frame",frame)
# cv2.imshow("Gray Frame",gray_frame)

#Wait for user input - q, then you will stop the loop
key_pressed = cv2.waitKey(1) & 0xFF
if key_pressed == ord('q'):
	break

cap.release()
cv2.destroyAllWindows()

#2

i checked
faces=face_cascade.detectMultiScale(gray_frame,1.3,5)

and its getting empty list

#3

using a low scaling factor i.e 1.1 or improving the lighting condition will surely help.

Thanks :slight_smile:

#4

but how do u know that ?

#5

I’ve observed this in my results. When scaling factor is low - it performs better