<filename>22_Haar_Cascade_ObjectDetection_Face_Eye.py
import cv2

# capture image
cap = cv2.VideoCapture(0)
#
#ret, frame = cap.read()
#img1 = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)

#https://github.com/Itseez/opencv/blob/master/data/haarcascades/haarcascade_frontalface_default.xml
face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
#https://github.com/Itseez/opencv/blob/master/data/haarcascades/haarcascade_eye.xml
eye_cascade = cv2.CascadeClassifier('misc/haarcascade_eye.xml')

while True:
    ret, img = cap.read()
    gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
    faces = face_cascade.detectMultiScale(gray, 1.3, 5)
    for (x,y,w,h) in faces:
        cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2)
        roi_gray = gray[y:y+h, x:x+w]
        roi_color = img[y:y+h, x:x+w]
        eyes = eye_cascade.detectMultiScale(roi_gray)
        for (ex,ey,ew,eh) in eyes:
            cv2.rectangle(roi_color,(ex,ey),(ex+ew,ey+eh),(0,255,0),2)
    cv2.imshow('img',img)
    
    if cv2.waitKey(30) == 27:
        break
    
cap.release()
cv2.destroyAllWindows()
<filename>22_Haar_Cascade_ObjectDetection_Face_Eye.py
import cv2

# capture image
cap = cv2.VideoCapture(0)
#
#ret, frame = cap.read()
#img1 = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)

#https://github.com/Itseez/opencv/blob/master/data/haarcascades/haarcascade_frontalface_default.xml
face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
#https://github.com/Itseez/opencv/blob/master/data/haarcascades/haarcascade_eye.xml
eye_cascade = cv2.CascadeClassifier('misc/haarcascade_eye.xml')

while True:
    ret, img = cap.read()
    gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
    faces = face_cascade.detectMultiScale(gray, 1.3, 5)
    for (x,y,w,h) in faces:
        cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2)
        roi_gray = gray[y:y+h, x:x+w]
        roi_color = img[y:y+h, x:x+w]
        eyes = eye_cascade.detectMultiScale(roi_gray)
        for (ex,ey,ew,eh) in eyes:
            cv2.rectangle(roi_color,(ex,ey),(ex+ew,ey+eh),(0,255,0),2)
    cv2.imshow('img',img)
    
    if cv2.waitKey(30) == 27:
        break
    
cap.release()
cv2.destroyAllWindows()
# capture image # #ret, frame = cap.read() #img1 = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB) #https://github.com/Itseez/opencv/blob/master/data/haarcascades/haarcascade_frontalface_default.xml #https://github.com/Itseez/opencv/blob/master/data/haarcascades/haarcascade_eye.xml