opencv_091.py

import cv2 as cv

capture = cv.VideoCapture(0)
detector = cv.CascadeClassifier(cv.data.haarcascades + "haarcascade_frontalface_alt.xml")

image = cv.imread('people.jpg')
faces = detector.detectMultiScale(image, scaleFactor=1.05, minNeighbors=1,
                                          minSize=(50, 50), maxSize=(500, 500))
for x, y, width, height in faces:
    cv.rectangle(image, (x, y), (x+width, y+height), (0, 0, 255), 2, cv.LINE_8, 0)
cv.imshow("faces", image)
cv.waitKey(0)
cv.imwrite('face.jpg', image)

'''
while True:
    ret, image = capture.read()

    if ret is True:
        cv.imshow("frame", image)
        faces = detector.detectMultiScale(image, scaleFactor=1.05, minNeighbors=1,
                                          minSize=(30, 30), maxSize=(500, 500))
        for x, y, width, height in faces:
            cv.rectangle(image, (x, y), (x+width, y+height), (0, 0, 255), 2, cv.LINE_8, 0)
        cv.imshow("faces", image)
        c = cv.waitKey(50)
        if c == 27:
            break
    else:
        break

cv.destroyAllWindows()
'''