#!/usr/bin/env?python

import?numpy?as?np
import?cv2
import?cv2.cv?as?cv
from?video?import?create_capture
from?common?import?clock?draw_str

help_message?=?‘‘‘
USAGE:?facedetect.py?[--cascade?]?[--nested-cascade?]?[]
‘‘‘

def?detect（img?cascade）:
????rects?=?cascade.detectMultiScale（img?scaleFactor=1.3?minNeighbors=4?minSize=（30?30）?flags?=?cv.CV_HAAR_SCALE_IMAGE）
????if?len（rects）?==?0:
????????return?[]
????rects[:2:]?+=?rects[::2]
????return?rects

def?draw_rects（img?rects?color）:
????for?x1?y1?x2?y2?in?rects:
????????cv2.rectangle（img?（x1?y1）?（x2?y2）?color?2）

if?__name__?==?‘__main__‘:
????import?sys?getopt
????print?help_message

????args?video_src?=?getopt.getopt（sys.argv[1:]?‘‘?[‘cascade=‘?‘nested-cascade=‘]）
????try:?v