Opencv DNN 物体检测

import argparse
import cv2
import numpy as np

ap = argparse.ArgumentParser(
description='Script to run MobileNet-SSD object detection network')
ap.add_argument('-v', '--video', type=str, default='',
help='Video')
ap.add_argument('-p', '--prototxt', required=True,
help='Prototxt')
ap.add_argument('-m', '--model', required=True,
help='Weights')
ap.add_argument('-c', '--confidence', type=float, default=0.2,
help='Weak detections')
args = vars(ap.parse_args())

blobFromImage(image[, scalefactor[, size[, mean[, swapRB[, crop]]]]])