python读取xml信息和图片，用cv2标注图片

import os
import xml.dom.minidom
import cv2 as cv

ImgPath = '/home/newbee/CODEs/CSRNet-pytorch-master/train/images/'
AnnoPath = '/home/newbee/CODEs/CSRNet-pytorch-master/train/xmls/'

imagelist = os.listdir(ImgPath)
for image in imagelist:

    image_pre, ext = os.path.splitext(image)
    imgfile = ImgPath + image
    xmlfile = AnnoPath + image_pre + '.xml'

    #打开xml文档
    DOMTree = xml.dom.minidom.parse(xmlfile)
    #得到文档元素对象
    collection = DOMTree.documentElement
    #读取图片
    img = cv.imread(imgfile)

    filenamelist = collection.getElementsByTagName("filename")
    filename = filenamelist[0].childNodes[0].data
    print(filename)
    #得到标签名为object的信息
    objectlist = collection.getElementsByTagName("object")

    for objects in objectlist:
        #每个object中得到子标签名为name的信息
        namelist = objects.getElementsByTagName('name')
        #通过此语句得到具体的某个name的值
        objectname = namelist[0].childNodes[0].data

        bndbox = objects.getElementsByTagName('bndbox')
        for box in bndbox:
            x1_list = box.getElementsByTagName('xmin')
            x1 = int(x1_list[0].childNodes[0].data)
            y1_list = box.getElementsByTagName('ymin')
            y1 = int(y1_list[0].childNodes[0].data)
            x2_list = box.getElementsByTagName('xmax')
            x2 = int(x2_list[0].childNodes[0].data)
            y2_list = box.getElementsByTagName('ymax')
            y2 = int(y2_list[0].childNodes[0].data)
            cv.rectangle(img, (x1, y1), (x2, y2), (255, 255, 255), thickness=2)
            cv.putText(img, objectname, (x1, y1), cv.FONT_HERSHEY_COMPLEX, 0.7, (0, 255, 0),
                       thickness=2)
            cv.imshow('head', img)
        # cv.imwrite("/home/newbee/CODEs/CSRNet-pytorch-master/havatry.jpg", img)   #save picture

我的xml具体内容：

	image
	
		Unknown
	
	
		1920
		1080
		3
	
	0