python-----将图片与标注的xml坐标水平翻转

我们做机器学习的时候，总会用到很多训练集，然后我们的数据比较少的时候，就可以将图片翻转标注。代码如下：

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2019/6/28 13:59
# @Author  : xiaodai
import cv2
from PIL import Image
import xml.etree.ElementTree as ET
from tqdm import tqdm
import os

def flip_horizontal(jpg_file,new_jpg):
    im = Image.open(jpg_file)
    # out = im.transpose(Image.ROTATE_180)
    out = im.transpose(Image.FLIP_LEFT_RIGHT)
    out.save(new_jpg)


def flip_xml(xml_file,new_xml):
    tree = ET.parse(xml_file)
    objs = tree.findall('object')
    for ix, obj in enumerate(objs):
        name = obj.find('name').text
        if name == 'mouse':
            print(xml_file)
            obj_new = obj.find('bndbox')
            xmin = str( 1280 - int(obj_new.find('xmin').text))
            xmax = str( 1280 - int(obj_new.find('xmax').text))
            obj_new.find('xmin').text = xmin
            obj_new.find('xmax').text = xmax
            tree.write(new_xml)


if __name__ == '__main__':
    path = r'F:	emp12355_38625mouse'
    xml_files = [os.path.join(rootdir, file) for rootdir, _, files in os.walk(path) for file in files if
                 (file.endswith('.xml'))]
    jpg_files =[xmlfile.replace('Annotations','JPEGImages').replace('xml','jpg') for xmlfile in xml_files]
    files = zip(jpg_files,xml_files)
    for jpg_file,xml_file in tqdm(files):
        new_jpg = jpg_file.replace(jpg_file.split('\')[-1].split('.')[0],jpg_file.split('\')[-1].split('.')[0] + '_filp')
        new_xml = new_jpg.replace('JPEGImages', 'Annotations').replace('jpg', 'xml')
        flip_xml(xml_file,new_xml)
        flip_horizontal(jpg_file, new_jpg)