給圖片批量改名

import cv2
import sys
import numpy as np
import os
mySys = 'win'  # win
filePath1 = '/home/nk/tmp/gt/DUT-OMRON/'
filePath2 = '/home/nk/tmp/new/'
list_png = os.listdir(filePath1)
list_png = sorted(list_png)
if mySys == 'mac':
    list_png = list_png[1:]
print('1', len(list_png))
# ECSSD PASCALS DUTS-TE DUT-OMRON HKU-IS
if __name__ == '__main__':
    for i in list_png:
        #print(i)
        # print(type(i))
        img = cv2.imread(filePath1 + i)
        #print(type(img))
        # img = 255. - img

        i = i.split('.')[0]
        #print(i)
        output = filePath2 + 'DUT-OMRON/' + i + '_ras.png'
        print(output)
        cv2.imwrite(output, img)