python+opencv 读取文件夹下的所有图像并批量保存ROI的方法

如下所示：

import cv2
import os

import numpy as np

root_path = "I:/Images/2017_08_03/"
dir = root_path+"images"+"/"
count = 0
for root,dir,files in os.walk(dir):
for file in files:
 srcImg = cv2.imread(root_path+"images"+"/"+str(file))
 roiImg = srcImg[36:521, 180:745]
 cv2.imwrite(root_path+"Image"+"/"+str(file),roiImg)
 count +=1
 if count％400==0:
  print count

来源：https://blog.csdn.net/chengzhongxuyou/article/details/76823964