Image crop

# coding: utf-8
from PIL import Image
import os
import os.path
import numpy as np
import cv2

# 指明被遍历的文件夹
rootdir = r'D:\code\图像增广\gt'
for parent, dirnames, filenames in os.walk(rootdir):  # 遍历每一张图片
    for filename in filenames:
        print('parent is :' + parent)
        print('filename is :' + filename)
        currentPath = os.path.join(parent, filename)
        print('the fulll name of the file is :' + currentPath)

        img = Image.open(currentPath)
        print(img.format, img.size, img.mode)
        # img.show()
        box1 = (0, 0, 512, 512)  # 设置左、上、右、下的像素
        box2 = (0, 512, 512, 1024)
        box3 = (512, 0, 1024, 512)
        box4 = (512, 512, 1024, 1024)
        image1 = img.crop(box1)  # 图像裁剪
        image2 = img.crop(box2)
        image3 = img.crop(box3)
        image4 = img.crop(box4)
        image1.save(r"D:\code\图像增广\cunchu_gt" + '\\'  + 'port1' +' '+ filename)
        image2.save(r"D:\code\图像增广\cunchu_gt" + '\\'  + 'port2' +' '+ filename)
        image3.save(r"D:\code\图像增广\cunchu_gt" + '\\'  + 'port3' +' '+ filename)
        image4.save(r"D:\code\图像增广\cunchu_gt" + '\\'  + 'port4' +' '+ filename)