python读取图片并修改格式与大小的方法

本文实例为大家分享了python读取图片并修改文件大小的具体代码，供大家参考，具体内容如下

# Author:NDK
# -*- coding:utf-8 -*-

from PIL import Image
import os
import cv2
import numpy as np
import glob
# old_dir = './test/'
# def read_image(cwd, newpath):
#   for roots, dirs, files in os.walk(cwd):
#     print(dirs)
#     for i in dirs:
#       print(i)
#       os.chdir(cwd + i)
#       for pic in glob.glob('*.png'):
#         _, image = pic.split('_')
#         img = image.split('.')[0]
#         print(img)
#         if len(img) != 0:
#           if int(img) % 2 != 0:
#             im = Image.open(pic)
#             im.save(newpath + i + '/' + pic)
# read_image('./num/','./new_img/')
# for i in range(10):
root_path = r"/test/9/"  #操作文件路径
print(root_path)
# dir = root_path+"images"+"/"
dir = root_path
count = 0
for root,dir,files in os.walk(dir):
  for file in files:
    srcImg = cv2.imread(root_path+"/"+str(file))
    img = Image.open(root_path+"/"+str(file))
    print(root_path+str(file))
    newImg = img.resize((50, 50), Image.BILINEAR)  #想调整的大小
    cv2.imwrite(r'./img2/'+str(file),newImg)    # 写入文件地址