小案例：利用python转换图片格式

zhzhx 发表于 2022-11-17 14:21

前言

常见的图像任务通常需要把照片统一成相同的格式，所以此文章正是为了统一格式而生，常见的主要有cv2和PIL.Image的相关操作，照片格式是一串数字加上后缀名

工具一：cv2

pip install opencv-python

之后就可以

import cv2

1.1 导包

import os

import cv2

import sys

import numpy as np

1.2 路径设置

path = r"C:\\Users\\86775\\test_change\\"
path2 = r"C:\\Users\\86775\\test_change2\\"

1.3 改格式重新传

1.3.1 用os.path.splitext()来判断

images = os.listdir(path)
for i in os.listdir(path):
print(os.path.splitext(i))# ('34474006827920603', '.png')
if os.path.splitext(i) == ".jpeg":
   img = cv2.imread(path + i)
   # print(img)
   new_imagename = i.replace(".jpeg", ".jpg")
   cv2.imwrite(path2 + new_imagename, img)

elif os.path.splitext(i) == ".png":
   img = cv2.imread(path + i)
   # print(img)
   new_imagename = i.replace(".png", ".jpg")
   cv2.imwrite(path2 + new_imagename, img)

elif os.path.splitext(i) == ".JPG":
   img = cv2.imread(path + i)
   # print(img)
   new_imagename = i.replace(".JPG", ".jpg")
   cv2.imwrite(path2 + new_imagename, img)

elif os.path.splitext(i) == ".PNG":
   img = cv2.imread(path + i)
   # print(img)
   new_imagename = i.replace(".PNG", ".jpg")
   cv2.imwrite(path2 + new_imagename, img)

elif os.path.splitext(i) == ".jpg":
   img = cv2.imread(path + i)
   # print(img)
   cv2.imwrite(path2 + i, img)

1.3.2 用split()来判断

images = os.listdir(path)
for i in os.listdir(path):
print(i.split("."))
if i.split(".") == "jpeg":
   img = cv2.imread(path + i)
   # print(img)
   new_imagename = i.replace(".jpeg", ".jpg")
   cv2.imwrite(path2 + new_imagename, img)

elif i.split(".") == "png":
   img = cv2.imread(path + i)
   # print(img)
   new_imagename = i.replace(".png", ".jpg")
   cv2.imwrite(path2 + new_imagename, img)

elif i.split(".") == "JPG":
   img = cv2.imread(path + i)
   # print(img)
   new_imagename = i.replace(".JPG", ".jpg")
   cv2.imwrite(path2 + new_imagename, img)

elif i.split(".") == "PNG":
   img = cv2.imread(path + i)
   # print(img)
   new_imagename = i.replace(".PNG", ".jpg")
   cv2.imwrite(path2 + new_imagename, img)

elif i.split(".") == "jpg":
   img = cv2.imread(path + i)
   # print(img)
   cv2.imwrite(path2 + i, img)

1.4 查看结果

wyangdh 发表于 2022-11-17 14:40

感谢楼主分享经验，学习了。

wkdxz 发表于 2022-11-17 15:19

IF写得有点多，放到列表里面可能好些

images = os.listdir(path)
for i in os.listdir(path):
print(os.path.splitext(i))# ('34474006827920603', '.png')

houzhui = os.path.splitext(i)
if houzhui.lower() in ['.jpg', '.jpeg', '.png', '.gif', '.webp']:
   img = cv2.imread(os.path.join(path, i))
   if houzhui == ".jpg":
         cv2.imwrite(os.path.join(path2, i), img)
   else:
         new_imagename = i.replace(houzhui, ".jpg")
         cv2.imwrite(os.path.join(path2, new_imagename), img)

ehcapa 发表于 2022-11-17 16:11

东西不错，感觉ps还是省事哪

yks1985 发表于 2022-11-17 16:15

学到了。。。感谢分享

sw7057 发表于 2022-11-17 16:21

感谢楼主分享经验，学习了。

laoz 发表于 2022-11-17 16:36

厉害，学习了

yiliber 发表于 2022-11-17 16:46

感谢楼主分享经验，学习了。

Paulwalkera 发表于 2022-11-17 16:46

又学到了一个技能

ykx184409780 发表于 2022-11-17 17:34

wkdxz 发表于 2022-11-17 15:19
IF写得有点多，放到列表里面可能好些

images = os.listdir(path)

学习一下

页: [1] 2

吾爱破解 - 52pojie.cn's Archiver

小案例：利用python转换图片格式