PNG批量转JPG的Python脚本

python2安装PIL库，python3安装Pillow库，无需改动代码

import os
from PIL import Image
 
dirname_read="G:/sar2optical/testA/"  # 注意后面的斜杠
dirname_write="G:/sar2optical/output/"
names=os.listdir(dirname_read)
count=0
for name in names:
    img=Image.open(dirname_read+name)
    name=name.split(".")
    if name[-1] == "png":
        name[-1] = "jpg"
        name = str.join(".", name)
        to_save_path = dirname_write + name
        img = img.convert('RGB')#RGBA意思是红色，绿色，蓝色，Alpha的色彩空间，Alpha指透明度。而JPG不支持透明度，所以要么丢弃Alpha,要么保存为.png文件
        img.save(to_save_path)
        count+=1
        print(name)
    else:
        continue
print('运行完成！共转换了 %d 张图片' % (count))