.png转.jpg

png图转.jpg图，只改变后缀

import os
import cv2

def main():
    image_path=r'E:\wapiandataset\JPEGImages'
    outpath=r'E:\wapiandataset\JPEGImages'
    listimg=os.listdir(image_path)
    for i in range(0,len(listimg)):
        if listimg[i].split(".")[1]=='png':
            print(listimg[i])
            impath=os.path.join(outpath,listimg[i].split(".")[0]+".jpg")
            img=cv2.imread(os.path.join(image_path,listimg[i]))
            cv2.imshow('1',img)
            cv2.waitKey(100)
            cv2.imwrite(impath,img)

if __name__ == '__main__':
    main()