"""    先来说一下jpg图片和png图片的区别    jpg格式:是有损图片压缩类型,可用最少的磁盘空间得到较好的图像质量    png格式:不是压缩性,能保存透明等图"""from PIL import Imageimport cv2 as cvimport osdef PNG_JPG(PngPath):    img = cv.imread(PngPath, 0)    w, h = img.shape[::-1]    infile = PngPath    outfile = os.path.splitext(infile)[0] + ".jpg"    img = Image.open(infile)    img = img.resize((int(w / 2), int(h / 2)), Image.ANTIALIAS)    try:        if len(img.split()) == 4:            # prevent IOError: cannot write mode RGBA as BMP            r, g, b, a = img.split()            img = Image.merge("RGB", (r, g, b))            img.convert('RGB').save(outfile, quality=70)            os.remove(PngPath)        else:            img.convert('RGB').save(outfile, quality=70)            os.remove(PngPath)        return outfile    except Exception as e:        print("PNG转换JPG 错误", e)if __name__ == '__main__':    PNG_JPG(r"C:\Users\lenovo\Desktop\newI\s.png")