python将PNG格式的图片转化成为jpg

时间：2023-03-09 06:27:54
python将PNG格式的图片转化成为jpg 
"""

    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 Image

import cv2 as cv

import os

def 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")

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