用枕头将PNG格式转换为JPG格式 [英] Convert PNG to JPG with pillow

问题描述

我想转换一堆带枕头的图像(PIL为python3)从PNG转换为JPG。我已经探索了在网上做这件事的可能性，但似乎不可能。我有这个脚本：

from glob import glob
import os
from PIL import Image as image
for file in glob('*.png'):
    img=image.open(file)
    name,ext=os.path.splitext(file)
    img.save('E:\Icons\All\JPG'+name+'.jpg','JPEG')

但它给出以下错误：

Traceback (most recent call last):
  File "C:Python34libsite-packagesPILJpegImagePlugin.py", line 569, in _save
    rawmode = RAWMODE[im.mode]
KeyError: 'LA'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "E:/Icons/All/script.py", line 7, in <module>
    img.save('E:\Icons\All\JPG'+name+'.jpg','JPEG')
  File "C:Python34libsite-packagesPILImage.py", line 1682, in save
    save_handler(self, fp, filename)
  File "C:Python34libsite-packagesPILJpegImagePlugin.py", line 571, in _save
    raise IOError("cannot write mode %s as JPEG" % im.mode)
OSError: cannot write mode LA as JPEG

推荐答案

用代码，我用枕头完成了从png到jpeg的转换

from PIL import Image
import cStringIO
from glob import glob

def png_to_jpeg():
    for obj in glob("*.png"):
        in_file = open(obj,"rb")
        img = in_file.read()
        try:
            Image.open(cStringIO.StringIO(img))
        except:
            print("can not open image file error")

        im = Image.open(cStringIO.StringIO(img))
        _image = cStringIO.StringIO()
        im.save(_image, "JPEG")
        store_image = _image.getvalue()
        new_obj = str("new_") + obj.replace(obj.split('.')[-1], 'jpg')
        out_file = open(new_obj, "wb")
        out_file.write(store_image)
        out_file.close()

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