我正在尝试在jpg上粘贴一个png.这是代码:
#!/usr/bin/env python3
from PIL import Image
from PIL import ImageDraw
im = Image.open("existing.jpg")
logo = Image.open("python-32.png")
back = Image.new('RGBA', im.size)
back.paste(im)
poly = Image.new('RGBA', (512,512))
pdraw = ImageDraw.Draw(poly)
pdraw.polygon([(128,128),(384,384),(128,384),(384,128)],
fill=(255,255,255,127),outline=(255,255,255,255))
back.paste(poly, (0,0), mask=poly)
back.paste(logo, (im.size[0]-logo.size[0], im.size[1]-logo.size[1]), mask=logo)
back.show()
当我执行上面的代码时,我可以看到PNG图像显示为随机名称tmpc8rb455z.PNG.
我也尝试用jpg格式保存它但失败了.这意味着当我添加back.save('res.jpg', 'JPEG')并执行它时,我会收到这样的错误:
Traceback (most recent call last):
File "test.py", line 32, in <module>
back.save('res.jpg', 'JPEG')
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/PIL/Image.py", line 1893, in save
save_handler(self, fp, filename)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/PIL/JpegImagePlugin.py", line 604, in _save
raise IOError("cannot write mode %s as …