[Image-SIG] problem about color about some jpeg

[Cesare Leonardi]

feihu_roger ha scritto:
> I had a file f.jpg. It can be corrent show by acdsee or IrfanView, but
> can not open it by IE.
> 
>>>> f=Image.open('f.jpg')
>>>> f.show()
> 
> The new pic is color error, please see screen_snape.jpg .
> 
> f.jpg can be get from : http://farm1.static.flickr.com/174/462386397_579d1f4915_o.jpg
> (IE only see red cross)
> 
> screen_snape.jpg gan be get from:http://farm1.static.flickr.com/216/462386405_d24140a4b9_o.jpg

Your images are JPEG using CMYK colorspace (normally JPEG use RGB 
colorspace). It is a format that many image viewer cannot handle (in 
fact IE and Firefox cannot shows them) but still used in some graphics 
context.
It's known that PIL has some problems treating JPEG CMYK, as reported at 
least in these thread started from me:
http://mail.python.org/pipermail/image-sig/2006-April/003862.html
http://mail.python.org/pipermail/image-sig/2007-February/004336.html
Sorry but in the meantime the web space i've used in these thread to 
post some sample images and some text note, is not available to me 
anymore, so the links are broken.

However, in the first thread Kevin Cazabon has posted a patch that 
resolved the problem with all my images and that was accepted by PIL 
developers. The problem is that the patch applied is not the same as 
proposed by Kevin and the upstream version still shows problems on some 
images.

If you want to try, some month ago i've verified that Kevin's patch 
still applies correctly to 1.1.6.
You can rename your "JpegImagePlugin.py" to something else and 
substituting it with attached one (remove "KevinPatch").

Good luck.   ;-)

Cesare.

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