Looking for a lossless JPEG library

[Mark R]

I want to open some images which are saved as lossless JPEG.

None of my tools will touch them.

Any ideas?

Note, I don't mean lossess JPEG transofmation (lossless rotation or cropping). I mean handling files that were saved losslessly.

 

[nsafreak]

Hmmm perhaps Ifranview will open it? If not that you could always try the Gimp.

 

[notfred]

Considering that lossless JPEG is an obsolete format that was never widely adopted in the first place, good luck. What were they created with? Try using that to open them.

 

[Mark R]

They're medical files (CTs and stuff), and the commercial imaging libraries cost huge amounts.

Fortunately, I haven't come across many of these files in practice, but as I'm trying to develop an analysis tool - I don't want to find that I can't import them.

Perhaps, there are some PACS admins here who know how images are stored. At the moment, pretty much everything comes off the scanners as uncompressed bitmaps - but I don't want to find that once they come back off the long-term archive, they're compressed.

 

[Jeff7]

GIMP perhaps?

 

[TerryMathews]

This appears to have a converter.

 

[gsaldivar]

Try these linkzors:

http://www.rtstudents.com/pacs/free-dicom-viewers.htm

http://www.psychology.nottingham.ac.uk/staff/cr1/dicom.html

http://www.google.com/search?num=50&hs=...S+image+format+reader+free&btnG=Search

 

[Mark R]

Cool, gsaldivar.

Looks like there are some OS libraries there that will do what I want.

Interestingly, the vast majority of the free tools, don't handle the JPEG encoding - so I presume, that they've come across the same problems as I have.

I've decided to put things on hold, as it seems unlikely that I'll be seeing many JPEG encoded files - but have made a note of the resources.