AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

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2009.08.27 18:35 "[Tiff] Old and New JPEG Compression with Single libtiff?", by Kevin Myers
2009.08.27 19:00 "Re: [Tiff] Old and New JPEG Compression with Single libtiff?", by Bob Friesenhahn

2009.08.27 18:35 "[Tiff] Old and New JPEG Compression with Single libtiff?", by Kevin Myers

Sometime within the past few months, I recall seeing a message posted on the Tiff list where the poster had some kind of idea regarding how to support both old and new JPEG compression in tiff files using the same libtiff, i.e. no need to compile separate versions. Does anyone else recall this? Does anyone know if or when this might get included in a release?

The reason I ask is that because I recently found that my high dollar Kodak i280 scanner produces *old* JPEG compressed grayscale images of standard documents, while on the other hand it also produces *new* JPEG compressed color images for stitched long documents (e.g. well logs). Stuff like this just kills me. What kind of developer would implement conflicting garbage like that, especially for a multi-thousand dollar scanner? Anyway, I also found out that my irreplaceable legacy well log display application is only capable of displaying *old* JPEG compressed images, while most of my other image related applications expect to deal with *new* JPEG compressed images.

I hate to keep two separate versions of libtiff around just for dealing with these issues. The libtiff message that I recall seeing appeared to be a potential solution to these problems, but I wasn't aware of the related problems with my own applications, and didn't realize how important this would end up being for my own usage. Therefore I didn't keep the original message, and don't recall the poster's name or the actual subject of the message.

Hope I wasn't dreaming...

Thanks,
Kevin M.