> PDF/A is for archiving, and while PDF/A-2 does support JPEG 2000, it's not a good choice for an archival format, because most JPEG 2000 implementations are broken in some way and many PDF viewers cannot correctly view such files. It was essentially a failure as a file format and will be deprecated in PDF 2.0. If the goal of archiving with PDF/A is to produce reliable files, JPEG 2000 conflicts with that goal.
This is VERY interesting information, I have two questions, if you know: 1. Do you have a link to the PDF 2.0 spec where it says that JPEG2000 will be deprecated? 2. What would be your suggestion for non-lossy compression for color images in PDF files? I know LZW is an answer, but the compression is much worst than JPEG2000. Can you think of a solution that brings a compression close to that of JPEG2000 without losing information? And of course I am not considering re-encoding a JPEG image, this is pointless as you mentioned. By the way: I read in the spec that JPEG2000 also works for b&w images, yet adobe acrobat cannot read b&w jpeg2000 images encoded with jai... don't know if this is because of jai or because of acrobat. Any idea? Costas --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
