As I said, I'm just learning about JPEG 2000 myself.

Quoting from the archival storage article mentioned below:
"As an improvement to the 1992 JPEG standard, JPEG 2000 provides both lossy and lossless compression. Lossless compression allows the exact original data to be reconstructed from the compressed data. And yet, lossless compression typically achieves 50% to 60% reduction in file size compared with source files—without sacrificing resolution quality in the conversion! For this reason, among others, JPEG 2000 is becoming popular in the digital preservation industry. File extensions for JPEG 2000 files are .jp2 and .j2k. [Newer additions to the JPEG 2000 standard use file extensions .jpf & .jpx. See also http://en.wikipedia.org/wiki/JPEG_2000.]

PNG (Portable Network Graphics) is another ISO standard file format that provides lossless data compression. In some cases, such as images having areas with many pixels of the same color, PNG is even more space efficient than JPEG 2000. However, JPEG 2000 is more error resilient than PNG and is gaining a foothold in the digital preservation industry; hence the author’s focus on JPEG 2000 for general use.

JPEG 2000 software for Windows is identified in the following incomplete list of products—

There is some JPEG 2000 software (mostly plugins) available for Linux, but it seems to be slow in coming.

-mj-

Eric Shubert wrote:
On 09/16/2011 12:54 PM, Mark Jarvis wrote:

I've just recently found out about a company with CD/DVD media/drives
which don't use dye layer but actually melt a pit in the media. Here's
the company site http://millenniata.com/ and a good article about
archival storage in general http://goo.gl/vDwAZ. The drives aren't ready
to ship and I was going to pre-order one, but decided to let someone
else be the early adopter and have the fun with the low s/n machines.

I also had somehow missed or ignored information about JPEG 2000 files,
which I should have been using instead of .jpg for my personal storage.
For a while it looks like .jpg & .tif are still the lingua franca for
image exchange, however.
__ <http://goo.gl/vDwAZ>


Care to enlighten us about JPEG 2000 ?