Tools that handle jpeg2000

[hellfire]

Hello everyone,

I'm increasingly using high dynamic range images which can eat up serious amounts of filesize.
Jpeg2000 (eg. implemented with jasper) can store those quite well (at 16bit per channel which is usually enough for me), but it can be tricky to figure out a reasonable compression-level; certain artefacts are noticable at different exposure-levels and it becomes a stupid process of try&error&tryagain.
So what I'm looking for is some tool that can save jpeg2000, show a preview of the compressed image and lets me change the exposure of the preview.
Unfortunately I haven't found anything usable yet, although that should be a common requirement nowadays.
There are some commercial plugins for photoshop (from luratech and leadtek), but I wasn't really planing to pay for such a simple tool.
Any tip is welcome.

[Shockwave]

Irfanview will do it I think, you'll need the jpeg2000 dll though.

http://www.irfanview.com/

Problem being that while it lets you set the quality, there is no preview.

[hellfire]

Thank you Shockwave, but IrfanView uses a trial-version of LuraTech's encoder - it doesn't save images bigger than 640x480 (atleast not for free) and can't handle hdr (I'm not sure if that's a limitation of LuraWave or IrfanView).
What I'm especially looking for is a preview-function with exposure control, though.
If everything fails I can code a tool myself, I just can't believe such a thing doesn't exist already...

[va!n]

@hellfire:
just saw your post now... i know this lurawave algo... looks like awesome but you can use JPG (with correct settings) to produce smaller code as JPG2000 and with nearly same / sometimes better quality and no extra decoder needed ^^ Just take a look to XNView (freeware n great tool)

[hellfire]

Thanks for your hint, Vain.
I want to store high-dynamic range, namely 16 bits of precision per colour-channel.
Unluckily XnView doesn't seem to handle that either.
I don't really care about the output-format, I just require a reasonable amount of compression and some control over compression-artefacts - already tried 'standard' jpeg (see here), but the results were disappointing (while jpeg2000 works quite well and directly supports arbitrary bit-depths).
Just wanted to save the work of coding my own tool, but it seems like support for hdr isn't quite where I expected it to be...

[Jim]

I put this custom firmware on my Ixus a few months ago http://chdk.wikia.com/wiki/CHDK.  It lets you do HDR and a raft of other stuff.  Like you, I barely found any software that can deal with HDR let alone RAW image data at 16bpp.