Having spent a weekend playing with various possibilities, I find the following works well for me (15mm fisheye/5D mkII).
1. Shoot 3 bracketed shots 2 stops apart and capture in Raw format (one button press for me) 2. Use dcraw -T -w -n 100 -q 3 -t 0 -W -b bb on the dark image with bb = 0.0625 0.25 0.5 1 to extract 4 8-bit tiffs and enfuse them. (If needed, use fulla to remove TCA on each image) 3. Repeat for the normal image with bb = 0.5 1 2 4. Repeat for the bright image with bb = 1 2 4 8 5. If needed (ie handheld) use align_image_stack on the three enfused images from steps 2,3&4. 6. enfuse the three enfused images. 7. Repeat for the each of eight sets of exposures prior to stitching. Sounds messy, but a shell-script easily does the trick. I seems to work as well as using 6 jpegs 2 stops apart -- my previous strategy. In fact the TCA works better and dcraw does a nice job on shadow noise. I did try extracting 16bit tiffs as described in http://wiki.panotools.org/16bit_workflow_with_hugin but the result was not as good -- maybe fiddling with gamma would have helped. Hope that is useful, Peter. From: Erik Krause <[email protected]> Subject: [hugin-ptx] Re: HDR post processing. Date: Sun, 15 Feb 2009 00:12:42 +0100 > > David Brodsky wrote: > > > > Additionally specify -l 29 > > > > enblend: image geometry precludes using more than 8 levels. > > Yes, of course. But if you don't specify it the maximum possible number > isn't used (at least in some versions). -l 29 is ridiculously high. You > probably won't find an image in the next 20 years that will allow for 29 > levels (would need to be more than 2,000,000,000 pixels the short side! ;-) > > > Even with full res image (32880 x 7120) it can't be more than 11. > > Yeah, and that's the problem: tufuse will most probably use 12 levels > on this image (or 9 on the small one), which reduces halos significantly > in some cases. > > -- > Erik Krause > http://www.erik-krause.de > > > > > ______________________________________________ > This email has been scanned by Netintelligence > http://www.netintelligence.com/email > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/hugin-ptx -~----------~----~----~----~------~----~------~--~---
