On Thu, 9 Feb 2012 11:39:35 -0800 (PST), kfj wrote: > On 9 Feb., 15:44, Robert Krawitz <[email protected]> wrote: > >> In regards focal length of source image: this would have been very >> useful to me when preparing this >> image:http://rlk.smugmug.com/Other/Landscapes/4851912_XB4SmT#!i=450968307&k... >> (read the writeup) > > This sounds very familiar to me. I have developed a few tricks to deal > with multi-lens panoramas. The first thing you need is lots, and I > mean lots of good control points. That's why I wrote the woa plugin, > which warps the images, looks for CPs and then unwarps their > coordinates. This usually gives me such an even spread and good > quality of CPs, even between images from different lenses, that the > optimizer produces very good results. The next plugin which I find > very useful is the crop-cp plugin, which looks at the crop area of the > panorama (as set in the preview) and throws out all CPs either inside > or outside it. This allows me to throw out all CPs which aren't really > crucial for the match (forground, for example - let the stitcher deal > with it best it can). Once I've lots of CPs in useful places left, I > optimize for 'everything but translation' and also do a photometric > optimization. Then I can proceed to stitch each set of images > separately, and I have to do the final composition in another tool, as > well. Lots of work, but, for example in mountaintop 360 degree > panoramas, the extra crispness around the horizon can be worth it.
I'll have to try this next time I do one of those. This isn't really my panorama season now. Extra sharpness in more important areas was exactly my reason for the one above. > BTW - a panorama head is a good thing - if most of my photography > wasn't done somewhere in the mountains I'd sure carry on all the time, > and they aren't even dear. I've built my own which was fun and it does > the trick, but out in the wild I rely on a walking stick and a > technique I've evolved over time which works well enough for natural > subjects. For the things I shoot panos of, I'm not sure how much it would really help. In a typical situation with grass or the like in the foreground, with a lot of high frequency texture but no low frequency, it doesn't matter even if things are way off, as long as the background is good. One of my panos (from a low mountain top, with our dog in the lower left foreground) it really would have helped (I wound up having to do a fair bit of manual work to fix up a big crack in the rock). > Having tools like enfuse deal with a situation like the one you > describe would be very welcome, hence my proposal. Especially the > layering is annoying for me, because in cinepaint I usually get > annoyed very quickly by how awkward everything is (maybe I've just not > done it enough...), the gimp only does 8 bits, digiKam just isn't > quite there yet and I can't accustom myself to fotoxx either... but at > least on Linux I was able write the plugin interface and the plugins I > need most. Fotoxx looks like it's really just for simple things. It has an interesting approach to panorama stitching, but it's a lot less flexible than Hugin, and by now I've done enough panos to establish a good workflow in Hugin. Your crop control points plugin is fantastic, and the last few panos I did it saved me a lot of time. Combining enfuse and enblend (enmeld?) would solve my last big problem with extended dynamic range panoramas. This is an example (look at the sky near the horizon): http://rlk.smugmug.com/Other/Landscapes/4851912_XB4SmT#!i=1079376498&k=Gyg2x GIMP really needs to stop messing around with single window mode and the like, and get its act together with high bit depth. -- Robert Krawitz <[email protected]> Tall Clubs International -- http://www.tall.org/ or 1-888-IM-TALL-2 Member of the League for Programming Freedom -- http://ProgFree.org Project lead for Gutenprint -- http://gimp-print.sourceforge.net "Linux doesn't dictate how I work, I dictate how Linux works." --Eric Crampton -- 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
