Kay: Thanks for the response. Comments below....
You should be able to do it all in hugin. When you say your attempts > failed, what went wrong? > First attempt I got hit by the misalignment. Reading the Hugin docs I decided to select "Exposure fused from any arrangement" rather than "Exposure fused from stacks" and that fixed the misalignment problem. My next problem was where Hugin (or sub-tool) decided to join the images. It didn't in general join them at the sky boundary. In many places it did it lower in the image and it appeared the blender (I think) was really messing up the canyon walls. My final few attempts where messing with masks trying to get the joint on the sky boundary. This failed because it made the sky boundary look bad. There is one common mistake in your situation. I suppose you still > have your initial attempt with all the images in hugin. Since your > stacks are not perfectly aligned the way you took them, you have to > uncheck the 'link' checkbox next to the image position fields in the > images tab for each of your misaligned stacks. If you don't do that, > the stacked images will be placed precisely on top of each other and > their positions will be linked, and it sounds as if this was happening > with your panorama. > Yes, I made this mistake. I did not unselect "link" for the 12 stacked images on any attempt I tried. You need control points between the images in the stacks in order to > align them, so in case you don't have them (linked stacked images can > do without control points), you'll need another run of a control point > generator - align_image_stack is popular for the specific case, but > cpfind with settings to create a few more points than usual (try -- > fullscale --sieve2size 5 -o %o %s) works well, too - and another > optimizer run. I also made this mistake. I typically get most of my panos to stitch without any CPs. This one had non for every attempt I made - not even between the non-stacked images. > Once everything is optimized, the minor shifts between the stacked > images should be dealt with and you can proceed to let hugin create > the fused panorama. You can check the quality of the alignment in the > preview by setting the viewing mode to difference in the preview tab > of the preview. If the overlap is generally very good, instead of > creating a panorama from fused stacks you can also try and go the > other way by creating an exposure fusion from an arbitrary > arrangement, which has the added benefit that it lets you keep the > intermediate layers to blend yourself if you want. > About the time I started this thread and before you replied, I got frustrated and used Photoshop to merge in the properly exposed sky in my 12 upper row images. If it wasn't for the misalignment, this method wouldn't have been that painful. With a little work however, I got this done in PS and then used the resulting 12 images for the top row in Hugin. This worked fairly well - but not great - the land-sky boundary looks a little unnatural. See the result here: http://www.360cities.net/image/squaw-creek-canyon-falls-idaho-usa#261.30,-79.19,110.0 With your tips I will go back and try again with Hugin. I'll let you know how it goes. > Do trials with small output sizes to see what looks about right, then > when you think you're getting there, crop out a typical section and do > it higher-res, then when all seems fine have a go at the full pano. > > Sadly I couldn't find a way to make hugin keep the fused stacks before > feeding them to enblend, which would be nice for you to play with (am > I blind? or is there really no such option?). What you can do, though, > is keep all the remapped images (no photometric correction, LDR) and > enfuse them manually. They should be well-aligned now they have been > made from unlinked stacks. > You're not asking me these questions are you? I'm such a novice I'm not sure I understand the questions, let alone the answers! :) > If you're on windows, there are also the enfuse-align droplets, where > you can just drag and drop sequences of images onto them and have an > exposure fusion made from an aligned unlinked stack. This might be an > option if you want to manually enfuse but not use hugin for it. I am on Windows but I'm not sure what you are referring to. Can you elaborate a little? And I'm sure there are many more possibilities... it's confusing at > first, but you'll get there ;-) > > Kay Thanks again Kay - I'm off to give Hugin another try. Calvin -- 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
