Since no one else has chimed in here I can offer my experience. It's been a while since I messed with this. I had several pano sequences I shot with live animals or people in them and they had moved from image to image so I needed to mask them out before the final blend.
Now, I don't remember exactly what I did but it involved loading everything into Hugin, completing the alignment and outputting multiple tiff files from nona. Then, I went into the TIFF with the undesired object (in this case, a horse that had lowered its head) and masked it out using GIMP. I don't remember exactly what I did in GIMP (I think I followed a tutorial somewhere, maybe on the panotools wiki) but the end result was alpha values of zero where I wanted the horse left out. Then, I had to manually feed the individual TIFF files to enblend to get the final blended pano. It worked for me but I think I only tried it that once. Only needed it that once. Something to note, one of the Google Summer of Code projects for enhancing hugin (one I myself submitted a proposal for) addresses this exact problem. The project will in some way make this something you can do inside of Hugin (probably by drawing a polygon around the object you want left out). Then Hugin will take care of the rest. So, assuming that one of the projects chosen is that masking project and that the implementation gets completed in the time allotted you might see something like this in the code base down the road a year or so. Just FYI. Sorry I don't have much to offer other than my own experiences and hope for beter things to come. :-) Seth On Sat, Apr 11, 2009 at 6:06 AM, grow <[email protected]> wrote: > > Hi Folks, > I wonder does anyone have experience stitching TIFF files with an > alpha channel mask? > > I have always thought that it would be useful and finally got around > to trying it this week. > > Usually I take two ground shots, standing in slightly different > places then include one in the Hugin stitch and then afterwards use > the other one to patch out the photographer's feet using Photoshop on > the down face of the cube. > > So this time I used Photoshop before the stitch - selected the area I > wanted included and used "Select-menu / SaveSelection" to create an > Alpha channel masking out the photographer's feet. I did this on > both down shots and included them both in the Hugin stitch. > > I was happy with the result: > http://veryderry.com/db/location.php?pano=441 > no photographer's feet, no patching required. > > So I tried it on a second set of images - I used the same method > created an Alpha Channel mask when I look at the preview of the file > in the Mac Finder there is a white space where the feet were. But > when I stitch the images together Hugin seems to have ignored the mask > and the feet are there! I have tried several variations and compared > the TIFF files between the two projects and have eliminated all the > difference. (First time around the Alpha channel was called "Alpha" on > the one that worked and not on the other so I changed that and re-ran > the stitch but of course it made no difference.) > > So after all that long preamble my question is ... have other people > had problems with Alpha channel masking? Is there a known error that > makes it work on some projects and not on others? Is there some fine > detail that has to be "just so" with Alpha channel masks? > > Any insights would be very welcome. > > George > > > > > -- [email protected] Graduate Research Assistant University of Minnesota Digital Technology Center --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
