When I've run into this issue in the past, the only solution I've found is to re-arrange the order of the images, or to eliminate images that have too many redundant control points (or completely overlap other images)
On Thursday, November 16, 2023 at 4:15:01 AM UTC-6 mer...@archive.org wrote: > Hi Robert, > > On 14/11/2023 21:00, Robert Mahar wrote: > > Yeah, thats whats forcing me to stick with enblend and "jiggle the > > handle" till the black tiles go away. This 240 tile project gives 1 - 4 > > black areas every stitch if the images are in order ( right to left / > > top to bottom ). I was going to dig into this, but I've always had > > issues building enblend from source owing to vigra, but I guess I need > > to figure that out to look under the hood. FWIW I do see this issue > > when there is a regular overlap in the shooting pattern as there is in > > this project. Unfortunately the tool I'm working on as a substitute for > > cpfind needs the order of the images to be preserved at the moment - > > once thats fixed somehow then I can permute the image order and sidestep > > this. > > I am not sure how helpful my suggestions here are going to be, but from > my experience over the past month (doing the same but for photos > microfiche), I can maybe suggest a few things for this: > > 1. For blending, give multiblend [1] at try if you haven't already. I've > had some problems with enblend producing some odd artifacts at time. I > am not confident enough to say it was really an enblend problem (and not > my project variables / control points at the time), but I appreciate the > speed and reproducibility of multiblend. > > 2. For control point finding, you said you use a custom one. I also > ended up writing my custom control pointer (ORB based) finder and I was > having problems with visible seams until I realized my control points > weren't actually fitted properly with RANSAC - I wasn't accounting for > rotation in between my images (I expected there to be none). I'm not > saying the problems you're having are because you use a custom control > point finder, but it might be worth ruling that out by just using cpfind > with --multirow > > 2b. Related to control point finding, I don't know what is the reason > for not using cpfind, but if the reason is performance, then this might > help. If you make a template and apply it using pto_template, you can > use cpfind --prealigned and have cpfind 'do the right thing', so it > won't do excessive matching that you might be trying to avoid. At least, > I've understood this should do the trick at being more efficient. > (Please let me know if you figure this out (it's probably not too hard, > but I didn't try yet) > > 3. Maybe just open the project file in Hugin and see if the control > points are really all correct/align for the individual images. > > Regards, > Merlijn > > [1] https://horman.net/multiblend/ > > > > On Monday, November 13, 2023 at 10:21:02 AM UTC-5 bruno...@gmail.com > wrote: > > > > The black shadows are an enblend bug, they don't appear if you use > > the built-in Hugin blender (which is not as sophisticated as > > enblend, but is more stable) - Bruno > > > > -- > > A list of frequently asked questions is available at: > > http://wiki.panotools.org/Hugin_FAQ <http://wiki.panotools.org/Hugin_FAQ > > > > --- > > You received this message because you are subscribed to the Google > > Groups "hugin and other free panoramic software" group. > > To unsubscribe from this group and stop receiving emails from it, send > > an email to hugin-ptx+...@googlegroups.com > > <mailto:hugin-ptx+...@googlegroups.com>. > > To view this discussion on the web visit > > > https://groups.google.com/d/msgid/hugin-ptx/430b6057-4fb3-4f29-acb3-9cb3030a1713n%40googlegroups.com > > < > https://groups.google.com/d/msgid/hugin-ptx/430b6057-4fb3-4f29-acb3-9cb3030a1713n%40googlegroups.com?utm_medium=email&utm_source=footer > >. > -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to hugin-ptx+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/7535b32f-b791-4409-ba04-063f7f9dab3cn%40googlegroups.com.
