Hi Kay In my experience the most important things are to place lots of straight line CPs, and to rigorously exclude both off-plane and bogus CPs. Hugins CPFind can generate a lot of false matches when matching 'all vs all', so I try to organize my shots so that 'multirow' mode works. But in any case I check every CP visually.
Straight line CPs are the 'backbone' that keeps the whole pano square. They only work when the target projection is rectilinear, and at first the optimizer wants to generate yaw angles that are too big. So I have to reset and reoptimize from scratch a lot -- just positions and viewpoint, with nominal lens parameters. Eventually when the CP set is good, the pano snaps into alignment and I can then tweak lens parameters if it seems necessary -- though with a calibrated lens it rarely does. Regards, Tom On Jan 13, 5:05 am, kfj <[email protected]> wrote: > On 12 Jan., 18:48, Tom Sharpless <[email protected]> wrote: > > > I've been happily making high resolution mosaics of wall paintings > > with Hugin. > > > It's a bit chancy getting the very wide ones to align right, but with > > plenty of straight line CPs and care to avoid CPs not on the plane of > > the mural, I've had good results. In some cases I've had to add one > > image at a time to the optimized pool, presetting y,p,r,x,y,z to > > reasonably close values. > > I've done a fair amount of similar stitches (mainly maps and > signposts), and I found that trying to optimize y,p,r,X,Y and Z all at > once introduces to many degrees of freedom, so the whole thing totally > fails. But you can still work on the whole image set at once if you > only only do a few parameters at a time. I often start out with just X > and Y and then take it from there, optimizing the others in turn. Once > everything has 'gelled' nicely, you can optimize more parameters > simultanously. Doing it this way is probably faster than introducing > the images one by one and estimating parameters. The process also > benefits from lots of CPs (like, 100-200 per pair). > > This makes me wonder if there couldn't be a specific mosaic > optimization mode which follows such a pattern, thus avoiding the mess > that usually happens if you try optimizing everything at once. > > Kay -- 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
