Fellow Alien, I am also quite new to planet Hugin and I completely sympathise with your confusion.
The most important thing to do is Don't ever hit the Align button on the Assistant Tab - EVER! > In particular, while I thought I had it turned off, running another align/ > optimize cycle causes the 'exposure' of each patch to be destroyed by > some attempt to normalize whatever the dynamic differences are between > the six samples. There are in fact two "optimiser" tabs, one for "geometric corrections" called "Optimiser" and another for "photometric corrections" called "Exposure". When you hit "Align", it runs both, tries to "correct" everything it can think of, and generally causes mayhem. IMO "Cry Hugin! and unleash the Cogs of Warp!" would be a better label that "Align" .. ;-) The first thing to do is to reset all your project's "corrections" back to a clean slate : on the right hand side of the "Camera Lens tab", click "Reset", check all the boxes, and then hit "OK". Don't worry, this Reset does not affect any of your Control Points. Assuming your scans will not need "exposure correction" you need to ensure that all the parameters on the "Exposure tab" are unchecked (switched off) - use the "custom parameters below" drop-down and smite them out by hand. The values which the Exposure optimiser messes around with can be found at the bottom of the "Camera and Lens tab", click on the less-than-obvious "Photometric" sub tab . Hopefully these "corrections" were "Reset" to zero for all images (except under Exposure & Color, the Blue and Red multipliers should be 1.) On the "Optimiser tab" there are 4 'groups' of parameters to measure each image's camera rotation ( y, p, r ), camera translation ( X, Y, Z ), horizontal angle of view ( v ) and lens distortion model ( a, b, c, d, e ). The "optimal" values for these parameters can be found in the "Camera Lens tab" -> "Geometric sub-tab". >From your description, you have a panoramic ( rotation about a single viewpoint ) series of rectilinear images - so we can switch off the 'Rostrum camera' ( X, Y, Z ) movements. I'm guessing that the drawings you have will be (well executed) simple perspective projections so they won't exhibit any lens distortion; so switch off ( a, b, c, d, e ). I would be very impressed if the draughtsmen had managed to avoid parallax error between the images ( slightly different viewpoints ), but unfortunately that one cannot be automatically corrected by Hugin or any other similar pano-stitcher that I'm aware of - so cross your fingers ;-). So now the only parameters we are going to Optimise are the horizontal angle of view ( v ) and the camera rotation ( yaw , pitch , roll ) for each image in the project. Make sure these parameters are all Selected and Camera Lens tab -> geometric tab -> "degrees of view" is not Linked. Hit the "Optimise Now!" button ( top of the Optimiser tab ). Hugin will focus its powerful magicks on only these 4 "correction" variables, and I hope you will be impressed by the results in the Preview window ! If your Control Points are plentiful and good, the best way to check the results 'up close' is to process and export the project with these "correction" settings. ( Kay's suggestion about test-running smaller input files is good advice ). On the "Stitcher tab", most of the first set of options are best edited in the GL Preview window. The exception is "Canvas Size" : so hit "Calculate Optimal Size" to circumvent the default 'resize to 70%' imposed by the "Assistant" ( You might want to go to File -> Preferences -> Assistant -> "Downscale final pano" and set this to 100 % !) On the "Stitcher tab", for "Panorama Output" select only "Exposure corrected, Low Dynamic Range". Delselect or ignore the Remapped, etc checkboxes. Choose you output file format and compression, and then hit "Stitch Now ..." Now - depending on the size of the project and your CPU power - either go make a cup of tea, or go on holiday for two weeks. and keep your fingers crossed. ;J On Mar 4, 9:54 am, kfj <_...@yahoo.com> wrote: > On 4 Mrz., 04:55, tcorbet <terry.cor...@gmail.com> wrote: > > > 08. If it will help clarify what I can only poorly explain with > > words, I will try to upload screenshots of previews before and after > > being forced to press the Step 2 Align button so you can see what I am > > talking about. Otherwise, if you can just provide some specific step- > > by-step gestures that might get me some output ieven if it is a lost > > cause for me to ever truly understand that all your control parameters > > mean in order to be able to drive them correctly by myself. > > > Thank you for taking the time to read through this, and thanks for a > > great piece of software even if I do not get through the workflow to a > > final result. > > Greetings, alien. I think your problem interesting. Let me start with > a few suspicions I have: > > - I think you may be mistaken wanting to create a mosaic from your > images. The process of having a tows 0 r:miL8x ~s a > single point of view. This is not what hugin mosaics are, they are > taken from differing points of view, usually with the optical axis on > the normal of the image plane of a large planar object (like, a > facade). I'd propose you leave X,Y and Z well alone and only work on > y,p and r, just like on an 'ordinary' panorama. > > - I also think that you may be too attached to whatever progress > you've made on your path so far. Let me propose a different startegy: > radically compress your images to some few megapixels and play with > them, starting afresh withe a new project every now and then , and try > different strategies. Since you're a beginner, you may find it much > harder to recover from an erroneous step (you may not even be aware of > what needs to be done for the recovery) than to get it right in a > fresh project. Once you've figured out a promising path, it's simple > to scale up again and do it 'properly'. > > -Some of us, on this planet, have coerced images to a decent fit you > wouldn't believe. What I personally find hard to do, though, is trying > to figure out what someone has done wrong when they show us their > erroneous results. I think it would be more helpful if you put a > sample of your images, yet again, compressed reasonably, maybe in > download-friendly JPEG format, online somewhere, and let the > inhabitants of planet hugin have a go at them. Putting a sample bunch > of pictures out as a challenge is much more likely to produce a > helpful response to your problem than describing what has not worked > for you. If any of us succeed in stitching your image set, we can tell > you what we did and put you on the right path. > > 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
