At the risk of being accursed of only liking your response because it is almost as verbose as my postings, I do have to say thank you very much, JohnG. I apologize for my over-long posting, but given the non- standard nature of this content, plus the complexity of the software interface to any newcomer, it seems like any posting has to cover a lot of ground.
Your reply does cover a lot of ground, and I am still studying it to see which of the parametric settings you recommend are the ones that I stumbled upon and which are new ones to try. I have learned that if I hit Align, most of what I carefully contrived as simple 'relocation transformation' has been disturbed. It seems like being able to go directly to step 3 is what I need, but that breaks with a log message that is not very helpful -- appears as though some attempt to generate a background, batch command line invocation of some tool has failed. On Mar 4, 8:41 am, JohnG <[email protected]> wrote: > 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 <[email protected]> wrote: > > > On 4 Mrz., 04:55, tcorbet <[email protected]> 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. 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