Try to keep only the control points located on the building façade. For example control points located on the ground (thus at a varying distance from the camera) cant't be matched and should be deleted. As a result the ground should not be visible in the panorama.

This is a very particular kind of panorama: thought they are quite easy to stitch when the subject is flat (like a painting on a wall) they are impossible when objects located at different distance from the camera are involved...

I loaded APG 2.5 beta2 and played with above tips.
This building has turned into a nightmare.  I had to re-select all the control points as full auto got confused with all the repeated patterns. 
After extensive playing I got all 7 images linked together and almost displaying correctly.

All images were shot the same as you can see from the origionals and display, yet the right hand side has expanded out and lost part of the top overhang.  If I had the top part in the image... I would just fix in PS.

What's going on?  How do I fix?

NOTES:
1.  Shot with 12/18 mm lens. 
2.  This was shot Right to Left.
3.  At one point it said I had bad links between 1&2... and all I did was select areas just to the right of the bad links (and did not include the bad links) and bingo... all links turned green or yellow.

Last edited by Marv (2010-10-29 20:25:21)

Marv wrote:

mediavets wrote:

Did you try the 'free nodal point' aka 'multiple viewpoints' feature in APG 2.5 beta 1?

I would love to... Where is it?

Marv.

Group Settings -> Detection -> Control Points -> Ransac Model: Homography
(on other threat ist was discussed what this option could belong to.... google search gave hint it has to to with "multiple viewpoints"

the multiple viewpoints can be found:

Group Settings -> Optimization -> Optimizer Stages - Option: Multiple viewpoints

Liebe Gruesse,
Georg

PS: I just made a test today with portrait mode photos walking along a river and taking pictures from other side of river (houses about 150m away). I did walk 50 steps to take new pictures what is about 1/3 overlap on final images. This is far to big steps... multiple viewpoint option cant help here. the perspective is far to big, the steps to gig. Next time I try 5meter or so....

PPS: try beta 2 - much improvements and solved bugs ...

Last edited by gkaefer (2010-10-30 19:37:17)

Looks good but what happened to the color?

Last edited by digipano (2010-10-31 13:50:29)

digipano wrote:

Looks good but what happened to the color?

Dunno, colour correction seems still to be broken in APG 2.5 beta 2.

If you look a little more closely at my stitched image you'll see that anti-ghost has been somewhat too aggressive in several places.

Last edited by mediavets (2010-10-31 19:42:02)

Marv,

I'd love to have a go with that image set of yours if you are willing to make it available on-line for download (preferably as a ZIP file).

Marv wrote:

Your on.

Thanks Marv.

I concede defeat.

Some comments:

1. Too few images to attempt this sort of thing - insuffiecinet overlap - I think you need to take many more closer together to a have chance of getting a reasonable result.

2. Orientation (?) of the camera seems to vary producing inconsistent perspective which makes things very difficult if not impossible.

3. The very nature of the scene makes it all that much more difficult - so many repeating features, and any stitch error will stick out like a sore thumb.

4. I think you could have got a good result shooting with a conventional pano head - perhaps you think not?

You may find this related thread on the Panoguide forum interesting:
http://www.panoguide.com/forums/qna/8606/

Last edited by mediavets (2010-11-01 18:32:29)

mediavets wrote:

1. Too few images to attempt this sort of thing - insuffiecinet overlap - I think you need to take many more closer together to a have chance of getting a reasonable result.

I even tried with a 50-70% overlap images but even then it fails where as I can easily do such orthographic panos of large paintings without an issue so it seems that this has the problem with dealing with 3D objects in the scene with which the software cannot cope up as of now.

Doing such panos on pano bracket is not recommended bcoz it will need a fov beyond 150° & the corner will be badly stretched

I will try another attempt this weekend when I have more time to spend on this.

Normally such situations happens when we have a wide building & there are some trees or poles or any kind of obstruction in front of the building, in some case it can be a boundary wall, in such case you cannot shoot from far distance & have to place the camera between the building & obstruction which in most cases will impose a HFOV more than 150° wide.

Orthographic pano help in such situations.

Last edited by digipano (2010-11-02 14:27:15)

mediavets wrote:

APG 2.5 beta 2 shows promise but it doesn't seem quite 'good enough' yet - or maybe it's very sensitive to the type of scene and/or how you shoot the images?

Yes I do remember Alex mentioned that 2.5 will have orthographic stitch mode but seems that as of now its quite limited or the various modes need to be explained in detail to how they work so the user can shoot accordingly & get the result.

Flat art work can always be stitch with the present APG by altering exif to 1000mm focal length
Shooting method will remain same for the linear building (same for artwork) though I have tried varying the overlap from 30%-60% but none have worked.

OK Feels great I finally did it successful but not sure if I can repeat such results which is very important.

The set I succeeded was 9 images with 80% over lap, the main issue is that the editing preview shows unblended images making it hard to judge the results.

Image 1 shows unblended preview
But once rendering I checked the following options
Image 3

finally got the rendered image as this
Image 4

I then blended a regular pano shot with the linear image in CS4 & got the multi projection image
Image 2

Last edited by digipano (2010-11-02 18:07:59)

[bo] wrote:

Andrew, I really like in your test how the small green bush "grows" out of the trunk of the big tree in front and the tree itself looks like some sort of hovering autumn decoration!

And one tree and a silver car 'disappeared' altogether.

That anti-ghost system has a 'mind' of its own.