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I'd like APP to have another editor--one that finds bad links. This editor would show two windows:
1. A histogram of link lengths.
2. A window similar to the CP editor, but it would show link lengths rather than RMS.
Imagine a circular pano taken on a good panohead. The length of each link should be about the same. If you bracketed, you should get some links near 0, and a cluster at another link length (call this the "average distance"). Links that are twice the average distance may be bad (or you may have lots of redundant links). links that are 1.5 times the average distance are probably bad, and so on.
Now imagine a spherical pano taken with a panohead. Assume each picture should link to the eight surrounding images (except the vertex and nadir). There are several things that will happen, depending on your head and how you shoot. I will find that there is an average horizontal distance which is the same in all rows (except the vertex and nadir shots, but those aren't really rows). There will be an average vertical distaance between any two rows, but the distance between rows 1 and 2 may not be the same as between 2 and 3 because I use a Manfrotto 303sph, which has no click stops in the vertical direction. However, I can probably set the pitch of the head within 5 degrees repeatably. There will be a diagonal distance which is given by the Pythagorean theorem. 
So a histogram may show links that aren't clustered where we expect them. Possibly we'd want three histograms here--Horizontal, vertical and diagonal (but what about the line that goes 2 horizontal and 1 vertical?)
The link length window would have a slider pair so you could eliminate all links above and below a given range. Or if the histogram buckets were coarse enough (10% of average link length?) and have buttons on the X axis to display those links.
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This would be useful, and I would add it along to the other feature requests regarding the CP Editor, we had several of these around the time of the last New Year's Eve. I would still add a higher priority to the feature request regarding being able to see all the CPs on the whole panorama and to be able to draw a rectangle on an area of that whole panorama and delete the selected CPs in it, or find new CPs in that area... very useful for quickly getting rid of useless sky/water/snow CPs and then drawing this rectangle (or polygon? I've been lately wanting a polygon more than a rectangle. But now that I mention it, I think a polyfon was also requested some time ago) along the horizon.
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DrSlony wrote:
This would be useful, and I would add it along to the other feature requests regarding the CP Editor, we had several of these around the time of the last New Year's Eve. I would still add a higher priority to the feature request regarding being able to see all the CPs on the whole panorama and to be able to draw a rectangle on an area of that whole panorama and delete the selected CPs in it, or find new CPs in that area... very useful for quickly getting rid of useless sky/water/snow CPs and then drawing this rectangle (or polygon? I've been lately wanting a polygon more than a rectangle. But now that I mention it, I think a polyfon was also requested some time ago) along the horizon.
I'd prefer a polygon over a rectangle.
I agree with Dr. Slony that the rectangle/polygon feature is more important, but if one is much easier to implement than the other, do the easy one first.
Last edited by hankkarl (2009-06-30 22:55:53)
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I really link this concept of "average link length". This is a powerful way of controling CP.
The idea of drawing a rectangle over the preview to add CP ( or remove ) is also a nice idea. Not really easy to code, but nice idea.
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Note:
I'll use LINK for the link between pictures, as seen on the pano editor as a green, orange or red line with a box.
I'll use link for the (imaginary) line between a CP on one image and the corresponding CP on another image.
The angle of the LINK may be a key.
on a one line pano, all LINKs should be in a straight line.
on a spherical pano, LINKs should be at 0, 45, -45 or 90 degrees, more or less. And the 45 is "loose" in that you may shoot in rectangles rather than squares so it may vary a bit, but APP should be able to derive an average angle for horizontal, vertical and diagonal LINKs.
Also, on the 50 (or 200 or whatever) CP links in a pair of images,
1. all the links should be at about the same angle
2. all the lins should be about the same length.
but that's probably the same thing as RMS, or very closely related to it.
Last edited by hankkarl (2009-07-10 23:10:21)
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