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here is a link to three jpgs that stitch strangely, i've always just let autopano do everything on its own and never had a problem however this time the church steeple is getting distorted a lot (it is squished down in the stitched panorama vs the original), can anyone figure out how to stitch this but have the final image look closer to reality? and if so please post instructions on how you did it so i can do it myself from now on 
thanks!
http://www.sendspace.com/file/4uqpo5
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Hmm hmm hmm :]
I don't know what result a mercator projection in APG will give, I assume it would look very good using that, but since there is no new alpha of APG for Linux yet, and alpha1 crashes too much, I did this in 1.4.2.
Image 1 - cylindrical makes the tower too slim.
Planar looked interesting, but still wrong.
Image 2 - equirectangular squashes the tower, as you saw.
Image 3 - your image looked like an excellent candidate for what I had to do with this image, London Eye, image 25. I stretched the top in two steps using the equirectangular projection from image 2, and added a bit of sky above the spike. Looks good!
Other ideas:
Rotating sideways wont work on this since its too wide.
Setting focal length to 1000mm fixes perspective distortion but makes unfixable stitching errors and gives a skew pano.
ps. ok I couldn't resist it, I gave apg-a1r3 a try and it worked nicely!
Image 4 is a mercator projection, looks best I think :] Yay for APG! :]
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wow thanks! its amazing how many different results you get. i've always been so happy to just let the program run automatically, i had no idea it was so flexible. i think #3 is actually the truest one, #4 is quite nice but is stretched vertically a bit. i don't really understand what you did in either case though is there any chance you might be able to explain step by step how i could re-create #3 and 4 on my own? thanks so much
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Have a look here:
http://www.autopano.net/wiki/action/vie … Horizontal
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how do you do a mercator projection though? its not in my options, only cylinder, planar, spherical
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grapedrink wrote:
how do you do a mercator projection though? its not in my options, only cylinder, planar, spherical
As shown by DrSlony, Mercator projection is available only in APGiga 1.9 or higher. Maybe next year, you may see other projections in APGiga like this one
Last edited by marco-pano (2008-12-23 22:41:53)
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grapedrink: image #3 probably doesn't have any magic solution as you're imagining. You simply open the equirectangular projection in an image editor (Gimp/Photoshop/etc), select the area that begins to be squashed, and stretch it vertically a bit. Then select a vertically smaller piece of it, and stretch more, and so on. Select smaller and smaller areas because the projection squashes it vertically more and more - incrementally. If you still don't know what I mean then I can record a short screencast, but first just try it, might make more sense once you stretch it yourself.
I could have just as well stretched the left tower in the cylindrical projection horizontally, but I chose to stretch the top part of the equirectangular vertically since it influenced a smaller part of the image.
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Here's my attempt.
Planar projection in APG alpha 2 and perspective correction in Photobrush.
Last edited by mediavets (2008-12-24 00:55:27)
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