Passerelle de Maison-Alfort/Saint-Maurice

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Manu, I think the more obvious stitch error is here, but there are more errors visible at original size.

Passerelle de Maison-Alfort/Saint-Maurice by gadl.

My kind of weather for a panorama: only 35 pictures thanks to the white sky.
The stereographic projection can been seen here.
(The original picture is 8000x4000, but flickr failed to process it so I uploaded this 7000x3500 version instead.)

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	Manυ says: 8000x4000 ! Do you have an unusual computer to compute such a huge image ? -- Seen on your photo stream. (?) Posted 25 months ago. ( permalink )
	Manυ says: Btw I can't find ANY stitch error... BRAVO ! How did you manage that ? did you get yourself a nodal ninja ? Posted 25 months ago. ( permalink )
	gadl says: No fancy computer: a 4 year old Athlon. 1GB of RAM, but that's pretty common nowadays and I could really use more: handling 8000x4000 pictures is manageable if I don't work with more than 2 layers at a time. This panorama is the first I ever did with a true tripod. A tripod without panoramic head though, which means I was constrained to take landscape shots, and had parallax errors. The screw of my camera is not even aligned with its lens, so I cannot even hope for a single axis to be aligned properly. The error range is anyway a lot better than what I can do manually. As for the stich errors, see the notes for a start. Posted 25 months ago. ( permalink )
	Manυ says: Even at original size the errors are not very visible, congrats. Sorry for asking so many questions, but did you do this with the usual Hugin and Enblend while using the color correction with PTStitcher (as said here)? I really need to re-work my technique... Posted 25 months ago. ( permalink )
	dmswart says: Well chosen vantage point. Posted 25 months ago. ( permalink )
	Seb Przd says: While there are some stitch errors, they are still few and small. So really congrats on this panorama! Posted 25 months ago. ( permalink )
	gadl says: @Manu: Here is how I worked on this panorama (I never worked this way before, but it might be an interesting way to combine all these tools). - Run autopano-sift and hugin as usual, export each distorted picture as an individual 8000x4000 TIFF (that's 128MB times 36 files...) - color correct the TIFFs of the first row (9 pictures at pitch 0°) with PTblender, as it is where I had the most exposure variations - blend each row (pitch +20°, 0°, -30°, and -60°) as a separate TIFF with enblend - color correct the resulting 4 rows and the nadir pic with PTblender - manually merge the resulting 4 rows and the nadir pic in gimp (two at a time) - fix the more apparent errors using clone and rotate Running PTblender on full rows instead of all the individual picture was mainly a way to speed up the process. I also happen to think that the more picture you give to PTblender the more your colors get damaged. Manually blending 5 layers is a cinch (compared to stitching all 36 pictures), and it avoid many stitch errors since you can actually chose where the seams will be. If you consider that this was shot in landscape mode, in the end I let enblend bother with stitching the small edges, and I did the large ones. That also explains why almost all the stitch errors are vertical. @Dave, @Seb: Thanks! Posted 25 months ago. ( permalink )
	Manυ says: Thanks for sharing that technique I'll definitely have to try blending rows manually... Of course with my way of shooting it would mean blending half rows, but either way it sounds nice. Posted 25 months ago. ( permalink )

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Some rights reserved Anyone can see this photo

Taken in Maisons-Alfort, Ile-de-France (map)

Taken with a Sony DSC-T5.
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Taken on November 12, 2006

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Passerelle de Maison-Alfort/Saint-Maurice

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