Kurt Ehrich
Posts: 4
Location: Erlangen, Germany
Registered: 15 Sep 2008
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TriggerHappY
Posts: 618
Location: vancouver, Canada
Registered: 21 Jul 2004
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Re: Stitching problem
Posted: 16 Sep 2008 at 1:46 GMT
updated: 16 Sep 2008 at 1:47 GMT
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No hello or hi to the forum new guy/girl? A bit more info would be nice to save everyone some time. What lens/head/camera combo was used? Other wise I might be worried about unpacking some random rar.
have fun and welcome to Panoguide.
Dylan
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Kurt Ehrich
Posts: 4
Location: Erlangen, Germany
Registered: 15 Sep 2008
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Re: Stitching problem
Posted: 16 Sep 2008 at 3:42 GMT
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TriggerHappY, firstly: No.
Secondly: From one of the pictures the exif data:
Hersteller: Samsung Techwin
Modell: <VLUU L730 / Samsung L730>
Beschreibung:
Copyright: COPYRIGHT, 2007
Änderungsdatum: Mittwoch, 21. Februar 2024 18:38:20
Orientierung: Top / left side
X-Auflösung: 288/3
Y-Auflösung: 288/3
Auflösungseinheit: Inch
Firmware Version: 709291
YCbCr-Positionierung: 2
Aufnahmedatum: Mittwoch, 21. Februar 2024 18:38:20
Digitalisierungsdatum: Mittwoch, 21. Februar 2024 18:38:20
Belichtungszeit [s]: 1/125
Belichtungsprogramm: Normal
Belichtung: Auto
Exposure Bias [EV]: 0,0
Exposure Index: 1/1
F-Nummer: F3,0
Brennweite [mm]: 6,3
35mm-Brennweite [mm]: 38
ISO-Wert: 80
Verschlusszeit [s]: 1/108
Blende: F3
Max. Blende: F3
Digitalzoom: Off
Blitz: Not fired, compulsory flash mode, return light not detected
Messmethode: Multi-segment
Lichtquelle: Unknown
Weissabgleich: Auto
Kontrast: Normal
Sättigung: Normal
Schärfe: Normal
Farbraum: sRGB
Sound-Datei: RelatedSound
Sensing Method: One-chip color area sensor
Dateiquelle: DSC
Szenentyp:
Aufnahmetyp: Standard
Bildbreite: 3072
Bildhöhe: 2304
Komponentenkonf.: YCbCr
Durchschn. Kompression: 30023480/7077888
EXIF-Version: 0220
FlashPix Version: 0100
Herstellerinfos: 53 54 4D 4E 30 31 30 30 D9 F5 39 00 6B A9 00 00 80 02 E0 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 50 61 72 6B 20 42 79 65 6F 6E 67 63 68 61 6E CE 00 00 00 3B 02 02 02 44 01 BC 01 00 00 88 01 00 00 D6 01 00 00 6D 01 00 00 4E 04 00 00 10 01 00 00 00 00 00 00 00 00 00 ...
Kompression: 6
X-Auflösung: 1/1
Y-Auflösung: 1/1
Auflösungseinheit: Centimeter
Jpeg-Offset: 41414
Jpeg-Grösse: 3541
Index: R98
Version: 0100
Finally: If you don't want to open the files, if you lost your curiousity and if you are an overall careful person don't do it.
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James Rigg
[Panoguide]
Posts: 293
Location: London, United Kingdom
Registered: 1 Jun 2003
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Re: Stitching problem
Posted: 16 Sep 2008 at 7:56 GMT
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Hi Kure,
I've had a quick look at your images. These will not stitch cleanly because you have lots of parallax. Here for example is the same point seen from three of the images you provided:
As you can see these images simply cannot perfectly align. You need to be using a spherical panoramic head that you have calibrated for your equipment.
Regards
James
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Henri Smeets
Posts: 63
Location: Amsterdam, Netherlands
Registered: 28 Nov 2006
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Re: Stitching problem
Posted: 16 Sep 2008 at 8:00 GMT
updated: 16 Sep 2008 at 8:09 GMT
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Hello Herr/Frau Kure,
Welcome to the forum. (see how easy that was  )
What triggerhappy was trying to say is that perhaps a little common decency on introduction on this forum will get you a long way. Perhaps even will get you to have people try to help you stitch "a set of low res images shot from a tripod but not with the same settings in lighting and focus and not with a nodal point calibrated setup, taken of a rusty fence at sea".
Most of us here are enthousiasts in the field of panoramic imagery and willing to help each other voluntarily, no request can be strange enough! I for one have learned a lot from these people here! Thanks again guys, btw (wow, I did it again  )
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mediavets
Posts: 475
Location: Isleham, Cambs., United Kingdom
Registered: 8 Feb 2008
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Re: Stitching problem
Posted: 16 Sep 2008 at 8:20 GMT
updated: 16 Sep 2008 at 8:34 GMT
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Kure said: I have problems stitching rapidshare.com/files/145538878/bilder.rar.html. Please offer a workflow to stitch them properly using any available stitching software.
I had a go using Autopano Pro.
Looking at the results I am guessing that you shot these images with the camera on a tripod but without a pano head. Is that correct?
The rows are reasonably level but the separation between images - and hence the overlaps between images - in each row is rather inconsistent.
My feeling is that the resulting parallax errors - because the camera/lens was not rotated around the No Parallax Point (NPP) - are too great to achieve a good stitch.
IMO the nature of the scene and the focal length of the lens is such that it would always be less than straightforward to get a good stitch.
Andrew
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John Houghton
Posts: 2317
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Stitching problem
Posted: 16 Sep 2008 at 8:40 GMT
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As illustrated by James, the severe parallax problems make a good stitch virtually impossible. The non-uniform exposures don't help either. PTGui needed some manual control point assignment to get something resembling a panorama:
With objects so close to the camera like this, a well setup spherical panorama head is essential.
John
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Kurt Ehrich
Posts: 4
Location: Erlangen, Germany
Registered: 15 Sep 2008
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Re: Stitching problem
Posted: 16 Sep 2008 at 18:35 GMT
updated: 16 Sep 2008 at 18:51 GMT
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Thank you for your efforts. My results look similar.
I was using a tripod and no panoramic head.
These pictures were taken in australia. As a german I cannot just go to the same beach and take them again.
Anyway the main question was about the workflow.
I think John Houghton created the best panorama out of the images. How did you do it?
As you can see especially the stanchions are obviously wrong. I put some cps exactly on the suitable pictures' edges(where the cut occurs in the picture) but the cut remains. Why is this so?
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John Houghton
Posts: 2317
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Stitching problem
Posted: 16 Sep 2008 at 18:54 GMT
updated: 16 Sep 2008 at 18:57 GMT
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I used PTGui Pro V8.02. Seeing the image thumbnails, I expected problems and roughly arranged the images in their proper positions in the Panorama Editor window. I used the automatic cp generator (7 cp maximum) and supplemented these with some manual ones. The variable brightness control on the control points panel enabled features to be identified in the dark railings which would otherwise be invisible. In some seams I could barely find two features for control points. I used t2 points on the horizon to get it flat and level. The exposure differences were accommodated by the Automatic Exposure adjustment option on the HDR tab.
Since you cannot retake the shots, you could certainly improve on the result I got by outputting a layed psd file and use the transform tools in Photoshop to align the images better. It would take quite a bit of effort to do a good job, but it's surprising what you can do if you have the time and patience.
(The problems with the stanchions are inevitable given the amount of parallax. You just cannot make everything align at once).
John
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Kurt Ehrich
Posts: 4
Location: Erlangen, Germany
Registered: 15 Sep 2008
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Re: Stitching problem
Posted: 16 Sep 2008 at 19:07 GMT
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I think correcting the sea's waves won't be as obvious as the stanchions.
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