thambi
Posts: 34
Location: san antonio, United States
Registered: 1 Jun 2009
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PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 0:18 GMT
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Hi
I have opened a new thread asking for smartblend to fix the horizontal or vertical stitching errors i have been getting in all of my panos. I tried everything i could but couldn't make it work.
Yesterday i got my first paid job where i had to take 8 panos and all of them having the same issues.
It happens either in the door, or on the ceiling etc. Attached the whole project files in the following url.
www.yousendit.com/download/ZW9EV28rcTJiV3hjR0E9PQ
Please help me to fix that error. I am really frustrated  Infact i tried to use smartblend in windows but still it doesnt' fix. Hans asked me to upload the project files, i hope you(everyone) can definetly help me to come out of this situation.
When i knew not much about panoramic just in one click (align images from ptgui) gave me super result. But now am adding so many control points manually and deleting the bad points still doesn't help much. I hope you can help. But still, i couldnt' set cp less then 5 or 10...
If any information are needed i will be more glad to provide the pics. thanks in advance!
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michael medina
Posts: 385
Location: portland, oregon, United States
Registered: 27 Jan 2008
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 3:21 GMT
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i took a look at the files and i can get it pretty close, but there were still about 4 areas where you would have to manually fix the blending errors in photoshop. your pano head is not calibrated correctly.
i could link you to the pts file i ended up with, but it's still got some errors due to the pano head misalignment.
you also need to pay a bit of attention to the area by the door where it was a bit difficult to get control points, but sometimes that happens. anyway if your pano head was correctly set up, you could have enough control points on all the other images that one pair can go unstitched.
pdxvr.com/other/42.mov
you can see the errors in the door jamb and the drop ceiling in the hallway
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DennisS
Posts: 1292
Location: Los Anglels, United States
Registered: 1 Sep 2007
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 3:46 GMT
updated: 16 Sep 2009 at 3:52 GMT
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thambi,
I also agree that your pano head is not properly calibrated.
I messed around with the control points. There were several that were in the wrong place. They did not match up between the two images.
The doorway is very difficult to set control points at. The images are not totally in focus in that area. I had to guess at the placement of one of the points. I kept moving it around until the optimizer reported a small error and the doorway lined up.
Another option is to fix it in Photoshop after the fact. Sometimes when I get tired of trying to get something to stitch, I fix it in Photoshop. This pano is a good candidate for that.
Please respond to the email I sent you so I can send you the .pts file so you can see for yourself what I did.
Dennis
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thambi
Posts: 34
Location: san antonio, United States
Registered: 1 Jun 2009
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 4:46 GMT
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hi
i agree with you. but how do i calibrate my panohead? finally i found the upper rail setting without paralax is 96mm after taking lot of tests. and lower rail i set to 54 where i used the thread to setup the entrance pupil centered to the panohead. i dont know what else i should do to calibrate it... or is that all does not mean calibration?
and i know that door has hard time to find the cp's. finally i got a reasonable result from autopano giga and i fixed the blending in the door areas in photoshop. but i still got few more panos to complete. please help me to calibrate my panohead so atleast in my future panoramas i can avoid these kind of errors.
as i written earlier, when i didn't know much about these things my result were pretty good. but now i am having these kind of errors. my bad...
i hope you guys wont leave me hanging till i fix this issue for my future panoramas. looking forward to hear from you all the fix you got for me.
and thanks for looking at those panos. dennis i responded to your email. pls check.
thanks
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michael medina
Posts: 385
Location: portland, oregon, United States
Registered: 27 Jan 2008
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 5:06 GMT
updated: 16 Sep 2009 at 5:08 GMT
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shoot a pano with the camera tilted down 10-15 degrees so you can see the rotator in the image, then look at the bottom cube face, if there is any sawtooth to the circle of your rotator, you are too far left or right, if the circle bulges or is clipped you are too far front or back
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thambi
Posts: 34
Location: san antonio, United States
Registered: 1 Jun 2009
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 5:22 GMT
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hello michael,
thanks for the tip. let me understand it very clear...
sawtooth to the circle of your rotator, you are too far left or right, (so i need to move my vertical rail from the horizontal rail left or right). am i correct?
if the circle bulges or is clipped you are too far front or back (move my camera front or back on my upper rail? am i correct?
what is bulges or clipped means? am not very good in english. pls bear... with me.
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Smooth
Posts: 3773
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
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psj
Posts: 14
Location: bangkok, Thailand
Registered: 14 Oct 2007
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 6:50 GMT
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How did you manage to locate the camera to shoot the nadir?
It seems you got it at almost the same point as it stitched almost perfectly.
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 7:30 GMT
updated: 16 Sep 2009 at 7:31 GMT
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I have stitched your images and had a look at the parallax.
I do not believe you standard panohead settings are the big problem.
Even if it is not perfectly in NPP the horisontal shots stitch perfect.
However the zenith is very difficult to get perfect and you have a very large horisontal shift value of 53.
Optimizing for the horisontal only gives me an average of 1.18 after deleting some of the bad controlpoints.
The ceilings had some controlpoints that was very bad placed,
After correcting them I got an almost perfect stitch
However I do suspect that you do not have your camera perfectly mounted on the arm. That will typically give this problem with the ceiling.
You have to make sure it is mounted correct on the arm,
See this
You have not said what panohead you are using.
Hans
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 10:27 GMT
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thambi said: hi
i agree with you. but how do i calibrate my panohead? finally i found the upper rail setting without paralax is 96mm after taking lot of tests. and lower rail i set to 54 where i used the thread to setup the entrance pupil centered to the panohead. i dont know what else i should do to calibrate it... or is that all does not mean calibration?
thanks
What Camera and Lens are you actually using? The EXIF on your images is not telling anything.
'And what panohead. Sounds like a NodalNinja
Hans
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 11:59 GMT
updated: 16 Sep 2009 at 11:59 GMT
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Here is an almost perfect stitch + project file.
www.panoramas.dk/technics/thambi.zip
What you need to compensate for the error you have is to set individual lens settings for the zenith.
Also I added some extra controlpoints on some of the images and cleaned it up for the ones which was not correct.
Hans
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bigwade
Posts: 826
Location: Utrecht, Netherlands
Registered: 19 Oct 2005
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 14:50 GMT
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it's a 40D +shaved Tok (?) on a NN5
but the images are resized to 4096x6144 pixels and that can be a problem..
Maybe Thambi can explain why he did that....
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 15:47 GMT
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That should not be a problem. It is just the largest output from Camera Raw.
His numbers for the panohead are also OK, 54 and 96 for the Tokina should work perfect, however the optimized shift for the zenith increased from 51 to 74 hor and 17 to 25 vert.
That says that it is not mounted correctly on the camera plate.
Hans
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michael medina
Posts: 385
Location: portland, oregon, United States
Registered: 27 Jan 2008
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 16:48 GMT
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it was late when i was looking at that. i was going to mention that it mostly went together well, but it could definitely be calibrated better. it almost seems the tripod got bumped for the zenith and or one of the shots. and more than likely the camera is off axis with the arm
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thambi
Posts: 34
Location: san antonio, United States
Registered: 1 Jun 2009
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Re: PTGui - All 360 has horizon or vertical stitch errors. Help
Posted: 16 Sep 2009 at 22:17 GMT
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Hello Hans
Sorry for the delayed response. I worked all night to finish all of the 8 panos which i took. I had hard time to do that... but finally did it somehow.
Equipment i used: CANON 40D, TOKINA 10-17mm @ 10mm, Nodal Ninja 5 with upper rotator lock.
Hans, you were absolutely right that i must have not properly mounted in my panohead. But on this shoot i have had a problem since the day before i tried to set the paralax point and finally found at 96 - 54 i dont see a paralax. So i somewhat changed the settings i guess.
I meant, usually when i take the pano the upper rotator will be pointing on my right hand side and i start from 0*. But when i was taking this shot it was on my left side and i was confused and i didnt' want to act that i didnt' know what i was doing. So i just took it and then remounted it again.
The worst thing was, my panohead rotator was sliding very smoothly and i couldn't figure out what it was. I tightened all the screws but when i completed i noticed the nodal ninja screw on top of the rotator was lose.
Do you think that would caused all these issues? Could be, but my doubt is in my previous panos also i have been having the same issue, but that time i was shooting at 98mm on my upper rail.
Okay, how to find that i have a horizontal and vertical shift? I guess i placed it properly, still i am not sure. I just bought a two way leveler. And i really wonder how you work on that panos and make it stitch nicely.. it's great...
thank you so much all. And by the way as hans mentioned i have just increased the quality of the picture in camera raw to 4000x6000(not exactly). I guess it has nothing to do with the stitching...
So what i should do now to check everything is workign properly? And am going to buy a manfrotto tripod 755xb. I hope it's a very good one. Right now i dont have such a very sturdy tripod.
Today evening am going to shoot one indoor volleyball match where my friend is playing.. planning to take a 360. I make sure i mount properly and wanna see the result...
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