Luigi Pirandello
Posts: 129
Location: Italy
Registered: 14 Aug 2010
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blend two or more nadir image
Posted: 3 Feb 2012 at 19:51 GMT
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Hi, i'have same strange problem. I have two nadir image with 180 degree of difference. The image are circular (180 x about 160, tokina fisheye 10 mm on canon full frame). So i load them on ptgui, set Panorama Setting on circular 180 x 170 and then align to search cp but ptgui find nothing.
if i add 10 or more controll point the optimizer (check for all image y r and p exept y for one image) give me very bad result.
Another strange te panorama setting some time change itself in equirettangolar.
is there someone that can explain this problem or can give me a link where there is an exaple of blandin two nadir circular shot?
ciao!! e thanks!
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: blend two or more nadir image
Posted: 3 Feb 2012 at 20:28 GMT
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I suggest that you simply include the two nadir shots along with all the other images in the full panorama project. Mask out the tripod/head from each nadir image. Make sure that ALL the images input to PTGui are in the same orientation - portrait or landscape. (Check the thumbnails on the Source Images tab). If the camera's auto rotation feature is set ON, there is always the possibility that the nadir images might be upside down with respect to those in the horizontal row, even though they superficially appear to be in the same orientation. An indication that an image is upside down would be the crop circle not aligning accurately with the image circle, as it should for all the images (assuming you have adjusted the crop).
Control point generation tends to work better when the images are already reasonably well aligned. Dragging the nadirs into alignment manually to begin with may help.
John
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Luigi Pirandello
Posts: 129
Location: Italy
Registered: 14 Aug 2010
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Re: blend two or more nadir image
Posted: 4 Feb 2012 at 0:02 GMT
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my first stop is work without nadir image on ptgui. After i get a good result i load the nadir image and un check all in the optimizer tab expet y r p for nadir image. Then i mark the nadir with one or two other image. Otimize without viewpoint funciont and then onother optization but with viewpoint check for the nadir.
if i use two or more nadir image i have to replace the workflow for all nadir image?
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Nick Fan
[NodalNinja]
Posts: 709
Location: Hong Kong
Registered: 26 May 2006
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Re: blend two or more nadir image
Posted: 4 Feb 2012 at 1:53 GMT
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Luigi Pirandello said: my first stop is work without nadir image on ptgui. After i get a good result i load the nadir image and un check all in the optimizer tab expet y r p for nadir image. Then i mark the nadir with one or two other image. Otimize without viewpoint funciont and then onother optization but with viewpoint check for the nadir.
if i use two or more nadir image i have to replace the workflow for all nadir image?
Are the nadir images taken on pano head at NPP or handheld or a mix of them?
Nadir images at NPP should be included in the stitching to save time.
Nick
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Luigi Pirandello
Posts: 129
Location: Italy
Registered: 14 Aug 2010
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Re: blend two or more nadir image
Posted: 4 Feb 2012 at 2:41 GMT
updated: 4 Feb 2012 at 2:43 GMT
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I shot the two nadir nadir with tripod but not at the npp point but the camera was perfectly perpendicular on the flor.
Is possible to set the panohead and the tripod on npp point for nadir shot? is it possible?
my shot is like these made with:
store.nodalninja.com/products/Zenith-%7B47%7D-Nad...
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: blend two or more nadir image
Posted: 4 Feb 2012 at 8:19 GMT
updated: 4 Feb 2012 at 8:26 GMT
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Luigi Pirandello said: if i use two or more nadir image i have to replace the workflow for all nadir image?
Yes, but if I have more than one nadir image, I usually assign control points only between each additional nadir and the first, taking care only to use the floor area if viewpoint correction is to be selected. You would probably always need to use VP correction when using the R1/R10, however carefully you attempt to position the tripod/head.
John
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Nick Fan
[NodalNinja]
Posts: 709
Location: Hong Kong
Registered: 26 May 2006
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Re: blend two or more nadir image
Posted: 4 Feb 2012 at 11:16 GMT
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Luigi Pirandello said: I shot the two nadir nadir with tripod but not at the npp point but the camera was perfectly perpendicular on the flor.
Is possible to set the panohead and the tripod on npp point for nadir shot? is it possible?
my shot is like these made with:
store.nodalninja.com/products/Zenith-%7B47%7D-Nad...
On R1/10, it is not possible.
Why do you need 2 nadir images for Tokina @ 10mm on full frame? You should have very small nadir footprint.
Nick
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Luigi Pirandello
Posts: 129
Location: Italy
Registered: 14 Aug 2010
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Re: blend two or more nadir image
Posted: 4 Feb 2012 at 12:12 GMT
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For Nick:
Yes but when the shadow fall on all side i thought that more nadir could shadows.
For Jhon:
image stitched without nadir - Control point and y r p vp with First nadir - CP y r p vp between first nadir and the other.
is correct?
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: blend two or more nadir image
Posted: 4 Feb 2012 at 13:02 GMT
updated: 4 Feb 2012 at 13:02 GMT
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Luigi, Yes that's ok.
John
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hindenhaag
Posts: 729
Location: Netherlands
Registered: 7 Mar 2010
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Re: blend two or more nadir image
Posted: 4 Feb 2012 at 13:38 GMT
updated: 4 Feb 2012 at 13:43 GMT
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Luigi,
it is hard to try to help you without knowing how you really shot your nadirs.
Can you tell us what equipment do you use, did you use a R1/R10 Nadir Adapter, handheld etc.
To get a good stitch means you should take the Nadir Shots in NPP.
The example of NN R1/R10 Nadir Adapter you mentioned needs the following workflow: once you open up the Nadir Adapter you move the NPP to a different horizontal and vertical position changing NPP by the distance between turning point of the Adapter to NPP = NAD :Nadir Adapter Distance. Once you moved to horizontal, this adapter has changed NPP position in vertical as well as in horizontal by NAD. It fell down in vertical and moved aside in horizontal.
Workflow to come back to old NPP: in vertical you have to raise center column by NAD. Now you are back in vertical.
Now you have to compensate the horizontal movement by opening the adapter: move the tripod to the left by NAD.
Now you are back to old NPP. Take your Nadir1.
To get information below your tripod legs, once again move the tripod sideways by NAD and take Nadir2.
I'll place some infos about Nadir Shots using NN Products tonight cause I am at the office right now.
You might have a look to this as well:
www.ptgui.com/examples/vptutorial.html
and John of course, one of the best experienced forum members:
www.johnhpanos.com/tuts.htm
May be you can send your set of pics to get a better basic information of what we are talking about.
Ciao,
Heinz
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Luigi Pirandello
Posts: 129
Location: Italy
Registered: 14 Aug 2010
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Re: blend two or more nadir image
Posted: 5 Feb 2012 at 15:27 GMT
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Hi, my equiment is:
a tripod with manfrotto 322rc2 that i turn down to shot the nadir;
nodal ninja ultimare r1
and canon full frame in verticalm mode with tokina fishey 10mm
this is my nadir images:
- imageshack.us/photo/my-images/214/10sec5220.jpg/
- imageshack.us/photo/my-images/845/10sec5227.jpg/
another question, i try to resolve some stitching error with panorama editor from a set of other photo taken handlehand but if i resolve a error from one side it compare another error from another side. so what kind of error we can resolve with panorama editor tab?
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: blend two or more nadir image
Posted: 5 Feb 2012 at 17:41 GMT
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Luigi, As I have already said, the nadir images should be stitched along with all the other images. This will enable the image parameters to be properly evaluated. If you can make available a full set of images at 2400x1600, we might be able to make some progress. I don't understand what you are attempting to do with the Panorama Editor window and some handheld images, so I cannot help with that.
John
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hindenhaag
Posts: 729
Location: Netherlands
Registered: 7 Mar 2010
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Luigi Pirandello
Posts: 129
Location: Italy
Registered: 14 Aug 2010
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Re: blend two or more nadir image
Posted: 5 Feb 2012 at 19:28 GMT
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yes i understand the workflow with tow nadir image, the link of images are for hindenhaag.
the secondo question about hasn't any relation abut nadir question. i would lilke to know the utility of panorama editor in generaly not for nadir patch
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Luigi Pirandello
Posts: 129
Location: Italy
Registered: 14 Aug 2010
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Re: blend two or more nadir image
Posted: 5 Feb 2012 at 19:29 GMT
updated: 5 Feb 2012 at 19:33 GMT
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thank. i know this link and i'm just study
very very interesting!!! If the nodal ninja adapter is resistent it is a good panorama tool.
i have just contact intalian vendor of this product.
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