 |
|
|
|
|
|
 |
| ||||||||
 |
 
|
|
|
|
|
|
|
|
|
| ||||||||
|
|
| 
| User list | Rules | You are not logged in.
Hi Everyone,
One of my recent panos stitches and has a good RMS but I don't understand why the pano - the horizon in particular - is not straight (horizonally level). I guess I know where the problem comes from: my tripod was not level. I assumed I would be able to correct this in APP but adjusting the roll does not seem to work. I have got used to roll-adjustment working all the time so I have become lazy about getting my tripod level.
The pano was taken with a gigapan unit and you can see how the first column of images is not straight at all. I'm not sure why the images aren't in a rectangular regularly-spaced rectilinear grid that has been rolled by a degree or three. Instead, the grid looks likes the left end has been twisted down and the right end twisted up. I get exactly the same result in Autopano Giga by the way.
Anyway, can the pano be fixed? I haven't come across this before. Files (21 images) are in ftp://ftp.autopano.net/incoming/panoram … roblem.zip now.
Aeris.
PS Extra snapshot shows what the horizon should look like (it wasn't taken from exactly the same place).
PPS I seem to have stuffed up this post's images. I always thought the system steered like a cow. Will put images in separate post.
Last edited by Aeriscera (2008-09-29 19:10:15)
Offline
Partly due to clouds moving over duration of the shoot perhaps?
How long did the Gigapan unit take to shoot this image set?
Also to me the whole pano looks as if it is pitched up - did you try correcting that?
Since you presumably know the YPR values of each image could you not try entering them manually?
Last edited by mediavets (2008-09-29 18:38:03)
Offline
Hi Mediavets,
The pano took less than 1 minute, so cloud movement shouldn't be a problem.
I am not sure what you mean by "pitched up". Do you mean as if the bottom of the pano has been pushed away from the viewer? I have never encountered a pano that needs the pitch altering (if that's what you mean by "pitch").
YPR values? (Makes sign of the cross.) Assuming I wanted to go over to the Dark Side, how would I know what they are?
A
Offline
Offline
Aeriscera wrote:
Hi Mediavets,
The pano took less than 1 minute, so cloud movement shouldn't be a problem.
I am not sure what you mean by "pitched up". Do you mean as if the bottom of the pano has been pushed away from the viewer? I have never encountered a pano that needs the pitch altering (if that's what you mean by "pitch").
YPR values? (Makes sign of the cross.) Assuming I wanted to go over to the Dark Side, how would I know what they are?
A
By pitched up I meant that the horizon appeared to be above the 'cross hair'.
Does the Gigapan head not report YPR values? Alternatively look at the values for Y across one row then replicate for other rows, and look for values of P in one column and replicate for other columns.
...............
Anyway you appear to have solved the level horizon problem judging by the image above?
Offline
mediavets wrote:
Does the Gigapan head not report YPR values?
Nope.
mediavets wrote:
Anyway you appear to have solved the level horizon problem judging by the image above?
You are referring to the second image? No, that's a different (but similar) pano showing what the horizon should look like.
Offline
Offline
Thanks Hankkarl. I saw that page but thought it didn't apply because I had tried the centre point and auto horizon tool and didn't think the vertical tool was what I needed. Now I do. I just need to find some big buildings in the foreground of my pano ... :-)
Aeris
Offline
IIRC, on the later versions of APP, if you use a rectangular projection, you can draw horizontal lines with the vertical lines tool.
Otherwise, use the yellow line halfway down the vertical line tool to match the horizon, or make a good guess.
If you had something reflecting in your pano, like a pool of water, you could use http://www.autopano.net/wiki/action/vie … _Photoshop
Last edited by hankkarl (2008-09-30 16:46:54)
Offline
