Hi Jeffrey,
Am 19.01.2011 22:23, schrieb Jeffrey Martin:
Thanks Pablo for the detailed explanations.
By the way, with these photos, I am still getting CP's outside the
cropping circle. does anyone have any idea why that would be the case?
www.vrlog.net/temp/cpfind-pablo/bad-cp-shaved-nikkor.zip
<http://www.vrlog.net/temp/cpfind-pablo/bad-cp-shaved-nikkor.zip>
questions:
1) is cpfind using the lens FOV to calculate CP's? (as autopano sift C does)
(only FOV? or also a/b/c ?)
It uses the full information (including a/b/c), crop circle and masks.
2) is cpfind supposed to use the crop in hugin (so that there should not
be CP's outside the crop)?
Yes, it should. I have seen that the circle in your example was a bit
offset. This might be related to the "center on d/e" in the crop panel.
This means that the circle is always centered on the d/e parameters,
which worked nicely with my peleng. If bad d/e parameters are used, the
circle will be shifted. You could try without the "center on d/e".
I haven't added any safety margin for the crop in cpfind, so the the
crop circle should never be outside the image.
So far I used the following procedure for fisheye panos:
0. (Do only once:) Enter Preferences/control point creator. Create a new
cpfind detector entry change the default cpfind entry to use only the
"-o %o %s" arguments and make it the default. (multirow might or might
not be suitable for this purpose..)
1. Load images into hugin
2. Select fisheye and enter focal length and crop factor
3. Set crop on all images.
4. Press "align" button
5. (straighten + look for bad control points), optimize with a,b,c, d,e
if required.
6. save lens settings for later usage.
Once you have saved your lens, you can load the parameters and crop with
the "Load lens" button, and skip step 2 and 3.
ciao
Pablo
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