On Monday, 13 August 2018 at 17:50:53 -0700, clepsydrae wrote: > I have uploaded all the test images and the demo .pto here > <http://caseyconnor.org/pub/image/hugin/hugintest.zip> -- but be warned > that it is a 2GB file. It is uploading now and should be done at the latest > in ~45 minutes (18:30 PDT/UTC-7, 01:30 UTC).
OK, in the end it was only 1 GB.
On Monday, 13 August 2018 at 17:53:17 -0700, clepsydrae wrote:
> On Monday, August 13, 2018 at 4:58:30 PM UTC-7, Groogle wrote:
>>
>>> Smaller images are fine as long as they show the problem.
>
> ...if the 2GB file is ridiculous I can try to make a small version of the
> issue... let me know, thanks!
That was the background for my suggestion. But I've looked at the
original, and I think I have answers for you.
What I see is that the problems are with the source images, not Hugin:
1. The images are underexposed by about 5 EV. The control point
detectors just can't cope.
2. The images show extreme vignetting in the corners. This may be
the background for the clipping. I processed the images with DxO
Optics Pro, bringing out results that were acceptable, if not
good. DxO knows the lens/camera combination and corrected for the
vignetting in the lens, but not completely. That suggests that
there may be something wrong with your lens (or, of course, with
DxO's correction profiles). You may find things clear up with a
marginally longer focal length setting.
3. There was dirt at the top of the images, slightly to left of
centre. It wasn't visible until the images were lightened.
Take a look at
http://www.lemis.com/grog/photos/Onephoto.php?image=/grog/Photos/20180804/cedarpano.jpeg&size=3
for the results. That image is by no means perfect, but it's exactly
what Hugin did with the standard Align function. There's a
discontinuity on the board at bottom mid-left, but that could be dealt
with with a mask.
In passing, you probably don't need that many images for a circular
panorama (not 360°; that includes a complete sphere). My program
tells me steps of 50° for this lens, sensor and orientation, so 8
images (45° steps) should do it.
Greg
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