On Wednesday, 5 September 2018 at 12:43:40 -0700,
jiang...@gmail.com wrote:
On Wednesday, 5 September 2018 at 12:55:36 -0700,
jiang...@gmail.com wrote:
Once is enough,especially since you included relatively large images
(for email). It would have been better to put all the images on your
Google Drive page.
> [image: IMG_0429 - IMG_0432.jpg] <about:invalid#zClosurez>
Indeed, this is not good. I've put a copy at
http://www.lemis.com/grog/Photos/20180906/small/IMG_0429---IMG_0432.jpeg
for anybody who is interested in checking.
> In contrast, ptgui has no major issues at all.
> [image: IMG_0429 Panorama.jpg] <about:invalid#zClosurez>
This is better, but still not good. Copy at
http://www.lemis.com/grog/Photos/20180906/small/IMG_0429-Panorama.jpeg.
There are clear discontinuities round the frame of the “Chicago"
poster on the left.
> Can anyone help and tell me what I was doing wrong? and how can I
> improve the quality?
This is really very puzzling. I downloaded the images and stitched
them. I expected problems, and I got them. But they were in no way
related to your problems. Some look like Hugin bugs:
1. The Exif data clearly show:
File IMG_0429.JPG
Date taken: Friday, 24 August 2018, 21:12:58
Exposure: 1/4 sec, f/4.0 (EV 6.0), 29/640 ISO
Camera: Canon Canon EOS 5D Mark II
Lens: Canon EF 8-15mm f/4L Fisheye USM
Focal length: 8.0 mm (full frame equivalent: 8 mm)
But Hugin still asks for a crop factor. That shouldn't be
necessary. I put in 1, of course. Did you? That might be part
of the problem.
2. I set "circular fisheye" in the Assistant, and it located control
points relatively well, a maximum error of 4.6. But the fast
panorama preview looked terrible, full of black:
http://www.lemis.com/grog/Photos/20180906/Hugin-1.png. I tried a
normal panorama preview and got the same thing.
3. I stitched the panorama anyway, and got a panorama still with
black areas, but not nearly as much:
http://www.lemis.com/grog/Photos/20180906/small/IMG_0429-IMG_0432-2.jpeg
4. The disturbance was clearly related to the panorama head reaching
into the image, so I masked that off. And then, without any
further problems, I was able to stitch a reasonable panorama:
http://www.lemis.com/grog/Photos/20180906/small/IMG_0429-IMG_0432.jpeg.
Clearly it needs cropping, but I deliberately didn't do so.
All of these images are available at
http://www.lemis.com/grog/photos/Photos.php?dirdate=20180906
I can't see any discontinuities in the final panorama, and I did
absolutely nothing to avoid them. So I'm really puzzled how you ended
up with such poor results. The project file is at
http://www.lemis.com/grog/Photos/20180906/IMG_0429-IMG_0432.pto. Try
it and see what you get.
TO HUGIN DEVELOPERS: It seems to me that there are bugs involved here,
possibly relating to circular fisheye lenses. I take photos with full
frame fisheyes on a regular basis, and though I have issues that may
be related (and which I will report when I have investigated
sufficiently), I have never seen anything like this. In particular
the lack of recognition of the field of view and the the initial
panorama previews look like bugs to me.
Greg
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