Public bug reported:
I have a long horizontal panorama (16 photos), that I took with a
tripod.
I opened the images, and told Hugin to align them
I used the Move/Drag tab to slightly rotate the image to be more
horizontal.
I used the Crop tab to approximately match the top/bottom/right/left
edges (the pictures being so little, it is almost impossible to see
whether I am enclosing any areas outside the image - but I can fix that
in GIMP with cropping or Heal Selection later).
I tell Hugin to Create Panorama.
As it is printing its output to the progress window, I suddenly notice
that the bounding box of the crop is extending at least 100% below the
line where I had set it.
When I looked at the image, there was a large area of black below the
image,
My images are 4000 wide by 3000 tall. Taken on a tripod, I would expect the
height of the resultant panorama to be somewhere around 3000.
Indeed, in GIMP, the total height of the image is 3013 (even closer to 3000
than I expected). However, that includes the area of black at the bottom. The
actual height of the image is somewhere in the neighborhood of 1700. Thus
Hugin has reduced the height of my image to about half.
The image itself does not appear to be flattened, and it appears to be
complete, so I suppose that it also has been reduced the same amount
horizontally. 16 images times 4000 pixels means that the upper bounds for the
width would be 64000 pixels, and the actual width is 30000.
If we assume that I overlapped by an average of 25%, I would expect it to be
about 48000.
I am sure I did not overlap by over 50% (30000/64000 = ~.47).
"Downscale final pano" 100 "percent of max. width"
I have tried to find out where the log files for the stitching are, but have
been unable to do so so far. The clipboard only shows the alignment log.
Perhaps there are command-line options to enblend/enfuse that will let me
direct the log output to a file of my choosing, but a quick check of the docs
(too quick, likely...) does not appear to show options for that. I don't know
if one can use re-direct (">") output on the "executable" or "default
arguments" lines in the preferences, but I can try that...
I could also perhaps start Hugin from the terminal, and capture output that
way...
If anyone has suggestions, either how to stop Hugin from shrinking my
panorama, or how to see the output to better debug the problem, please
let me know.
---------------------------------------------------
scott@scott-Asus-M2N68-AM-PLUS:~$ uname -a
Linux scott-Asus-M2N68-AM-PLUS 4.13.0-46-generic #51-Ubuntu SMP Tue Jun 12
12:36:29 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
scott@scott-Asus-M2N68-AM-PLUS:~$ lsb_release -dsc
Ubuntu 17.10
artful
scott@scott-Asus-M2N68-AM-PLUS:~$ echo $DESKTOP_SESSION
QLubuntu
scott@scott-Asus-M2N68-AM-PLUS:~$ apt-cache policy hugin*
hugin:
Installed: 2018.1.0+hg7969+dfsg-0ubuntu1~artful
Candidate: 2018.1.0+hg7969+dfsg-0ubuntu1~artful
Version table:
*** 2018.1.0+hg7969+dfsg-0ubuntu1~artful 500
500 http://ppa.launchpad.net/hugin/nightly/ubuntu artful/main amd64
Packages
100 /var/lib/dpkg/status
2017.0.0~rc2+dfsg-2 500
500 http://us.archive.ubuntu.com/ubuntu artful/universe amd64 Packages
(I was using 2017.0.0~rc2+dfsg-2 (Standard for [L]ubuntu 17.10) originally,
but noted that
elsewhere, a more recent version was available, and thought that perhaps the
"bug" (?) had been fixed there. Alas, no...
Hugin itself prints "2018.1.0.aac6fbdf0772" for my current version, from the
"Help" menu.)
scott@scott-Asus-M2N68-AM-PLUS:~$ apt-cache policy enblend
enblend:
Installed: 4.2-2build2
Candidate: 4.2-2build2
Version table:
*** 4.2-2build2 500
500 http://us.archive.ubuntu.com/ubuntu artful/universe amd64 Packages
100 /var/lib/dpkg/status
scott@scott-Asus-M2N68-AM-PLUS:~$ apt-cache policy enfuse
enfuse:
Installed: 4.2-2build2
Candidate: 4.2-2build2
Version table:
*** 4.2-2build2 500
500 http://us.archive.ubuntu.com/ubuntu artful/universe amd64 Packages
100 /var/lib/dpkg/status
I note that this PPA has a more recent enblend and enfuse, but that it
is apparently now one package, and apparently also is not available for
"artful"...
---------------------------------------------------
I don't know yet, if enblend/enfuse are messing with the image
dimensions, or they are working correctly with incorrect information
sent from Hugin...
Any ideas?
** Affects: hugin (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "Screenshot showing image height and the large black area
below the image."
https://bugs.launchpad.net/bugs/1815854/+attachment/5238510/+files/Hugin_Squeeze_Bug.jpg
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https://bugs.launchpad.net/bugs/1815854
Title:
Hugin (et al.) vertically squeezes my long panorama
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