[hugin-ptx] Re: getting strange blending errors for a very wide panorama

2009-05-26 Thread Harry van der Wolf
It is an enblend problem. In the past week we tested a lot of enblend
versions starting with the svn3176 version (which is an enblend "3.1"
version) from my website. This svn3176 version is actually an incorrect name
as it was a load of hugin tools and enblend/enfuse at the time of Hugin
svn3176.

Kunlun121 tested, I made enblend builds.

The "3.1"  version is the only one not having this issue. All 3.2 and newer
versions (both from Andrew Mihal and from Christoph Spiel) have this same
issue and apparently on multiple OSes.

Kunlun121already filed a bug on enblend.sourceforge.net. I will expand the
bug report.
Another observation is that older enblend use/calculate the number of seams
"equal"  to the number of images. Newer versions create/calculate lots of
seams. This might actually be the problem: that lots and lots of "false"
seams are created, resulting in these weird seams in the final result.

Harry


2009/5/27 Bruno Postle 

>
> On Sat 23-May-2009 at 02:51 -0700, Kunlun121 wrote:
> >
> >However, I believe the cause is with Hugin, not enblend. I have
> >stitched and blended the exact same panorama many times before (even
> >over the years) with both PTGui and Hugin, always using different
> >versions of Enblend to create the final result and this never
> >happened.
>
> The way to tell if it is a hugin or enblend problem is to enable
> Remapped images in the Stitcher tab.  If the remapped images don't
> display the problem then it is a bug in the enblend you are using.
>
> --
> Bruno
>
> >
>

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[hugin-ptx] Re: hugin-0.8.0_rc1 released

2009-05-26 Thread Bruno Postle

On Sat 09-May-2009 at 02:11 +0200, Guido Kohlmeyer wrote:
>
>> * In constructor GLPreviewFrame glewInit() fails on my machine (return
>> code is 1), but the call to glewInit() in GLViewer::GLViewer returns
>> Ok.
>
>Right, I guess the missing OpenGL context is a problem. The GLViewer 
>seems to have a context and glewInit() will work properly. I have to 
>analyse it ...

I had a second machine where hugin segfaulted at startup as reported 
by others.  It seems that glewInit() can only be called once 
depending on how glew is built:

http://glew.sourceforge.net/advanced.html

So I removed the call to glewInit() in GLPreviewFrame.cpp and it 
seems to work ok.

I've committed this, though probably there is a better solution.

In particular I still don't have 'difference mode' available in the 
fast preview, even though this did work about a month ago.  Both 
machines have no hardware acceleration, so the difference mode 
worked fine with Mesa software rendering, but now it is disabled.

-- 
Bruno

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[hugin-ptx] Re: Fusing before or after

2009-05-26 Thread dkloi

On 26 May, 11:23, paul womack  wrote:
[SNIP]
> IF the bracketed shots were taken using a (good) tripod,
> the images can be fused prior to stitching.
>
> However, this makes subsequent use of exposure optimisation
> in hugin "questionable", since the numerical basis of the optimisation
> is destroyed by the (clever and generally desirable) things enfuse does.
>
> The other possibility is that fusing is on a PER shot basis, and may
> create edge conditions between successive shots in the panorama
> that might cause difficulties for enblend.
>
> However, post-fusing requires the shots to be aligned.
> One way round this is to create a hugin project of the
> "middle" exposure in the bracket set, and then use this
> as a template for the more extreme exposures. This avoids
> the difficulties of placing control points on the extreme
> exposures at the ends of the bracketing. This only works
> for tripod-taken sets.

I'm getting some weird results when using enfuse directly in Hugin:
http://cnqo.phys.strath.ac.uk/~daniel/Photos/Examples/Pre-fused.jpg
I've followed the tutorial given at 
http://hugin.sourceforge.net/tutorials/enfuse-360/en.shtml,
except for manually aligning the three stacks. I aligned the middle
exposures as normal, then each bracketed shot with the middle exposure
shot. I tried without and with photometric optimisation but got weird
results both times.

In comparison, I stitched and blended each exposure layer, then
enfused the three pannoramas and got this much better result,
http://cnqo.phys.strath.ac.uk/~daniel/Photos/Examples/Post-fused.jpg.

Source images were taken on tripod, -2EV, 0EV and +2EV exposure at
each position (6+1+1).

Cheers,
Daniel.
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[hugin-ptx] Re: problems with seams

2009-05-26 Thread dkloi

I played around with my setup and found that 10 horizontal, 6 at +50,
6 at -50, zenith and nadir will also cover the sphere comfortably.
Going to +60 you might be able to eliminate the zenith giving you 22
shots without nadir or 23 with.

Cheers,
Daniel.
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[hugin-ptx] Re: getting strange blending errors for a very wide panorama

2009-05-26 Thread Bruno Postle

On Sat 23-May-2009 at 02:51 -0700, Kunlun121 wrote:
>
>However, I believe the cause is with Hugin, not enblend. I have
>stitched and blended the exact same panorama many times before (even
>over the years) with both PTGui and Hugin, always using different
>versions of Enblend to create the final result and this never
>happened.

The way to tell if it is a hugin or enblend problem is to enable 
Remapped images in the Stitcher tab.  If the remapped images don't 
display the problem then it is a bug in the enblend you are using.

-- 
Bruno

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[hugin-ptx] Re: Fusing before or after

2009-05-26 Thread Bruno Postle

On Tue 26-May-2009 at 22:54 +0200, Benjamin Schnieders wrote:
>
>but everything align_image_stack can give me is a complete .hdr, (which 
>is, as far as i know, bad input to enfuse) a set of remapped images 
>(which i don't need as i want to remap them later, aligned in total) or 
>a pto file that holds information about the image offsets.
>
>seems that the latest is just what i need, but then, is there a method 
>of merging these pto files together in a way that the images will "stick 
>together"?

Yes, you could use ptomerge (from Panotools::Script) to join all the 
projects created by align_image_stack with a project created by 
autopano-sift-c or panomatic.

>to get proper results, atm i only see one solution:
>
>- take the brightest set of images, generate control points, align them
>- starting from the brightest image, use align_image_stack to align each 
>whole stack to a .pto file
>- manually add up the translations calculated by align_image_stack to 
>all further images and insert them into the big .pto from the beginning

This is exactly what the match-n-shift --stacks option does (also 
from Panotools::Script).

i.e. something like this in the hugin preferences should do what you 
want:

   AutopanoExe=match-n-shift
   Args=-b -a -f %f -v %v -c -p %p -o %o %i

-- 
Bruno

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[hugin-ptx] Re: Panotools::Script 0.22 released

2009-05-26 Thread Bruno Postle

On Tue 26-May-2009 at 16:47 +0200, Oskar Sander wrote:
>
>regsrv32 c:\xx\perl58.dll
>
>But get the error  "perl58.dll was loaded but the DllRegisterServer entry
>point was not found."

I don't know enough about Windows to know what regsrv32 does.

I expected that you would just copy all the files from the archive 
into the Program Files\hugin\bin folder.

Though apparently all the .exe files included version 0.13 of the 
library instead of 0.22 (oops), I've now updated the archive:

>>> https://sourceforge.net/project/showfiles.php?group_id=96188&package_id=293927

-- 
Bruno

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[hugin-ptx] Re: Fusing before or after

2009-05-26 Thread Tim Nugent

Hi Benjamin,

I deal with enfuse and bracketed sets with a patch I wrote:
http://ultrawide.wordpress.com/2008/11/16/hacking-hugin-part-1/

I load the first set of images, generate control points and align, then 
send the pano to batch. Then on the images panel, click 'bracket up' to 
switch to the next bracketed set, but keeping the control 
points/alignment from the first bracket set (this solves the problem 
when the set is too bright/dark to find CPs). Save and send to batch, 
then repeat for remaining bracketed sets.

At the end, all the panos should have been warped in the same way. Then 
I enfuse them from the command line.

Cheers,
Tim

Benjamin Schnieders wrote:
> hi all,
> actually i'm having a problem with exactly that question right now.
> 
> 
> i have a series of image stacks i'd like to stitch and fuse, so stack1_0 
> .. stack 1_6 until stack7_6. the thing is, the images are pretty dark, 
> so automatic control point generation does a very bad job using all the 
> images. align_image_stack however manages to align my stacks pretty well 
> (they are shot with a bad tripod, so a little alignment is needed)
> 
> but everything align_image_stack can give me is a complete .hdr, (which 
> is, as far as i know, bad input to enfuse) a set of remapped images 
> (which i don't need as i want to remap them later, aligned in total) or 
> a pto file that holds information about the image offsets.
> 
> seems that the latest is just what i need, but then, is there a method 
> of merging these pto files together in a way that the images will "stick 
> together"?
> 
> to get proper results, atm i only see one solution:
> 
> - take the brightest set of images, generate control points, align them
> - starting from the brightest image, use align_image_stack to align each 
> whole stack to a .pto file
> - manually add up the translations calculated by align_image_stack to 
> all further images and insert them into the big .pto from the beginning
> - run enfuse and enblend.
> 
> definitely not the best way. are there scripts oder other tricks that 
> will help?
> 
> thanks,
> Benjamin
> 
> > 
> 

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[hugin-ptx] Fusing before or after

2009-05-26 Thread Benjamin Schnieders

hi all,
actually i'm having a problem with exactly that question right now.


i have a series of image stacks i'd like to stitch and fuse, so stack1_0 
.. stack 1_6 until stack7_6. the thing is, the images are pretty dark, 
so automatic control point generation does a very bad job using all the 
images. align_image_stack however manages to align my stacks pretty well 
(they are shot with a bad tripod, so a little alignment is needed)

but everything align_image_stack can give me is a complete .hdr, (which 
is, as far as i know, bad input to enfuse) a set of remapped images 
(which i don't need as i want to remap them later, aligned in total) or 
a pto file that holds information about the image offsets.

seems that the latest is just what i need, but then, is there a method 
of merging these pto files together in a way that the images will "stick 
together"?

to get proper results, atm i only see one solution:

- take the brightest set of images, generate control points, align them
- starting from the brightest image, use align_image_stack to align each 
whole stack to a .pto file
- manually add up the translations calculated by align_image_stack to 
all further images and insert them into the big .pto from the beginning
- run enfuse and enblend.

definitely not the best way. are there scripts oder other tricks that 
will help?

thanks,
Benjamin

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[hugin-ptx] hugin installer for Windows Vista SVN 3884

2009-05-26 Thread Ad Huikeshoven
Hi,

A new hugin installer for Windows Vista/XP based on SVN 3884 can be found at
http://hugin.huikeshoven.org/. A dedicated site has been set up for these
posting using a dedicated domain using Google Apps. However, the link for
the file will point to a pbworks.com domain, where .exe files can be hosted,
and where no 10MB file maximum attachment limit exists. I posted a short
blog entry as well on http://ad.huikeshoven.org/ .

ad AT huikeshoven DOT org

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[hugin-ptx] Re: GSoC development blogs

2009-05-26 Thread Bart van Andel

> So here's my blog (it may be slow, I thing they limits trafic outside
> of Czech Republic):

Unfortunately it's so slow that my browser decided to stop loading. It
would probably help a lot if you host the images elsewhere. You could
also resort to a free service like Blogger/Blogspot and just link that
inside your website to keep everything together. As a bonus, you'll
get Atom/RSS feeds for free ;)

Best,
Bart
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[hugin-ptx] Re: problems with seams

2009-05-26 Thread slaterson

thanks a _lot_ to all that have replied.  i have done a full blown run
with 'perfect' results.  the only change from my previous attempts is
optimizing for 'v'.  next step is to tune the number of shots i need
to take and to start working with aeb shots.

thanks!
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[hugin-ptx] Re: problems with seams

2009-05-26 Thread dkloi

> i have noticed that i can exclude about half the shots when p=+60 and
> p=-60, however I haven't tried not including them for initial control
> point creation yet.

I use a 17mm rectilinear on a 1.5 crop camera which gives a slightly
smaller HoV as your set-up. I find that 10 shots at 0 degrees pitch, 8
shots at +50, 8 shots at -50, zenith and nadir works quit well.

I usually align and optimise the horizontal row first together with
vertical control pairs. After they've been optimised, I add the upper
and lower rows and optimise these. Finally I add the zenith and nadir.
I do my optimisation in stages. Sometimes, assigning different lenses
(different optimisation parameters) to the nadir and zenith helps
match up with the other images.

Cheers,
Daniel.
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[hugin-ptx] Re: problems with seams

2009-05-26 Thread slaterson

initial results are great.  i tried optimizing with 'v' and the sample
set of 12 images in my example above is stitched perfectly.  i am now
stitching the full set of 60 images to see how it turns out.  if there
are seams i will try your suggestions carl.

i'm going to try your suggestion of taking fewer shots, no horizon
shots but rather tilted up and down.  unfortunately, the furtherest i
can tilt the camera up is about 70 degrees (due to the physical size
of the lens), luckily 60 degrees is enough to get the zenith.

i have noticed that i can exclude about half the shots when p=+60 and
p=-60, however I haven't tried not including them for initial control
point creation yet.

thanks a lot for the help/advice!


On May 26, 2:00 am, Carl von Einem  wrote:
> Hi,
>
> >> On Mon, May 25, 2009 at 8:22 PM, slaterson wrote:
>
> >>> i was optimizing for the y, p & r.  i have a, b & c parameters for my
> >>> lens, so i wasn't optimizing for them.  i will try this again,
> >>> optimizing for 'v' as well.
>
> Make sure you have some vertical CPs in several areas of the room. I'd
> try to optimize the horizontal row first and deselect all others. Maybe
> in your case I would try to first of all only generate CPs for those
> images that were shot with p=0. Only select those in the lens tab and
> click the 'generate control points' button. As a first step I mostly
> only optimize for y and v, after that I add p, then also r. From time to
> time have a look at the CP table to identify bad CPs. Have a look at the
> preview to see if some bad CPs lead to freaky results (you could always
> reset the miscalculated values in the lens tab if something very strange
> happens). As soon as your first row is sort of stable, add the other
> frames one row after the other...
>
> While checking for bad CPs I often enough see areas that are worth
> adding some CPs manually.
>
> Even if you have once calculated a, b and c for your lens: do it again
> for this project. I mostly deselect y, p and r and then optimize first v
> and b, after that a and c. Next, optimize also for shift (d and e, but
> not together). Now again optimize for y and v, after that add p, then
> also r.
>
> It's not really a simplified 'point and shoot' technique but it works
> for me.
>
> >>> i'm using a canon
> >>> 5d body, at 24mm, the hfov is 53 degrees, so i think i am ok with
> >>> overlap.  i initially tried taking shots at 20 degree steps, however
>
> 9 or 10 images in the center row should be enough to get a 25 to 30 %
> overlap. This should suffice for rooms unless they consist of mostly
> huge white walls. The upper and lower rows will surely need less frames,
> just simulate that in hugin with dummy images (with a frame so you can
> see the ca. amount of overlap in the preview).
>
> Just another idea: try a different matrix of shots that have two rows at
> the horizon: one tilted up about 25-30 deg., the other tilted down the
> same amount. That way you might need about 4 rows the full sphere:
> 9x p=30 deg.
> 9x p=-30 deg.
> 6x p=80 deg.
> 6x p=-80 deg.
> -> it should work with just 30 images :-)
>
> Carl
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[hugin-ptx] Re: Panotools::Script 0.22 released

2009-05-26 Thread Oskar Sander
I am rusty, I don't manage to run the scripts.

I'll try to register the perl dll:

regsrv32 c:\xx\perl58.dll

But get the error  "perl58.dll was loaded but the DllRegisterServer entry
point was not found."

What am I doing wrong?

Cheers
O


2009/5/25 Oskar Sander 

> Ta,
>
> I will try and report back.
>
> Cheers
> /O
>
> 2009/5/25 Bruno Postle 
>
>
>> On Mon 25-May-2009 at 16:00 +0200, Oskar Sander wrote:
>> >If anyone here has compiled these for Windows XP already (or is about
>> to), I
>> >would be really thankfull for a download link!
>>
>> There is a zip archive with .exe versions of the command-line tools
>> in the sourceforge download area:
>>
>>
>> https://sourceforge.net/project/showfiles.php?group_id=96188&package_id=293927
>>
>> These are completely untested, it would be intereting to find out if
>> they work.
>>
>> --
>> Bruno
>>
>> >>
>>
>
>
> --
> /O
>



-- 
/O

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[hugin-ptx] Re: GSoC development blogs

2009-05-26 Thread David Haberthür

Hey Lukáš

> I thing it would be nice to have some thread where everyone who works
> for hugin in GSoC post his/her development blog so everyone could stay
> informed about progress of project.

I think that's a great idea, then it would even be possible to
generate some kind of "planet", where all dev-blogs are linked
together (something like the miro-people do on
http://planet.getmiro.com/).

[snip]

> So here's my blog (it may be slow, I thing they limits trafic outside
> of Czech Republic):

Slowness woulnd't be an issue for me, 'cause I prefer to read blogs
via my newsreader. But this is not possible with your blog, since
there is no RSS-feed which i could subscribe to. Could you provide
one, or if not, "switch" to a blogging system that does?

cheers
habi

(who just returned from holidays and is gonna test the newest builds
of hugin with some fresh panoramas soon :)

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[hugin-ptx] Re: Fusing before or after

2009-05-26 Thread paul womack

DaveN wrote:
> I don't know if this has been asked before (hard question to ask in a
> search) but why don't people fuse their images before making
> panoramas?  By that I mean the software for making panoramas (the
> hugin clone ptgui and autopano pro) seem to remap all the images to
> create differently exposed panoramas and then blend the panoramas.
> Wouldn't it be more efficient to exposure fuse the images and then
> make the panorama?

There are a number of pros and cons.

IF the bracketed shots were taken using a (good) tripod,
the images can be fused prior to stitching.

However, this makes subsequent use of exposure optimisation
in hugin "questionable", since the numerical basis of the optimisation
is destroyed by the (clever and generally desirable) things enfuse does.

The other possibility is that fusing is on a PER shot basis, and may
create edge conditions between successive shots in the panorama
that might cause difficulties for enblend.

However, post-fusing requires the shots to be aligned.
One way round this is to create a hugin project of the
"middle" exposure in the bracket set, and then use this
as a template for the more extreme exposures. This avoids
the difficulties of placing control points on the extreme
exposures at the ends of the bracketing. This only works
for tripod-taken sets.

Finally, pre fusing IS computationally efficient; if you repeatedly
"tweak" your panorama project, having all the fusing done as a pre-stage
is clearly efficient. Further, fusing a bracketed set of
stitched panoramas is a massively RAM intensive activity, whereas
fusing the shots separately might well fit in RAM.

BugBear (pre fuser, on balance)

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[hugin-ptx] Re: problems with seams

2009-05-26 Thread Carl von Einem

Hi,

>> On Mon, May 25, 2009 at 8:22 PM, slaterson wrote:
>>
>>> i was optimizing for the y, p & r.  i have a, b & c parameters for my
>>> lens, so i wasn't optimizing for them.  i will try this again,
>>> optimizing for 'v' as well.

Make sure you have some vertical CPs in several areas of the room. I'd
try to optimize the horizontal row first and deselect all others. Maybe
in your case I would try to first of all only generate CPs for those
images that were shot with p=0. Only select those in the lens tab and
click the 'generate control points' button. As a first step I mostly
only optimize for y and v, after that I add p, then also r. From time to
time have a look at the CP table to identify bad CPs. Have a look at the
preview to see if some bad CPs lead to freaky results (you could always
reset the miscalculated values in the lens tab if something very strange
happens). As soon as your first row is sort of stable, add the other
frames one row after the other...

While checking for bad CPs I often enough see areas that are worth
adding some CPs manually.

Even if you have once calculated a, b and c for your lens: do it again
for this project. I mostly deselect y, p and r and then optimize first v
and b, after that a and c. Next, optimize also for shift (d and e, but
not together). Now again optimize for y and v, after that add p, then
also r.

It's not really a simplified 'point and shoot' technique but it works
for me.

>>> i'm using a canon
>>> 5d body, at 24mm, the hfov is 53 degrees, so i think i am ok with
>>> overlap.  i initially tried taking shots at 20 degree steps, however

9 or 10 images in the center row should be enough to get a 25 to 30 %
overlap. This should suffice for rooms unless they consist of mostly
huge white walls. The upper and lower rows will surely need less frames,
just simulate that in hugin with dummy images (with a frame so you can
see the ca. amount of overlap in the preview).

Just another idea: try a different matrix of shots that have two rows at
the horizon: one tilted up about 25-30 deg., the other tilted down the
same amount. That way you might need about 4 rows the full sphere:
9x p=30 deg.
9x p=-30 deg.
6x p=80 deg.
6x p=-80 deg.
-> it should work with just 30 images :-)

Carl

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[hugin-ptx] GSoC development blogs

2009-05-26 Thread Lukáš Jirkovský

Hello everyone,
I thing it would be nice to have some thread where everyone who works
for hugin in GSoC post his/her development blog so everyone could stay
informed about progress of project.

There was similar thread in GSoC students mailing list, but I'm not
sure if it's open to public and moreover there were plenty of people
so finding the ones which work on hugin would be fairly difficult.

So here's my blog (it may be slow, I thing they limits trafic outside
of Czech Republic):

http://stativ.kx.cz/src/index.php?menu_id=5

Lukáš "stativ" Jirkovský

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