[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Yuval Levy]

Bart.van.Andel wrote:
> Great! Bob's bash script (as shown earlier in this thread) should be
> added as well.

done two weeks ago when he published his script



> One thing in the readme is incorrect:

corrected, thanks.


> Concerning integration: it seems Hugin is prepared to use different
> blenders from the GUI, as the Stitcher tab shows a pulldown menu. It
> would be most convenient of course if the items in that menu are
> configurable through the options menu, so Smartblend can show up there
> as well.

we'll need some major work on the GUI later on. I am not convinced that 
preferences is the right place for this choice (like it is not the right 
place for the choice of control point generators).

For the information of the community, I've sent an email to Michael 
Norel (author of Smartblend), inviting him to join the community and 
asking for permission to distribute smartblend with hugin. A copy of my 
message is below. If any of you is in contact with him, I would 
appreciate if you would follow up with him too. It would be great if he 
would join this community.

Yuv

--- copy of message to Michael Norel ---

Dear Michael,

I've heard from different sources on the internet that you inted to 
release smartblend soon under an open source license. Is this true?

If Yes, would you be so kind and allow the hugin project to distribute 
smartblend with it?

hugin is the most advanced open source panorama making software.

at the moment hugin comes with enblend and adding options is in the 
interest of the users and the project.

you will find in the hugin community many people that will be happy to 
help porting smartblend to other platforms (AFAIK there is no linux 
version). A few have already produced wrappers to use smartblend from 
hugin (with wine in Linux or directly in Windows).

I encourage you, if you have not done so yet, to join the hugin mailing 
list at  - you will enjoy to 
see how people appreciate your software.

Thank you, and best regards
Yuval Levy

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Bart.van.Andel]

Great! Bob's bash script (as shown earlier in this thread) should be
added as well.

One thing in the readme is incorrect:
  1. save smartblend-hugin.bat to a known path
should be
  1. save smartblend-hugin.bat to the path where smartblend.exe
resides

The script uses its own path to determine the location of
smartblend.exe, so they have to be in the same path (either that, or
one has to modify the batch file manually to enter the correct path).

Concerning integration: it seems Hugin is prepared to use different
blenders from the GUI, as the Stitcher tab shows a pulldown menu. It
would be most convenient of course if the items in that menu are
configurable through the options menu, so Smartblend can show up there
as well. For instance like the following:

Name: Enblend
Type: blender
Executable: path\to\enblend\enblend.exe
Parameters: --compression=%compression -f %widthx%height+%x0+%y0 -o
enblend-%out %in

Name: Smartblend
Type: blender
Executable: path\to\smartblend\smartblend.exe
Parameters: -o smartblend-%out %in

Name: Nona
Type: remapper
Executable: path\to\nona\nona.exe
Parameters: (whatever parameters apply)

Just an idea. Of course you still want most options to be configurable
through the GUI, but that's what placeholders can be used for (like
%in or %out).


On Oct 9, 4:20 pm, Yuval Levy <[EMAIL PROTECTED]> wrote:
> Bart.van.Andel wrote:
> > I just adapted Bob's bash script into a Windows batch file
>
> Thanks a lot. I've added it to SVN (rev. 3489) and will try not to
> forget to add it to the next Windows installer.
>
> 
>
> Yuv
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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Yuval Levy]

Bart.van.Andel wrote:
> I just adapted Bob's bash script into a Windows batch file

Thanks a lot. I've added it to SVN (rev. 3489) and will try not to 
forget to add it to the next Windows installer.



Yuv

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Bart.van.Andel]

I just adapted Bob's bash script into a Windows batch file, for usage
with Windows 2000 and up. Save the script at the end of this post to a
file named "smartblend-hugin.bat" and store it in the folder where
smartblend was installed.

Usage:
  1. Start Hugin.
  2. Open File -> preferences.
  3. Switch to Enblend tab.
  4. Check "Use alternative Enblend program".
  5. Choose "smartblend-hugin.bat" as the executable (use the full
path).
  6. Press OK to save the settings.
  7. On the Stitcher tab in Hugin, click the Options button next to
the Remapper and make sure "Save cropped images" is unchecked.
  8. Enjoy SmartBlend!


Script (everything below this line):

@echo off & setlocal

set SMARTBLEND=%~dp0\smartblend.exe
set SMARTBLENDARGS=

:paramstrip
set arg=%1
if not "%arg%"=="" (
if "%arg%"=="--compression" (
rem Skip compression parameter and its argument
shift
) else if "%arg:~0,2%"=="-f" (
rem Skip ...
) else if "%arg:~0,2%"=="-l" (
rem Skip ...
) else if "%arg:~0,2%"=="-o" (
rem Reformat output parameter: add "smartblend-" prefix
set SMARTBLENDARGS=%SMARTBLENDARGS% -o smartblend-%2
shift
) else (
rem Copy other parameters
set SMARTBLENDARGS=%SMARTBLENDARGS% %1
)
shift
goto :paramstrip
)

echo.
echo Executing smartblend.exe %SMARTBLENDARGS%
echo.

%SMARTBLEND% %SMARTBLENDARGS%

endlocal
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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[cspiel]

Kornel Benko wrote:
> --- snip ---
> I tried, with "./configure --enable-image-cache=no", but it is not compilable

What a bummer!  This could have been such a simple work-around.

Anyway, I have added the missing template specializations in the
following patch (which hopefully does not get mangled by the news
software).  Enblend compiles again when configured with
"--enable-image-cache=no" and produces the same output as with
enabled image cache after the patch has been applied (at least for
me :-)

HTH.
/Chris


--- a/include/vigra/cachedfileimage.hxx Mon Sep 29 09:38:54 2008 +0200
+++ b/include/vigra/cachedfileimage.hxx Mon Sep 29 15:52:50 2008 +0200
@@ -46,6 +46,7 @@
 #include 

 #include 
+#include 
 #include 
 #include 

@@ -2137,6 +2138,66 @@
 return
std::make_pair(ConstStridedCachedFileImageIterator(image.first,
xstride, ystride), image.second);
 };

+
+
+
+
+template 
+vigra::triple,
+  StridedImageIterator,
+  ImgAccessor>
+stride(int xstride, int ystride,
+   vigra::triple,
+ BasicImageIterator,
+ ImgAccessor> image) {
+Diff2D diff = image.second - image.first;
+if (diff.x % xstride != 0) {diff.x += xstride - diff.x %
xstride;}
+if (diff.y % ystride != 0) {diff.y += ystride - diff.y %
ystride;}
+return vigra::make_triple(
+StridedImageIterator(image.first, xstride,
ystride),
+StridedImageIterator(image.first + diff, xstride,
ystride),
+image.third);
+}
+
+
+template 
+vigra::triple,
+  ConstStridedImageIterator,
+  ImgAccessor>
+stride(int xstride, int ystride,
+   vigra::triple,
+ ConstBasicImageIterator,
+ ImgAccessor> image) {
+Diff2D diff = image.second - image.first;
+if (diff.x % xstride != 0) {diff.x += xstride - diff.x %
xstride;}
+if (diff.y % ystride != 0) {diff.y += ystride - diff.y %
ystride;}
+return vigra::make_triple(
+ConstStridedImageIterator(image.first, xstride,
ystride),
+ConstStridedImageIterator(image.first + diff,
xstride, ystride),
+image.third);
+}
+
+
+template 
+std::pair, ImgAccessor>
+stride(int xstride, int ystride,
+   std::pair,
ImgAccessor> image) {
+return std::make_pair(
+StridedImageIterator(image.first, xstride,
ystride),
+image.second);
+};
+
+
+template 
+std::pair, ImgAccessor>
+stride(int xstride, int ystride,
+   std::pair,
ImgAccessor> image) {
+return std::make_pair(
+ConstStridedImageIterator(image.first, xstride,
ystride),
+image.second);
+};
+
+
 } // namespace vigra

 #endif /* VIGRA_EXT_CACHEDFILEIMAGE_HXX */


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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Kornel Benko]

Am Thursday 25 September 2008 schrieb cspiel:
> 
> Michael -
> 
> Thanks for the backtrace!  As Kornel already suspected
> the information was not as helpful as I had wished.
> 
> However, the occurrence of "CachedFileImage"
> > 0x0810a0a6 in enblend::maskBounds > ()
> points to the change in the image cache.  Until Andrew
> locates the real problem, you could recompile Enblend with the
> image cache *disabled* and see whether this resolves the issue.
> Of course (on some machines) switching off the image cache
> severlely limits the size of the problems Enblend (and Enfuse)
> can tackle.

I tried, with "./configure --enable-image-cache=no", but it is not compilable
...
make[3]: Leaving directory `/mnt/usr2/src/enblend/enblend/src/win32helpers'
make[3]: Entering directory `/mnt/usr2/src/enblend/enblend/src'
g++ -DHAVE_CONFIG_H -I. -I..-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 
-I../include -DVIGRA_STATIC_LIB -I/usr/include/OpenEXR-O3 -ffast-math 
-DNDEBUG -Wall -MT enblend-enblend.o -MD -MP -MF .deps/enblend-enblend.Tpo -c 
-o enblend-enblend.o `test -f 'enblend.cc' || echo './'`enblend.cc
mask.h: In function ‘MaskType* enblend::createMask(const ImageType*, const 
ImageType*, const AlphaType*, const AlphaType*, const vigra::Rect2D&, const 
vigra::Rect2D&, bool) [with ImageType = 
vigra::BasicImage, 
std::allocator > >, AlphaType = 
vigra::BasicImage >, MaskType = 
vigra::BasicImage >]’:
enblend.h:265:   instantiated from ‘void 
enblend::enblendMain(std::list >&, vigra::ImageExportInfo&, 
vigra::Rect2D&) [with ImagePixelType = vigra::RGBValue]’
enblend.cc:825:   instantiated from here
mask.h:323: error: no matching function for call to ‘stride(int&, int&, 
vigra::triple, 
vigra::ConstBasicImageIterator, 
vigra::StandardConstValueAccessor >)’
mask.h:323: error: no matching function for call to ‘stride(int&, int&, 
std::pair, 
vigra::StandardConstValueAccessor >)’
...

> Sorry that I could not help you more, but not being able to
> reproduce the bug on my machines limits my possibilities.
> 
> /Chris

Kornel
-- 
Kornel Benko
[EMAIL PROTECTED]


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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Michael Galloway]

On Thu, Sep 25, 2008 at 09:45:06AM -0700, cspiel wrote:
> 
> Michael -
> 
> Thanks for the backtrace!  As Kornel already suspected
> the information was not as helpful as I had wished.
> 
> However, the occurrence of "CachedFileImage"
> > 0x0810a0a6 in enblend::maskBounds > ()
> points to the change in the image cache.  Until Andrew
> locates the real problem, you could recompile Enblend with the
> image cache *disabled* and see whether this resolves the issue.
> Of course (on some machines) switching off the image cache
> severlely limits the size of the problems Enblend (and Enfuse)
> can tackle.
> 
> Sorry that I could not help you more, but not being able to
> reproduce the bug on my machines limits my possibilities.
>

i understand, i have a working copy of enblend, so its not a show stopper (and
indeed, sadly, not been generating images very much this summer as well). thanks
for looking into it.

-- michael 

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[cspiel]

Michael -

Thanks for the backtrace!  As Kornel already suspected
the information was not as helpful as I had wished.

However, the occurrence of "CachedFileImage"
> 0x0810a0a6 in enblend::maskBounds > ()
points to the change in the image cache.  Until Andrew
locates the real problem, you could recompile Enblend with the
image cache *disabled* and see whether this resolves the issue.
Of course (on some machines) switching off the image cache
severlely limits the size of the problems Enblend (and Enfuse)
can tackle.

Sorry that I could not help you more, but not being able to
reproduce the bug on my machines limits my possibilities.

/Chris

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Erik Krause]

Am Wednesday, September 24, 2008 um 20:07 schrieb Yuval Levy:

> > I hope he'll use the smartblend page on the wiki to publish the 
> > source...
> 
> a wiki is good for documentation. for code it is inadequate. the best 
> place for soure code is a version control system, like SVN available at 
>  or at Google project hosting 
> 

Most likely Michael won't use any such system. This will be our duty 
;-)

best regards
--
Erik Krause
Offenburger Str. 33
79108 Freiburg


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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Yuval Levy]

Erik Krause wrote:
> I hope he'll use the smartblend page on the wiki to publish the 
> source...

a wiki is good for documentation. for code it is inadequate. the best 
place for soure code is a version control system, like SVN available at 
 or at Google project hosting 


Yuv

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Erik Krause]

On Wednesday, September 24, 2008 at 7:03, Bart.van.Andel wrote:

> Sounds like a nice promise! I pointed him to this group for informing
> us when he does.

A nice promise indeed. I always wanted to convince him to make it 
open source.

I hope he'll use the smartblend page on the wiki to publish the 
source...

best regards
Erik Krause
http://www.erik-krause.de


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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Bart.van.Andel]

On Sep 23, 6:51 pm, Bob Bright <[EMAIL PROTECTED]> wrote:
> For the record: I'm not a fan of closed software.  I'm using smartblend
> (for the time being) only because [...]

Actually I emailed Michael Norel (the author of SmartBlend) about it
earlier this month, asking whether development had stopped at 1.2.5.
In turn, he replied that:
"It is true, the development of SB is freezed.   Just because i have
other , very nice projects. At least i'll find time to publicsh
sources."

Sounds like a nice promise! I pointed him to this group for informing
us when he does.

Cheers, Bart
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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Michael Galloway]

On Wed, Sep 24, 2008 at 02:07:57AM -0700, cspiel wrote:
> 
> Michael -
> 
> Michael Galloway wrote:
> > is the segfault with enblend cvs resolved?
> 
> At least I cannot reproduce it with the latest CVS version
> on my machine
> $ uname -a
> Linux beliskner 2.4.36 #3 SMP Thu Feb 14 15:51:55 CET 2008 i686
> GNU/Linux
> and my compiler
> $ gcc --version
> gcc (GCC) 4.3.2
> However, this doesn't prove the bug went away.
> 
> Could you please give it a spin?  If you run into a segfault
> a backtrace would be helpful.
> 
> Cheers,
> Chris
>

same for me:

(gdb) set args --compression NONE -f1042x766 -o test.tif test.tif 
test0001.tif
(gdb) run
Starting program: /usr/local/bin/enblend --compression NONE -f1042x766 -o 
test.tif test.tif test0001.tif
[Thread debugging using libthread_db enabled]
Input images to small for coarse mask, switching to fine mask.
Loading next image: test.tif
Loading next image: test0001.tif
Creating blend mask: 1/4 2/4 3/4 4/4
Optimizing 1 distinct seam.
Strategy 1, s0: 1/4 2/4 3/4 4/4
Strategy 2: s0
[New Thread 0xb7a476d0 (LWP 5684)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb7a476d0 (LWP 5684)]
0x0810a0a6 in enblend::maskBounds > ()
Current language:  auto; currently asm

i'm using opensuse 11.0,

gcc version 4.3.1 20080507 (prerelease) [gcc-4_3-branch revision 135036] (SUSE 
Linux)
 enblend, version 3.2-cvs 

hope this helps some. 

-- michael


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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Kornel Benko]

Am Wednesday 24 September 2008 schrieb cspiel:
> 
> Michael -
> 
> Michael Galloway wrote:
> > is the segfault with enblend cvs resolved?
> 
> At least I cannot reproduce it with the latest CVS version
> on my machine
> $ uname -a
> Linux beliskner 2.4.36 #3 SMP Thu Feb 14 15:51:55 CET 2008 i686
> GNU/Linux
> and my compiler
> $ gcc --version
> gcc (GCC) 4.3.2
> However, this doesn't prove the bug went away.

On my machine it is 
Linux dell64 2.6.22.17-0.1-default #1 SMP 2008/02/10 20:01:04 UTC x86_64 x86_64 
x86_64 GNU/Linux

and here enblend still segfaults.

> Could you please give it a spin?  If you run into a segfault
> a backtrace would be helpful.

I have a backtrace, but not very helpfull.


Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /usr/lib64/libXau.so.6...done.
Loaded symbols for /usr/lib64/libXau.so.6
Core was generated by `enblend -o xb.tif -v -m 400 -l 20 -w -a --fine-mask 
--optimize xa0005.tif x'.
Program terminated with signal 11, Segmentation fault.
#0  0x004f676e in enblend::maskBounds > ()
(gdb) bt
#0  0x004f676e in enblend::maskBounds > ()
#1  0x0063a17e in enblend::enblendMain > ()
#2  0x00408d42 in main ()
(gdb)

> Cheers,
> Chris

Kornel
-- 
Kornel Benko
[EMAIL PROTECTED]


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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[cspiel]

Michael -

Michael Galloway wrote:
> is the segfault with enblend cvs resolved?

At least I cannot reproduce it with the latest CVS version
on my machine
$ uname -a
Linux beliskner 2.4.36 #3 SMP Thu Feb 14 15:51:55 CET 2008 i686
GNU/Linux
and my compiler
$ gcc --version
gcc (GCC) 4.3.2
However, this doesn't prove the bug went away.

Could you please give it a spin?  If you run into a segfault
a backtrace would be helpful.

Cheers,
Chris

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Tony Gieske]

Sorry to bother you, but I didn't mean to ask for all the messages on this 
group to be mailed to me. I can't seem to reach the group source itself. Can 
you help me?

 
Regards, 
 
Tony Gieske



- Original Message 
From: Jim Watters <[EMAIL PROTECTED]>
To: hugin-ptx@googlegroups.com
Sent: Tuesday, September 23, 2008 4:44:03 PM
Subject: [hugin-ptx] Re: Smartblend: Potential use with Hugin

 Erik Krause wrote: 
On Monday, September 22, 2008 at 16:04, Bob Bright wrote:

I still get fewer blending artifacts around the zenith with smartblend
than with enblend, and using enblend's maximum number of blending levels
doesn't affect this.  E.g., compare the following two zeniths, the first
created by enblend with -l 29, the second by smartblend at default
settings:

http://VictoriaVR.ca/test/enblend-zenith.jpg
http://VictoriaVR.ca/test/smartblend-zenith.jpg

Interesting. I never got anything alike with enblend, but of course I 
use a zenith shot.

Did you try the --fine_mask option?

best regards
Erik Krause
http://www.erik-krause.de

I am guessing you are shooting 4 around with a circular fisheye.
You could tilt the whole pan head so one image has dominance for the
zenith.
There is nothing that says the camera needs to be level on the tripod.
But this does not help for already shot panos.


-- 
Jim Watters

Yahoo ID: j1vvy ymsgr:sendIM?j1vvy
jwatters @ photocreations . ca
http://photocreations.ca


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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Jim Watters]

Erik Krause wrote:

  On Monday, September 22, 2008 at 16:04, Bob Bright wrote:
  
  
I still get fewer blending artifacts around the zenith with smartblend
than with enblend, and using enblend's maximum number of blending levels
doesn't affect this.  E.g., compare the following two zeniths, the first
created by enblend with -l 29, the second by smartblend at default
settings:

http://VictoriaVR.ca/test/enblend-zenith.jpg
http://VictoriaVR.ca/test/smartblend-zenith.jpg

  
  Interesting. I never got anything alike with enblend, but of course I 
use a zenith shot.

Did you try the --fine_mask option?

best regards
Erik Krause
http://www.erik-krause.de
  

I am guessing you are shooting 4 around with a circular fisheye.
You could tilt the whole pan head so one image has dominance for the
zenith.
There is nothing that says the camera needs to be level on the tripod.
But this does not help for already shot panos.

-- 
Jim Watters

Yahoo ID: j1vvy ymsgr:sendIM?j1vvy
jwatters @ photocreations . ca
http://photocreations.ca


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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Erik Krause]

On Monday, September 22, 2008 at 16:04, Bob Bright wrote:

> I still get fewer blending artifacts around the zenith with smartblend
> than with enblend, and using enblend's maximum number of blending levels
> doesn't affect this.  E.g., compare the following two zeniths, the first
> created by enblend with -l 29, the second by smartblend at default
> settings:
> 
> http://VictoriaVR.ca/test/enblend-zenith.jpg
> http://VictoriaVR.ca/test/smartblend-zenith.jpg

Interesting. I never got anything alike with enblend, but of course I 
use a zenith shot.

Did you try the --fine_mask option?

best regards
Erik Krause
http://www.erik-krause.de


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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Bob Bright]

Thanks, Yuv.

For the record: I'm not a fan of closed software.  I'm using smartblend
(for the time being) only because it makes my production work a little
more efficient, and I'm not clever enough to figure out how to make
enblend play nicely with the zenith.  But make no mistake: It's Andrew
Mihal's work on enblend and enfuse which paved the way for other
blenders and fusers.  I want to thank him from the bottom of my heart,
and I happily look forward to the day when I can go back to using
enblend full time.

Cheers,
BBB

On Tue, 2008-09-23 at 03:52 -0700, Yuv wrote:

> Bob Bright wrote:
> > Yes, smartblend can be used with hugin.
> 
> thanks a lot for that, Bob. I've added it to SVN (r3451) in platforms/
> linux.
> Yuv
> > 

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Michael Galloway]

On Tue, Sep 23, 2008 at 07:56:18AM -0700, cspiel wrote:
> 
> I was talking about the Enblend/Enfuse CVS repository,
> as Enblend and Enfuse had the "too little levels" problem,
> which should be fixed now.
> 
> Sorry if I have mislead you!  I hack on Enfuse only and don't
> know anything about Smartblend.
> 
> HTH,
> Chris
> 
> PS: Correction to my original post: Enfuse's contrast weighting
> uses an O(n) algorithm, not O(1), where n is the size of the
> contrast-mask window.
>

is the segfault with enblend cvs resolved?

-- michael
 

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[cspiel]

Hello Harry -

Harry van der Wolf wrote:
> Where can I find the Smartblend CVS (it's even hidden for Google) and does
> it compile on OSX?

I was talking about the Enblend/Enfuse CVS repository,
as Enblend and Enfuse had the "too little levels" problem,
which should be fixed now.

Sorry if I have mislead you!  I hack on Enfuse only and don't
know anything about Smartblend.

HTH,
Chris

PS: Correction to my original post: Enfuse's contrast weighting
uses an O(n) algorithm, not O(1), where n is the size of the
contrast-mask window.

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Harry van der Wolf]

Hi Chris,

Where can I find the Smartblend CVS (it's even hidden for Google) and does
it compile on OSX?

Harry


2008/9/23 cspiel <[EMAIL PROTECTED]>

>
> Erik Krause wrote:
> > enblend uses a not so optimal number of levels. specify -l 20 at the
> > enblend command line to increase the number to the maximum and you
> > get results similar to smartblend. enblend 3 should be almost as fast
> > as smartblend BTW...
>
> Enfuse used to employ exactly one level less than the
> maximum allowed number of levels given a particular
> kernel and image size.  This issue has been fixed in
> CVS on 2008-09-13T21:15:02.  Please let me know if
> any problem related to the levels calculation persists
> and I have to rework my patch.
>
> Concerning the performance of Enfuse-3.2: Contrast
> weighting is _much_ faster because of the new, O(1)
> algorithm.  Saturation weighting could have become
> slightly faster, too.
>
>
> /Chris
>
> >
>

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[cspiel]

Erik Krause wrote:
> enblend uses a not so optimal number of levels. specify -l 20 at the
> enblend command line to increase the number to the maximum and you
> get results similar to smartblend. enblend 3 should be almost as fast
> as smartblend BTW...

Enfuse used to employ exactly one level less than the
maximum allowed number of levels given a particular
kernel and image size.  This issue has been fixed in
CVS on 2008-09-13T21:15:02.  Please let me know if
any problem related to the levels calculation persists
and I have to rework my patch.

Concerning the performance of Enfuse-3.2: Contrast
weighting is _much_ faster because of the new, O(1)
algorithm.  Saturation weighting could have become
slightly faster, too.


/Chris

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Yuv]

Bob Bright wrote:
> Yes, smartblend can be used with hugin.

thanks a lot for that, Bob. I've added it to SVN (r3451) in platforms/
linux.
Yuv
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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Bob Bright]

On Mon, 2008-09-22 at 23:57 +0200, Erik Krause wrote:


> enblend uses a not so optimal number of levels. specify -l 20 at the 
> enblend command line to increase the number to the maximum and you 
> get results similar to smartblend. enblend 3 should be almost as fast 
> as smartblend BTW...


I still get fewer blending artifacts around the zenith with smartblend
than with enblend, and using enblend's maximum number of blending levels
doesn't affect this.  E.g., compare the following two zeniths, the first
created by enblend with -l 29, the second by smartblend at default
settings:

http://VictoriaVR.ca/test/enblend-zenith.jpg
http://VictoriaVR.ca/test/smartblend-zenith.jpg

There's still a slight artifact in the smartblended example, but it's
barely noticeable, and much easier to patch satisfactorily than the
enblend example.

Cheers,
BBB


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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Bob Bright]

Yes, smartblend can be used with hugin.  I've also found that smartblend
does a better job than enblend in some circumstances (specifically, less
patching to do at the zenith), and am now using it for most of my
production work.

However, recent hugin builds pass arguments to the blender specified in
Preferences which smartblend doesn't understand, so they need to be
stripped in order for smartblend to work.  You didn't say what kind of
system you're working on.  The instructions below are for linux, but I'm
sure something similar will work on other systems.  If you're not sure
how to set it up on Windows or Mac, just ask and some of the resident
experts can help you out.

1. Install wine if you don't already have it, from your distribution's
standard repositories or from http://www.winehq.org/.  (Smartblend.exe
runs fine on linux under wine.)

2. Download smartblend from http://wiki.panotools.org/SmartBlend and
unzip the archive to a convenient location.  Open a terminal in that
location and enter "wine smartblend.exe", just to make sure everything
is working so far.  You should get a usage message from smartblend.exe.

3. Save the following script as "smartblend" somewhere in your path, and
make it executable.  Edit the third line to point to where you unzipped
smartblend.exe in the previous step.  The purpose of the script is to
strip out the offending arguments which hugin is passing to the blender.
It also prepends "smartblend-" to the output filename, so you won't
inadvertently overwrite a file that you've blended with enblend.

 #!/bin/bash
 #
 SMARTBLEND=/home/bbb/bin/smartblend_1_2_5/smartblend.exe
 SMARTBLENDARGS=`echo $* \
| sed -r "s/--compression NONE //" \
| sed -r "s/--compression PACKBITS //" \
| sed -r "s/--compression LZW //" \
| sed -r "s/--compression DEFLATE //" \
| sed -r "s/-f *[0-9]+x[0-9]+ //" \
| sed -r "s/-l *[0-9]+ //" \
| sed -r "s/-o +([[:alnum:]]+)/-o smartblend-\1/"`
 echo -e "\nExecuting smartblend.exe $SMARTBLENDARGS\n"
 wine $SMARTBLEND $SMARTBLENDARGS
 exit 0

4. Now start up hugin, select File -> Preferences -> Enblend, and enter
"smartblend" as the "Enblend executable".  Leave "Default Arguments"
blank.  You should be good to go: generating a blended panorama from the
Stitcher tab in hugin should now produce a smartblended panorama.

Cheers,
BBB

On Mon, 2008-09-22 at 13:05 -0700, irv wrote:

> I have been a Hugin user for several yearsand must congratulate Pablo
> and the team of contributors for their outstanding acheivements.  My
> primary usage of Hugin is to generate a higher resolution image, from
> which I can print large (24"x36") prints. I typically will shoot a
> matrix; 2x2, 3x3, 3x5 and higher. I highly recommend the use of a
> tripod to minimize image motion, but have often shot handheld when the
> shutter speed is relatively fast. The robustness of the algorithms in
> Hugin and Ptgui have increased exponentially (at least to me) in the
> past years-I whimsically shot a series of images in Yosemite N.P. at
> Glacier Pt. of the entire valley. By this I mean I paid little
> attention to leveling, overlap in x&y, I think the array was a
> "drunken" 4x5! The stitched imaged, however, was quite sober! Very
> impressive.
> 
> To my question:  Are there any plans to permit Smartblend to be used
> with Hugin?  When Enblend doesnt get the 'sky' just  right I find that
> Smartblend (with PTgui) does quite better and much faster. The
> difference is attributeable to Smartblend, if I use Enblend with Ptgui
> the results are similar with Hugin.
> 
> Thanks to todays 'Pano' programs I have an adjustable 'infinite wide
> angle lens' (my 24-70) without the distortions created by the 10-20,
> 12-24 ultra wides, plus my normal perspective is maintained.
> 
> Keep up the great work!!!
> > 

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[hugin-ptx] Re: Smartblend: Potential use with Hugin

[Erik Krause]

On Monday, September 22, 2008 at 13:05, irv wrote:

> To my question:  Are there any plans to permit Smartblend to be used
> with Hugin?  When Enblend doesnt get the 'sky' just  right I find that
> Smartblend (with PTgui) does quite better and much faster. The
> difference is attributeable to Smartblend, if I use Enblend with Ptgui
> the results are similar with Hugin.

enblend uses a not so optimal number of levels. specify -l 20 at the 
enblend command line to increase the number to the maximum and you 
get results similar to smartblend. enblend 3 should be almost as fast 
as smartblend BTW...

best regards
Erik Krause
http://www.erik-krause.de


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