Re: [hugin-ptx] Shooting and stitching to make Giclee prints

[David W. Jones]

Hmm, I'd think that moving the camera on a tripod would be easier than 
moving the painting, when it comes to keeping the camera the same 
distance from the painting.


Once you position the camera, you might drop a plumb line from bottom 
center of tripod, let it hang straight, mark the distance of that point 
from the painting, then mark that point. Then measure and mark another 
other point the same distance from the painting but out from the other 
half of the painting. Then draw a line between the two points and you 
have a line to center the tripod on when you move it left/right.


You can minimize the number of tripod moves by shooting top left, bottom 
left, bottom right, top right. Then you only have to raise or lower the 
camera on the tripod. But you knew that already.


Don't forget vignetting.

On 11/04/2015 01:56 PM, Terry Duell wrote:

Hello All,
I have become involved in a project to help an artist friend prepare an
image of a painting to be used to make giclee prints, and I'm looking
for any thoughts on what I should do to get it right and what to avoid.
To date, my friend has had his paintings photographed commercially, with
a medium to large format film camera, the transparency then scanned on a
drum scanner to produce an image that would print at original size at
300 ppi.
I'll be shooting with a Pentax K-3 II (aps-c sensor), and aim to shoot a
2x2 pattern with about 30% overlap vertically and about 50% overlap
horizontally...that's roughly how it works out from the painting and
sensor proportions.
I'll shoot from a weighted tripod, using pixel shift mode, and at this
stage thinking about using a 150-450 lens at about 300mm.
The intention is to set the painting vertical on a stand, with lighting
each side at about 45 deg.
It is a simple matter to set the camera at the correct height shooting
horizontally, but not quite as simple to ensure we are normal to the
painting in the horizontal plane. I would like to try to minimise any
perspective effects as much as possible. The thinking at the moment is
to move the painting vertically and horizontally on a fixed easel to
align for each shot, rather than move the camera. I think we can better
keep the shots normal to the painting by this method.
That's probably enough to be going on with...any thoughts?

Cheers,



--
David W. Jones
gnomeno...@gmail.com
wandering the landscape of god
http://dancingtreefrog.com

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[hugin-ptx] Shooting and stitching to make Giclee prints

[Terry Duell]

Hello All,
I have become involved in a project to help an artist friend prepare an  
image of a painting to be used to make giclee prints, and I'm looking for  
any thoughts on what I should do to get it right and what to avoid.
To date, my friend has had his paintings photographed commercially, with a  
medium to large format film camera, the transparency then scanned on a  
drum scanner to produce an image that would print at original size at 300  
ppi.
I'll be shooting with a Pentax K-3 II (aps-c sensor), and aim to shoot a  
2x2 pattern with about 30% overlap vertically and about 50% overlap  
horizontally...that's roughly how it works out from the painting and  
sensor proportions.
I'll shoot from a weighted tripod, using pixel shift mode, and at this  
stage thinking about using a 150-450 lens at about 300mm.
The intention is to set the painting vertical on a stand, with lighting  
each side at about 45 deg.
It is a simple matter to set the camera at the correct height shooting  
horizontally, but not quite as simple to ensure we are normal to the  
painting in the horizontal plane. I would like to try to minimise any  
perspective effects as much as possible. The thinking at the moment is to  
move the painting vertically and horizontally on a fixed easel to align  
for each shot, rather than move the camera. I think we can better keep the  
shots normal to the painting by this method.

That's probably enough to be going on with...any thoughts?

Cheers,
--
Regards,
Terry Duell

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Re: [hugin-ptx] Alignment of multi-row images

[T. Modes]

Am Mittwoch, 4. November 2015 16:15:22 UTC+1 schrieb Mike Cowlishaw:
>
> OK, many thanks .. working through the documentation on those and building 
> a script; will report in due course.  
>

That would be nice. There is no much feedback for this workflow/tools.
 

> The documentation for pto_var is especially skimpy.  
>

I know. It requires some knowledge of the pto file format. Until now nobody 
helped with this.
The easiest way is to have a look on the photos tab for an existing 
project. There you will find all variables (and it short character)
 

> Are the constants you suggest (13, 27, 9) in degrees?  The functions seem 
> to work in radians.   
>

Yes, yaw, pitch and roll are in degree.
Your example images have a horizontal field of view of about 22 deg. With 
an estimated overlap of 40 % you will get an delta yaw of 13 deg.
For pitch this is similar: The vertical field of view is about 16 deg. So 
you get an delta pitch of 9 deg. The 27 is to get the middle image of each 
row near to the horizon. This last one would not be strictly necessary.

An easier way is to use a subset (maybe all rows, but only 2 columns), run 
the assistant and look on the photo tab and deduce the necessary 
angle/formulas.
(Or load a subset of images and move them with the drag tool to raw 
positions and then look on the photos tab.)

Also I assume the origin for the positions is bottom-left.
>
> No. It is a spherical coordinate system with 0,0 in the middle. 
cpfind is using the full sphere for calculation. So the origin is not so 
important, because the 0-360/-90-+90 deg boundary is taken into account.

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Re: [hugin-ptx] Alignment of multi-row images

[Mike Cowlishaw]

OK, many thanks .. working through the documentation on those and building
a script; will report in due course.   The documentation for pto_var is
especially skimpy.   Are the constants you suggest (13, 27, 9) in degrees?
The functions seem to work in radians.   Also I assume the origin for the
positions is bottom-left.

Mike

On Tue, Nov 3, 2015 at 7:40 PM, T. Modes  wrote:

>
> Am Dienstag, 3. November 2015 16:09:07 UTC+1 schrieb Mike Cowlishaw:
>>
>> It should be able to cope with up-down patterns just as well as
>> left-right, and zig-zag arrangements should work as well.
>>
>>>
>>> Unless there are gaps or featureless areas, like blue sky, it's
>>> difficult to say what the problem is, can you upload a sample somewhere?
>>>
>>
>> Ah, thanks, that has prompted me to do some more experiments.  I can
>> process more than half the images without problems, but there are indeed 4
>> (of the 72) that are featureless white sky (necessarily/deliberately
>> overexposed), and the 'unconnected groups' messages appear when they are
>> part of the selected source images.
>>
>> I'm not sure what to do in this case: I am invited to add control points,
>> but there can be none?.
>>
>
> With the featureless images it becomes a little bit more complicated, but
> not impossible.
> Have a look at the geocpset tool http://wiki.panotools.org/Geocpset
>
>
>>
>> I've uploaded the rightmost 4 columns (24 JPGs) as a sample that 'fails'
>> (and also shows the less-than-ideal initial display of images), at
>> http://speleotrove.com/testpan.zip -- any suggestions on how to proceed
>> would be much appreciated!
>>
>
> For your test set the sequence would be something like:
> pto_gen --output=project.pto *.pto
> pto_var "--set=y=floor(i/6)*13,p=27-(i%6)*9" --output=project.pto
> project.pto
> cpfind --output=project.pto --prealigned project.pto
> geocpset --output=project.pto project.pto
>
> (Quoting is for Windows.)
>
> For your full project you will need to adopt probably the parameters for
> pto_var.
>
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Re: [hugin-ptx] Hugin fails to start

[Island Center for the Arts]

Thanks Carl and to Stefan -
2013.0.0 opens successfully.
I very much appreciate your help and advice!
Tom

On Nov 4, 2015, at 12:27 PM, zarl wrote:

> There is no OS X build for Hugin 2015.0.0 yet. If you want to download 
> 2013.0.0 again just download it from the directory of that version:
> http://sourceforge.net/projects/hugin/files/hugin/hugin-2013.0/
> 
> Carl
> 
> Am Mittwoch, 4. November 2015 09:01:17 UTC+1 schrieb Tom:
> Thank you Stefan 
> > Please let us know 
> > 
> > * under which operating system you have encountered this 
> I have Snow Leopard (MacOS 10.6.80 installed. 
> 
> > * where did you get your hugin version from 
> http://hugin.sourceforge.net/download/ 
>   
> > * if you have upgraded recently from an older Hugin version and, 
> >  if yes, from which version. 
> Sorry but I'm not sure. It may have been version 2013.0.0 which worked 
> wonderfully. I probably tried to download 2015.0.0 when it came out but was 
> only able to download 2014.0.0 most likely due to OS limitations. Is there a 
> way to reinstall 2013.0.0?
> 
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Re: [hugin-ptx] Re: Requires HUGIN Server Process expert

[Carlos Eduardo G. Carvalho (Cartola)]

Hi, one problem is that I'm too busy nowadays and the main problem is that
I can't make a good automatic stitching with your images. I don't even know
if it's possible. As far as my limited expertise tells me, it is not
possible to solve this level of parallax using hugin. You are taking
pictures of very small places. When I have this level of parallax in my
pictures I just solve the errors with manual stitching and a lot of manual
post editing in GIMP.

Bests,



Carlos E G Carvalho (Cartola)
http://cartola.org/360
http://www.panoforum.com.br/

2015-11-02 7:42 GMT-02:00 Lada :

>
> Carlos, thank you for your answer!
>
>  Let me explain the situation once again and answer the questions you
> asked. Forgive me if i'll miss some important details, as i said, i'm not
> expert in this area, so feel free to ask for information.
>
> Earlier when we used our old device (that's one our own design), we put in
> server Hugin .opt that we had got from desktop Hugin after stitching
> panoramas of this device. And thanks to that .opt we got good results. That
> device had only one camera module and was rotated by panohead (another one
> our own design). And that stitching was pretty good.
> Then we've made our custom assembly, that has 4 5MP camera models with
> fisheye lens. There are 60 degrees between the central axis of the lens of
> horisontal and vertical pairs of camera modules.
>
> 
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Assemble doesn't imply a panohead, all 4 modules are placed as close to
> each other as it's possible and are rotated on monopod around the least
> point of parallax.
>
> We've chose this way, 'cause it make shooting process faster.
>
>
> We tried to use old .opt, but it didn't work well. That's why we are
> searching for hugin expert.
>
> So if this information helps you to get good results, we'll glad to work
> with you, and we are waiting for your proposals about the cost of
> co-operation and timing of your work.
>
> воскресенье, 25 октября 2015 г., 18:46:38 UTC+3 пользователь Lada написал:
>>
>> Hello!
>>
>> We are looking for the HUGIN Server Process expert.
>> Previously we liked results of HUGIN web service API work, but after
>> changing the device that takes pictures for panoramas, panoramas stitch
>> became very bad. Now the device consist of 4 camera module located as close
>> to each other as possible. When photographer press a button all 4 cameras
>> take a picture. After that, photographer turns the device 120 degrees and
>> pushes a button (+ 4 pictures), rotates 120 and presses again (+ 4
>>  pictures). Thus we have 12 pictures to stitch the panorama.
>> Although cameras are positioned as close as possible, there are problems
>> with parallax. Because of this, problems with detecting control points
>> exist. However, other software (Autopano) gives good results.
>> We are looking for someone who can help us adjust HUGIN api to get
>> results not worse than we are now receiving from the Autopano.
>> I attached a link to 5 folders with source pictures for the panoramas and
>> the results we got when had stitched them with the Autopano.
>> https://drive.google.com/drive/u/1/folders/0B7LQ8sYQPdl7RXhLTWpNWEt1LTg
>>
>> Please try to make panoramas, and if you find the parameters that can be
>> set in HUGIN Server Process for good automatically stitching, contact me by
>> e-mail (), we will be happy to cooperate with you. Please write in a
>> letter to the desired reward, what time you'll need and attach the results
>> of stitching that you will got.
>>
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Re: [hugin-ptx] Hugin fails to start

[zarl]

There is no OS X build for Hugin 2015.0.0 yet. If you want to download 
2013.0.0 again just download it from the directory of that version:
http://sourceforge.net/projects/hugin/files/hugin/hugin-2013.0/

Carl

Am Mittwoch, 4. November 2015 09:01:17 UTC+1 schrieb Tom:
>
> Thank you Stefan 
> > Please let us know 
> > 
> > * under which operating system you have encountered this 
> I have Snow Leopard (MacOS 10.6.80 installed. 
>
> > * where did you get your hugin version from 
> http://hugin.sourceforge.net/download/ 
>   
> > * if you have upgraded recently from an older Hugin version and, 
> >  if yes, from which version. 
> Sorry but I'm not sure. It may have been version 2013.0.0 which worked 
> wonderfully. I probably tried to download 2015.0.0 when it came out but was 
> only able to download 2014.0.0 most likely due to OS limitations. Is there 
> a way to reinstall 2013.0.0?
>

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Re: [hugin-ptx] Hugin fails to start

[Island Center for the Arts]

Thank you Stefan 
> Please let us know
> 
> * under which operating system you have encountered this
I have Snow Leopard (MacOS 10.6.80 installed.

> * where did you get your hugin version from
http://hugin.sourceforge.net/download/
 
> * if you have upgraded recently from an older Hugin version and,
>  if yes, from which version.
Sorry but I'm not sure. It may have been version 2013.0.0 which worked 
wonderfully. I probably tried to download 2015.0.0 when it came out but was 
only able to download 2014.0.0 most likely due to OS limitations. Is there a 
way to reinstall 2013.0.0?

Tom

On Nov 3, 2015, at 10:50 PM, Stefan Peter wrote:

> Hi Tom
> 
> On 03.11.2015 19:02, Island Center for the Arts wrote:
>> I had been using Hugin (2014.0.0) for successfully for a while. One day
>> when opening Hugin I got this message on top of the front window...
>> 
>> " wxWidgets DeBug Alert
>> ../src/common/menucmm.cpp(693):assert"!m_menuBar" failed in
>> attach():attaching menu twice?
>> Do you want to stop the program?
>> You can also choose [Cancel] to suppress further warnings. "
>> 
>> Choosing "cancel" or any other button ("no" "yes") doesn't do anything,
>> the window remains and Hugin needs to be force quit.
>> The same happens every time.
> 
> Please let us know
> 
> * under which operating system you have encountered this
> * where did you get your hugin version from
> * if you have upgraded recently from an older Hugin version and,
>  if yes, from which version.
> 
> With kind regards
> 
> Stefan Peter
> 
> -- 
> Any technology that does not appear magical is insufficiently advanced.
> ~ Gregory Benford
> 
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Re: [hugin-ptx] Hugin fails to start

[Island Center for the Arts]

Checking my photo archives it appears that I began using Hugin in September 
2011.
So I may have been  using 2011.2.0 before upgrading.

2011.2.0 released September 2011
Tom


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