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

[Paul Womack]

That's why I asked about the shooting pattern and physical size.

I concur with using a pano head and "normal" stitching.

 BugBear

On 8 November 2015 at 13:06, panostar  wrote:

> Terry, Your camera with a 300mm lens will be quite a long way from the
> canvas.  If you have a spherical panorama head, I would use that and stitch
> as a conventional panorama rather than use mosaic mode.
>
> John
>
> On Saturday, November 7, 2015 at 10:38:21 PM UTC, Tduell wrote:
>>
>> Hello Paul,
>>
>> On Sun, 08 Nov 2015 00:05:09 +1100, Paul Womack 
>> wrote:
>>
>> > Pardon my dumbness; it's seems (from the thread) you're talking about
>> > shooting a mosaic style set; in this context what is a  "2x2 pattern"
>> > (since I suspect the full matrix will be more 8x13 images or whatever).
>> >
>>
>> Yes, it will be shot in mosaic mode.
>> The 2x2 pattern is simply 2 rows, 2 columns, 4 shots in total.
>>
>> > Second - how big is the physical painting?
>>
>> The painting is 760x560mm.
>>
>> Cheers,
>> --
>> Regards,
>> Terry Duell
>>
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Re: [hugin-ptx] Shooting and stitching to make Giclee prints

[panostar]

Terry, Your camera with a 300mm lens will be quite a long way from the 
canvas.  If you have a spherical panorama head, I would use that and stitch 
as a conventional panorama rather than use mosaic mode.

John

On Saturday, November 7, 2015 at 10:38:21 PM UTC, Tduell wrote:
>
> Hello Paul, 
>
> On Sun, 08 Nov 2015 00:05:09 +1100, Paul Womack  >   
> wrote: 
>
> > Pardon my dumbness; it's seems (from the thread) you're talking about 
> > shooting a mosaic style set; in this context what is a  "2x2 pattern" 
> > (since I suspect the full matrix will be more 8x13 images or whatever). 
> > 
>
> Yes, it will be shot in mosaic mode. 
> The 2x2 pattern is simply 2 rows, 2 columns, 4 shots in total. 
>
> > Second - how big is the physical painting? 
>
> The painting is 760x560mm. 
>
> Cheers, 
> -- 
> Regards, 
> Terry Duell 
>

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

[dgjohnston]

Terry, at 6.5m and with a relatively flat painting I can't see there being 
anything to produce parallax errors. Or am I showing my naivety here? Feel free 
to let me know if I'm out to lunch on this! ;o)I'd try experimenting with just 
rotating the camera and doing a normal piano stitch.


Sent from my Samsung device

 Original message 
From: Terry Duell  
Date: 2015-11-08  3:20 PM  (GMT-06:00) 
To: hugin-ptx@googlegroups.com 
Subject: Re: [hugin-ptx] Shooting and stitching to make Giclee prints 

Hello John,

On Mon, 09 Nov 2015 00:06:31 +1100, panostar   
wrote:

> Terry, Your camera with a 300mm lens will be quite a long way from the
> canvas.  If you have a spherical panorama head, I would use that and  
> stitch as a conventional panorama rather than use mosaic mode.
>

I think the camera will be about 6.5m from the painting, but I don't have  
a pano head, hence the current obsession with mosaic mode.
There will be quite a lot of experimental stuff going on at the time, and  
one is to shoot a conventional pano, but I have been thinking that mosaic  
mode would be my best approach.
Thanks for your thoughts on this.

Cheers,
-- 
Regards,
Terry Duell

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

[Terry Duell]

Hello John,

On Mon, 09 Nov 2015 00:06:31 +1100, panostar   
wrote:



Terry, Your camera with a 300mm lens will be quite a long way from the
canvas.  If you have a spherical panorama head, I would use that and  
stitch as a conventional panorama rather than use mosaic mode.




I think the camera will be about 6.5m from the painting, but I don't have  
a pano head, hence the current obsession with mosaic mode.
There will be quite a lot of experimental stuff going on at the time, and  
one is to shoot a conventional pano, but I have been thinking that mosaic  
mode would be my best approach.

Thanks for your thoughts on this.

Cheers,
--
Regards,
Terry Duell

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

[Terry Duell]

Hello Paul,

On Mon, 09 Nov 2015 08:29:39 +1100, Paul Womack   
wrote:



Moving the painting would, unless your lighting is perfectly uniform,
involve moving the painting w.r.t. the lights, which might make a perfect
stitch impossible.


Yes that is an issue, and we have more or less decided that keeping the  
painting in a fixed position is probably the better method.


I would (quite strongly) recommend a pano head, home made if need be.  
Given the lack of major 3d features on a painting it needn't be perfect.


It would be nice to have one, but won't be tackling the home made solution.



I would certainly do test shoots with a cheap poster, or something.


This is a test shoot.

Thanks for your advice.

Cheers,
--
Regards,
Terry Duell

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

[Paul Womack]

Moving the painting would, unless your lighting is perfectly uniform,
involve moving the painting w.r.t. the lights, which might make a perfect
stitch impossible.

I would (quite strongly) recommend a pano head, home made if need be. Given
the lack of major 3d
features on a painting it needn't be perfect.

A home made one is probably only going to work for a fixed focal length
though, which might be an issue with a zoom lens.

In any case (speaking from experience) mosaic shooting brings is own quite
nasty parallax issues.

I experience much of this when doing my maps-in-an-archive shoot, recently.

I would certainly do test shoots with a cheap poster, or something.

 BugBear

On 8 November 2015 at 21:20, Terry Duell  wrote:

> Hello John,
>
> On Mon, 09 Nov 2015 00:06:31 +1100, panostar 
> wrote:
>
> Terry, Your camera with a 300mm lens will be quite a long way from the
>> canvas.  If you have a spherical panorama head, I would use that and
>> stitch as a conventional panorama rather than use mosaic mode.
>>
>>
> I think the camera will be about 6.5m from the painting, but I don't have
> a pano head, hence the current obsession with mosaic mode.
> There will be quite a lot of experimental stuff going on at the time, and
> one is to shoot a conventional pano, but I have been thinking that mosaic
> mode would be my best approach.
> Thanks for your thoughts on this.
>
> Cheers,
> --
> Regards,
> Terry Duell
>
> --
> A list of frequently asked questions is available at:
> http://wiki.panotools.org/Hugin_FAQ
> ---You received this message because you are subscribed to the Google
> Groups "hugin and other free panoramic software" group.
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>
> For more options, visit https://groups.google.com/d/optout.
>

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

[Terry Duell]

Hello Donald,

On Mon, 09 Nov 2015 11:02:07 +1100, dgjohnston   
wrote:




I'm a Donald and I don't play the piano either. As they say "Spell check  
is my new wrost enema!"




Ha ha. The dreaded spill chucker, I should have known.


Cheers,
--
Regards,
Terry Duell

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[hugin-ptx] Stitch smaller than reported by "calculate optimal size"

[Terry Duell]

Hello All,
I'm pretty sure this has come up before, but can't remember and blowed if  
I can find the answer.
I've fiddled about with the position of the pano in preview window,  
selected "auto crop", and in the the stitcher tab I select "Calculate  
optimal size" and hugin reports 5350 x 3490, but the resulting image is  
4275 x 2312.
I'm guessing that the figures hugin reports are related to the preview  
window size and the output reflects the result of the auto crop...or  
something else.

Can someone please enlighten me?

Cheers,
--
Regards,
Terry Duell

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

[Terry Duell]

Hello dg,
Sorry, I forget if you are a David,

On Mon, 09 Nov 2015 09:26:45 +1100, dgjohnston   
wrote:




Terry, at 6.5m and with a relatively flat painting I can't see there  
being anything to produce parallax errors. Or am I showing my naivety  
here? Feel free to let me know if I'm out to lunch on this! ;o)


I think you are quite correct, the parallax should be minimal.
No I don't think you are showing any more naivety than myself on this.
The reason I have become a bit obsessed with mosaic mode for this project  
is the Giclee (should be an accent on the c...can't see how to easily do  
that at the moment ) prints should be an exact, or as near as dammit, copy  
of the original, and that means a true rectangle i.e no perspective  
distortion which is what I will get with a normal pano.
Now I know that it should be possible to correct that in Hugin, and  
normally that works OK but I have had projects where that has proved to be  
a bit of a pain...so all the emphasis on mosaic and how to ensure camera  
square to subject etc.


I'd try  experimenting with just rotating the camera and doing a normal  
piano stitch.


I can't play piano, so will resort to simple pano :-)
Yes, the dance card now includes mosaic mode pano shots, normal pano  
shots, with pixel shift, without pixel shift, automatic white balance,  
manual white balance. It's getting bigger than Ben Hur!


Thanks for your help.

Cheers,
--
Regards,
Terry Duell

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Re: [hugin-ptx] Stitch smaller than reported by "calculate optimal size"

[Terry Duell]

On Mon, 09 Nov 2015 12:08:38 +1100, Terry Duell   
wrote:



Hello All,
I'm pretty sure this has come up before, but can't remember and blowed  
if I can find the answer.
I've fiddled about with the position of the pano in preview window,  
selected "auto crop", and in the the stitcher tab I select "Calculate  
optimal size" and hugin reports 5350 x 3490, but the resulting image is  
4275 x 2312.
I'm guessing that the figures hugin reports are related to the preview  
window size and the output reflects the result of the auto crop...or  
something else.


Greatcoats off!
I finally found the answer..."calculate optimal size" reports the window  
size, the stitched image size is the cropped size.



Cheers,
--
Regards,
Terry Duell

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