[hugin-ptx] Question about "--new-lens" option of "pto_lensstack"

[Dr Rainer Woitok]

Greetings,

being primarily interested in stitching flatbed scans  in a Shell script
I eventually installed  Hugin 2015.0.0 for Ubuntu 16.04.   Searching the
internet I soon found

   http://hugin.sourceforge.net/tutorials/scans/en.shtml

pointing to

   http://hugin.sourceforge.net/tutorials/scans/run-scan-pto_var.sh

(which  meanwhile is  outdated  with  respect to  calling  "pto2mk"  and
"make") and then I found

   http://hugin.sourceforge.net/tutorials/hugin-2015.0.0/en.shtml

which led the right way.

Searching further I gathered enough information to get slightly familiar
with what all these commands are doing  and to adapt this example script
to my personal  requirements.   But apart from  various versions  of the
rather dry manpage for "pto_lensstack" I didn't find any valuable infor-
mation regarding this particular command.

Question 1: Am I correct in assuming that when a new lens is assigned to
"i1", that is, the second image, the first and second image have differ-
ent lenses (whatever that means)?

Question 2: What if I stitch three scans or more?  Do I have to specify

   pto_lensstack --new-lens i1,i2,... -o ... ?

Any pointers to the concepts  behind the terms  "lens" and "stack" would
be heartily appreciated.

Sincerely,
  Rainer

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[hugin-ptx] Re: Could not decode image error in 2019.0 beta 1

[Bart van Andel]

On Thursday, 28 February 2019 14:44:52 UTC+1, Abrimaal wrote:
>
> "Add images" already opens Windows explorer, a second Explorer window will 
> only take space on the screen and it will not follow the current work 
> folder.


The "Open file" and "Save file" look much like Windows Explorer (they use 
the same view components) but it's not the same thing. The dialogs are 
basically aimed at opening of saving files (hence their name), and because 
Windows, do indeed offer some of the functionality that the full blown 
Explorer does. This is however not the same in every operating system (for 
Linux it depends on your desktop environment).

Surely an external Explorer window takes up some space, but if you have 
that, you don't need the "Add images" thing either. You can just drag 
images from Explorer onto Hugin.

I'm not sure what you mean by "doesn't follow the current work folder".

I started to write a command line script to get filenames from .pto files, 
> to be interpreted as images, but as I see, it will certainly fail. Command 
> line is tough for multiple file operations and loops (and extremely slow) 
> (and I don't know any other language). 
> The initial goal is only to get filenames from .pto files and load these 
> images to Hugin. All the parameters may be added later.
>

Doesn't the merge functionality that was mentioned by T. Modes in this 
thread do what you want?
 

> Why it is so important to me: I have already photographed almost the whole 
> town in panoramas, from 3 to 20 photos. Then gradually merge one pano with 
> another, to create a street, then a street with another street and so on...
>

Intriguing! Can you share some results? Sound like you are creating 
multi-viewpoint panorama's, (i.e., one long strip showing an entire 
street), no?

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