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Mailinglist:PanoTools NG
Sender:Antonin Roussel antonin.roussel@...
Date/Time:2020-Apr-21 20:06:18
Subject:Automating depth of field reduction - Aligning a stack of slightly different points of view


PanoTools NG: Automating depth of field reduction - Aligning a stack of slightly different points of view Antonin Roussel antonin.roussel@... 2020-Apr-21 20:06:18
[original post - 19/03/2020 à 10:55]

I "discovered" a way to give a macrophoto look'n'feel to monument 
building pictures, but I feel my process to be time consuming. I wonder :
  - if it is possible to improve Hugin usage in this concern, or
  - if another software would be more accurate, or
  - if Hugin python scripting can help, or
  - ... any comment ?

Process :
I'm taking photos of a monument, about 50-100 from a set of slightly 
different points of view (all spread within a 30cm side square). I want 
to align all those photos on a tiny set of points, from 1 up to 3. These 
points are the same on every pair of photos. These points are expected 
to be on resulting picture focal plane. Once aligned, the set of photos 
is exported as a set of Remapped Images, and then dropped in Siril for 
sum stacking. Gimp can import the three color channels of the resulting and displays the monument in a macrophoto look'n'feel.

Settings :
In order to automate the Control Points Creation as expected, around 
expected focal plane, I use the same Crop Mask on every photos before 
launching creation. Once done, restore default cropping (none)
In order to limit the number of Control Points, I use the following 
customized Control Point Detector Program command `cpfind --linearmatch 
--sieve2width 2 --sieve2height 2 -o %o %s`

Problems are multiple :
  - if points of view are too different (centered differently), Crop 
Masks need to be individually adjusted
  - automated control points are obviously not the same, randomly not 
close enough

Wishes :
  - get a way to generate all control points from the ones manually set 
in the first pair of photos.

Idea :
  - once a pair of photos is aligned, close Hugin. Edit file.pto in a 
text editor to spread first pair of photos Control Points to every 
following pair. Then open this modified file.pto and run "Edit > Fine 
tune all Points". Not yet tested.

NB :
Siril ( can align photos, but as it is made for 
astronomers, it is looking for stars and seems not able to align 
building pictures.

Thank you for your attention.

Posted by: Antonin Roussel <#removed#>

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