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=head1 NAME
pto_var - change image variables inside Hugin .pto project files
=head1 SYNOPSIS
B<pto_var> [options] --opt|--link|--unlink|--set "image variables list input.pto
=head1 DESCRIPTION
B<pto_var> is a command line tool, suitable for inclusion in shell scripts, and allows the change of image variables inside a Hugin .pto project file.
Optimisation variables can be set, altered, linked and unlinked,
The following image variables are allowed:
=over
position: y, p, r, TrX, TrY, TrZ
lens parameters: v, a, b, c, d, e, g, t
photometric parameters: EeV, Er, Eb, Vb, Vc, Vd, Vx, Vy, Ra, Rb, Rc, Rd, Re (Vignetting and response parameter will treated as group.)
=back
The image numbers start with zero.
If the number is missing this applies to the variables of all images (In this case a special treatment applies to the position of the anchor image).
An exclamation mark before the variable will remove the variable from the list of variables to optimised.
=head1 OPTIONS
=over
=item B<-o|--output> = file.pto
Output Hugin PTO file. Default: <filename>_var.pto
=item B<-h|--help>
Shows help
=item B<--opt> varlist
Change optimizer variables
=item B<--modify-opt>
Modify the existing optimizer variables
(without pto_var will start with an
empty variables set)
Examples:
--opt=y,p,r Optimize yaw, pitch and roll of all images
(special treatment for anchor image applies)
--opt=v0,b2 Optimize hfov of image 0 and barrel distortion
of image 2
--opt=v,!v0 Optimize field of view for all images except
for the first image
--modify-opt --opt=!v will not optimize field of view.
--opt=!a,!b,!c Don't optimise distortion (works only with
switch --modify-opt together)
=item B<--link varlist>
Example:
--link=v3 Link hfov of image 3
--link=a1,b1,c1 Link distortions parameter for image 1
=item B<--unlink varlist>
Examples:
--unlink=v5 Unlink hfov for image 5
--unlink=a2,b2,c2 Unlink distortions parameters for image 2
=item B<--set varlist>
Examples:
--set=y0=0,r0=0,p0=0 Resets position of image 0
--set=Vx4=-10,Vy4=10 Sets vignetting offset for image 4
--set=v=20 Sets the field of view to 20 for all images
--set=y=val+20 Increase yaw by 20 deg for all images
--set=v=val*1.1 Increase fov by 10 % for all images
--set=y=i*20 Set yaw to 0, 20, 40, ...
=item B<--set-from-file filename>
Sets variables to new values
It reads the varlist from a file
=back
=head1 AUTHORS
Thomas Modes
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