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FULLA("1") HUGIN FULLA("1")
NAME
fulla - Correct lens distortion, vignetting and chromatic aberration
SYNOPSIS
fulla [options] inputfile(s)
DESCRIPTION
Apply radial or flat-field vignetting correction as well as geometrical ra-
dial distortion and transversal chromatic aberration correction.
fulla can be used to batch correct a large number of files. Radial distor-
tion coefficients can be read from a lens database.
Vignetting correction is done the same way as described in the nona script
file documentation, or from lens database. Vignetting correction can be
done based on a flat-field or a radial scaling.
Vignetting correction by flat-field division:
I = I / c, c = flat-field / mean(flat-field)
Radial vignetting correction:
I = I / c, c = a + b*r^2 + c*r^4 + d*r^6
The radial distortion correction is identical to the one implemented by
PanoTools:
r_new = a*r^4 + b*r^3 + c*r^2 + d*r [1]
Since transversal chromatic aberrations (TCA) leads to differently scaled
objects in the red, green and blue channel, it can be corrected by scaling
the red and blue channel so that they match the green channel. Most appli-
cations, like Photoshop or Picture Window Pro offer TCA correction by lin-
ear scaling. This is equal to varying the d parameter in equation [1].
See http://hugin.sf.net/tutorials/tca for a method to determine these para-
meters.
OPTIONS
--green=db|a:b:c:d
Correct radial distortion coefficient for all channels, (a, b, c, d)
Specify 'db' for database lookup or the 4 coefficients a:b:c:d
--blue=db|a:b:c:d
Correct radial distortion coefficients for blue channel, (a, b, c, d).
This is applied on top of the --green distortion coefficients, use for
TCA corr Specify 'db' for database lookup or the 4 coefficients a:b:c:d
--red=db|a:b:c:d
Correct radial distortion coefficients for red channel, (a, b, c, d).
This is applied on top of the --green distortion coefficients, use for
TCA corr Specify 'db' for database lookup or the 4 coefficients a:b:c:d
--camera-maker=Maker
Camera manufacturer, for database query
--camera-model=Cam
Camera name, for database query
--lensname=Lens
Lens name, for database query
Specify --camera-maker and --camera-model for fixed lens cameras or
--lensname for interchangeable lenses.
--focallength=50
Specify focal length in mm, for database query
--aperature=3.5
Specify aperture for vignetting data database query
--dont-rescale
Do not rescale the image to avoid black borders.
--flatfield=filename
Vignetting correction by flatfield division I = I / c, c = flatfield /
mean(flatfield)
--vignetting=db|a:b:c:d
Correct vignetting (by division) Specify db for database look up or the
the 4 coefficients a:b:c:d I = I / ( a + b*r^2 + c*r^4 + d*r^6)
--linear
Do vignetting correction in linear color space
--gamma=value
Gamma of input data. Used for gamma correction before and after flat-
field correction
threads=n
Number of threads that should be used
-h|--help
Display help
--output=name
Set output filename. If more than one image is given, the name will be
used as suffix. (default suffix: _corr)
--compression=value
Compression of the output files. For jpeg output: 0-100 For tiff out-
put: PACKBITS, DEFLATE, LZW
--offset=X:Y
Horizontal and vertical shift
--verbose
Verbose
AUTHORS
Written by Pablo d'Angelo. Also contains contributions from Douglas
Wilkins, Ippei Ukai, Ed Halley, Bruno Postle, Gerry Patterson, Brent Town-
shend and Thomas Modes.
Version: 2025.0.1" 2014-05-15 FULLA("1")
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | AUTHORS
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