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tca_correct - Man Page

Calculate transverse chromatic aberration


tca_correct [options] inputfile

<inputfile> is the base name of 4 image files:


Colour file to compute TCA parameters


Red channel of <inputfile>


Green channel of <inputfile>


Blue channel of <inputfile>

The channel images must be colour images with 3 identical channels.  If any of -R, -G, or -B is given, this file name is used instead of the derived name.

Output: commandline arguments for fulla


Generates fulla command-line parameters for correction of transverse chromatic aberration (TCA) from sample photos. Ideal sample photos would have a lot of contrast over the entire image area, little saturated colour and no blown highlights.



Display help


input file is PTO file instead of image

-m method

optimization method (0 normal, 1 newfit)

-o optvars

string of variables to optimize ("abcvde")


Reset values (this will zero a,b,c,d,e params and set v to 10) makes sense only with -l option

-s <scale>

Scale for corner detection

-n <number>

number of points per grid cell (default: 10)

-g <number>

divide image in <number>x<number> grid cells (default: 10)

-t num

Remove all control points with an error higher than num pixels (default: 1.5)




Saves the tca data into Hugin lens database

-w filename

write PTO file

-R <r>

Use this file as red channel

-G <g>

Use this file as green channel

-B <b>

Use this file as blue channel


Written by Pablo d'Angelo and others.

Referenced By


2024-06-14 "Version: 2023.0.0" HUGIN