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TCA_CORRECT("1")		      HUGIN			TCA_CORRECT("1")

NAME
     tca_correct - Calculate transverse chromatic aberration

SYNOPSIS
     tca_correct [options] inputfile

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

     <inputfile>
	 Colour file to compute TCA parameters

     red_<inputfile>
	 Red channel of <inputfile>

     green_<inputfile>
	 Green channel of <inputfile>

     blue_<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

DESCRIPTION
     Generates fulla command-line parameters for correction of transverse chro-
     matic 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.

OPTIONS
     -h  Display help

     -l  input file is PTO file instead of image

     -m method
	 optimization method (0 normal, 1 newfit)

     -o optvars
	 string of variables to optimize ("abcvde")

     -r  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 (de-
	 fault: 1.5)

     -v  Verbose

     --save-into-database
	 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

AUTHORS
     Written by Pablo d'Angelo and others.

Version: 2025.0.1"		   2014-05-15			TCA_CORRECT("1")

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