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.IX Title "TCA_CORRECT ""1"""
.TH TCA_CORRECT """1""" 2024-03-20 """Version: 2023.0.0""" HUGIN
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.SH NAME
tca_correct \- Calculate transverse chromatic aberration
.SH SYNOPSIS
.IX Header "SYNOPSIS"
\&\fBtca_correct\fR [options] \fIinputfile\fR
.PP
<inputfile> is the base name of 4 image files:
.IP <inputfile> 4
.IX Item "<inputfile>"
Colour file to compute TCA parameters
.IP red_<inputfile> 4
.IX Item "red_<inputfile>"
Red channel of <inputfile>
.IP green_<inputfile> 4
.IX Item "green_<inputfile>"
Green channel of <inputfile>
.IP blue_<inputfile> 4
.IX Item "blue_<inputfile>"
Blue channel of <inputfile>
.PP
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.
.PP
Output: commandline arguments for fulla
.SH DESCRIPTION
.IX Header "DESCRIPTION"
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.
.SH OPTIONS
.IX Header "OPTIONS"
.IP \fB\-h\fR 4
.IX Item "-h"
Display help
.IP \fB\-l\fR 4
.IX Item "-l"
input file is PTO file instead of image
.IP "\fB\-m\fR \fImethod\fR" 4
.IX Item "-m method"
optimization method (0 normal, 1 newfit)
.IP "\fB\-o\fR \fIoptvars\fR" 4
.IX Item "-o optvars"
string of variables to optimize ("abcvde")
.IP \fB\-r\fR 4
.IX Item "-r"
Reset values (this will zero a,b,c,d,e params and set v to 10) makes sense only
with \-l option
.IP "\fB\-s\fR \fI<scale\fR>" 4
.IX Item "-s <scale>"
Scale for corner detection
.IP "\fB\-n\fR \fI<number\fR>" 4
.IX Item "-n <number>"
number of points per grid cell (default: 10)
.IP "\fB\-g\fR \fI<number\fR>" 4
.IX Item "-g <number>"
divide image in <number>x<number> grid cells (default: 10)
.IP "\fB\-t\fR \fInum\fR" 4
.IX Item "-t num"
Remove all control points with an error higher than num pixels (default: 1.5)
.IP \fB\-v\fR 4
.IX Item "-v"
Verbose
.IP \fB\-\-save\-into\-database\fR 4
.IX Item "--save-into-database"
Saves the tca data into Hugin lens database
.IP "\fB\-w\fR \fIfilename\fR" 4
.IX Item "-w filename"
write PTO file
.IP "\fB\-R\fR \fI<r\fR>" 4
.IX Item "-R <r>"
Use this file as red channel
.IP "\fB\-G\fR \fI<g\fR>" 4
.IX Item "-G <g>"
Use this file as green channel
.IP "\fB\-B\fR \fI<b\fR>" 4
.IX Item "-B <b>"
Use this file as blue channel
.SH AUTHORS
.IX Header "AUTHORS"
Written by Pablo d'Angelo and others.