---
name: "tca_correct"
section: "1"
platform: "linux"
package: "hugin"
version: "2025.0.1-5"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/tca_correct"
---

# tca\_correct(1)

Calculate transverse chromatic aberration

## 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 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.

## 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 (default: 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.