src/condat_fast_tv.h
/*
# File : condat_fast_tv.c
#
# Version : proxTV 1.0, Dec. 18, 2012
#
# Author : Laurent Condat, PhD, CNRS research fellow in France.
# Minor modifications by Alvaro Barbero.
#
# Description : This file contains an implementation in the C language
# of algorithms described in the research paper:
#
# L. Condat, "A Direct Algorithm for 1D Total Variation
# Denoising", preprint hal-00675043, Feb. 2012.
#
# This implementation comes with no warranty: due to the
# limited number of tests performed, there may remain
# bugs. In case the functions would not do what they are
# supposed to do, please email the author (contact info
# to be found on the web).
#
# If you use this code or parts of it for any purpose,
# the author asks you to cite the paper above or, in
# that event, its published version. Please email him if
# the proposed algorithms were useful for one of your
# projects, or for any comment or suggestion.
#
# Usage rights : Copyright Laurent Condat.
# This file is distributed under the terms of the CeCILL
# licence (compatible with the GNU GPL), which can be
# found at the URL "http://www.cecill.info".
#
# This software is governed by the CeCILL license under French law and
# abiding by the rules of distribution of free software. You can use,
# modify and or redistribute the software under the terms of the CeCILL
# license as circulated by CEA, CNRS and INRIA at the following URL :
# "http://www.cecill.info".
#
# As a counterpart to the access to the source code and rights to copy,
# modify and redistribute granted by the license, users are provided only
# with a limited warranty and the software's author, the holder of the
# economic rights, and the successive licensors have only limited
# liability.
#
# In this respect, the user's attention is drawn to the risks associated
# with loading, using, modifying and/or developing or reproducing the
# software by the user in light of its specific status of free software,
# that may mean that it is complicated to manipulate, and that also
# therefore means that it is reserved for developers and experienced
# professionals having in-depth computer knowledge. Users are therefore
# encouraged to load and test the software's suitability as regards their
# requirements in conditions enabling the security of their systems and/or
# data to be ensured and, more generally, to use and operate it in the
# same conditions as regards security.
#
# The fact that you are presently reading this means that you have had
# knowledge of the CeCILL license and that you accept its terms.
*/
#ifndef _CONDAT_FAST_TV_H
#define _CONDAT_FAST_TV_H
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
/*
This function implements the 1D total variation denoising
algorithm described in the paper referenced above.
If output=input, the process is performed in place. Else,
the values of input are left unchanged.
lambda must be nonnegative. lambda=0 is admissible and
yields output[k]=input[k] for all k.
If width<=0, nothing is done.
*/
extern "C" {
void TV1D_denoise(double* input, double* output, const int width, const double lambda);
void TV1D_denoise_tautstring(double* input, double* output, int width, const double lambda);
}
#endif