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/*
* $Id: resample.h,v 1.14 2010/02/05 23:50:22 simakov Exp $
*
* EPSILON - wavelet image compression library.
* Copyright (C) 2006,2007,2010 Alexander Simakov, <xander@entropyware.info>
*
* This file is part of EPSILON
*
* EPSILON is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* EPSILON is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with EPSILON. If not, see <http://www.gnu.org/licenses/>.
*
* http://epsilon-project.sourceforge.net
*/
/** \file
*
* \brief Resampling
*
* It is well known that human eye is less sensitive to color
* than intensity. It is worthwhile to utilize this fact. We can
* store chroma channels with lower resolution than luma. One
* can achieve this through channel resampling procedure.
* At the moment EPSILON library uses bilinear resampling
* algorithm.
*
* \section References
*
* <a href="http://en.wikipedia.org/wiki/Bilinear_interpolation">
* Bilinear interpolation (Wikipedia) </a>
*
* <a href="http://alglib.sources.ru/interpolation/bilinearresample.php">
* Bilinear resampling (in Russian)</a> */
#ifndef __RESAMPLE_H__
#define __RESAMPLE_H__
#ifdef __cplusplus
extern "C" {
#endif
/** \addtogroup resampling Resampling */
/*@{*/
#include <common.h>
/** Bilinear channel resampling
*
* This function performes bilinear channel resampling.
*
* \param input_channel Input channel
* \param output_channel Output channel
* \param input_width Input channel width
* \param input_height Input channel height
* \param output_width Output channel width
* \param output_height Output channel height
*
* \return \c VOID
*
* \note Input and output dimensions must be greater than 1. */
void bilinear_resample_channel(coeff_t **input_channel, coeff_t **output_channel,
int input_width, int input_height,
int output_width, int output_height);
/*@}*/
#ifdef __cplusplus
}
#endif
#endif /* __RESAMPLE_H__ */
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