RadiancePmap/wavelet.h
c66aa8e5e235pmapmerge

wavelet.h
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			/*
			=========================================================================
			Lifting scheme implementation of a Daubechies D4 wavelet transform on
			arbitrary sized arrays (i.e. not restricted to powers of 2) of double
			3-tuples. Array boundaries are extended as constants.

			Roland Schregle (roland.schregle@{hslu.ch, gmail.com})
			(c) Lucerne University of Applied Sciences and Arts,
			supported by the Swiss National Science Foundation
			(SNSF #179067, "Light Fields for Spatio-Temporal Glare Assessment")
			=========================================================================

			$Id$
			*/


			#ifndef _PMAP_WAVELET_H
			#define _PMAP_WAVELET_H

			typedef double Coeff;


			void d4WaveletXform (Coeff xIn [][3], unsigned len);
			/* Perform full multiresolution forward Daubechies D4 wavelet transform
			on array xIn of length len containing 3-tuples of type Coeff.
			Note no intra-tuple transform occurs (1-D only).
			Returns wavelet coefficients in xIn, containing average in xIn [0],
			followed by details in order or increasing resolution. */

			void d4WaveletInvXform (Coeff xIn [][3], unsigned len);
			/* Perform full multiresolution inverse Daubechies D4 wavelet transform
			on array xIn of length len containing 3-tuples of type Coeff.
			Note no intra-tuple transform occurs (1-D only).
			Returns reconstructed data in xIn. */
			#endif