+/*****************************************************************************
+** FILE IDENTIFICATION
+**
+** Name: filter.h
+** Purpose: Signal filter header file
+** Programmer: Kevin Rosenberg
+** Date Started: June 2000
+**
+** This is part of the CTSim program
+** Copyright (C) 1983-2000 Kevin Rosenberg
+**
+** $Id: filter.h,v 1.18 2000/08/03 09:57:33 kevin Exp $
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License (version 2) as
+** published by the Free Software Foundation.
+**
+** This program 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 General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+******************************************************************************/
+
+#ifndef FILTER_H
+#define FILTER_H
+
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#ifdef HAVE_FFTW
+#include <fftw.h>
+#include <rfftw.h>
+#endif
+
+#include <complex>
+
+
class SignalFilter {
public:
- SignalFilter (const FilterType filt_type, double bw, double xmin, double xmax, int n, double param, const DomainType domain, const int numInt);
+ static const int FILTER_INVALID;
+ static const int FILTER_ABS_BANDLIMIT; // filter times |x|
+ static const int FILTER_ABS_SINC;
+ static const int FILTER_ABS_G_HAMMING;
+ static const int FILTER_ABS_COSINE;
+ static const int FILTER_SHEPP;
+ static const int FILTER_BANDLIMIT;
+ static const int FILTER_SINC;
+ static const int FILTER_G_HAMMING;
+ static const int FILTER_COSINE;
+ static const int FILTER_TRIANGLE;
+
+ static const int FILTER_METHOD_INVALID;
+ static const int FILTER_METHOD_CONVOLUTION;
+ static const int FILTER_METHOD_FOURIER;
+ static const int FILTER_METHOD_FOURIER_TABLE;
+ static const int FILTER_METHOD_FFT;
+#if HAVE_FFTW
+ static const int FILTER_METHOD_FFTW;
+ static const int FILTER_METHOD_RFFTW;
+#endif
+
+ static const int DOMAIN_INVALID;
+ static const int DOMAIN_FREQUENCY;
+ static const int DOMAIN_SPATIAL;
+
+ static const int FREQUENCY_FILTER_INVALID;
+ static const int FREQUENCY_FILTER_DIRECT_FREQUENCY;
+ static const int FREQUENCY_FILTER_INVERSE_SPATIAL;
+
+ SignalFilter (const char* filterName, const char* filterMethodName,double bw, double signalIncrement, int n, double param, const char* domainName, const char* frequencyFilterName, const int zeropad = 0, const int preinterpolationFactor = 1);
+
+ SignalFilter (const int filt_type, int filterMethodID, double bw, double signalIncrement, int n, double param, const int domain, int filterFilterID, const int zeropad = 0, const int preinterpolationFactor = 1);
+
+ SignalFilter (const char* filterName, const char* domainName, double bw, double param);
~SignalFilter (void);
double* getFilter (void) const
{ return m_vecFilter; }
- double convolve (const double f[], const double dx, const int n, const int np, const FunctionSymmetry func_type) const;
+ int getNFilterPoints (void) const
+ { return m_nFilterPoints; }
+
+ double convolve (const double f[], const double dx, const int n, const int np) const;
+
+ double convolve (const float f[], const double dx, const int n, const int np) const;
+
+ void filterSignal (const double input[], double output[]) const;
+ void filterSignal (const float input[], double output[]) const;
+
+ static void finiteFourierTransform (const double input[], complex<double> output[], const int n, const int direction);
+ static void finiteFourierTransform (const complex<double> input[], complex<double> output[], const int n, const int direction);
+ static void finiteFourierTransform (const complex<double> input[], double output[], const int n, const int direction);
+
+ void finiteFourierTransform (const double input[], complex<double> output[], const int direction) const;
+ void finiteFourierTransform (const complex<double> input[], complex<double> output[], const int direction) const;
+ void finiteFourierTransform (const complex<double> input[], double output[], const int direction) const;
+
+ void setTraceLevel (int traceLevel) {m_traceLevel = traceLevel; }
- double convolve (const float f[], const double dx, const int n, const int np, const FunctionSymmetry func_type) const;
+ bool fail(void) const {return m_fail;}
+ const string& failMessage(void) const {return m_failMessage;}
- static double spatialResponseCalc (FilterType fType, double bw, double x, double param, int n);
+ const string& nameFilter(void) const { return m_nameFilter;}
+ const string& nameDomain(void) const { return m_nameDomain;}
+ const int idFilter(void) const { return m_idFilter;}
+ const int idDomain(void) const { return m_idDomain;}
+ const int idFrequencyFilter() const { return m_idFrequencyFilter;}
+ const double getFilterMin(void) const {return m_filterMin;}
+ const double getFilterMax(void) const {return m_filterMax;}
+ const double getFilterIncrement(void) const {return m_filterInc;}
- static double spatialResponseAnalytic (FilterType fType, double bw, double x, double param);
+ double response (double x);
- static double frequencyResponse (FilterType fType, double bw, double u, double param);
+ static double spatialResponse (int fType, double bw, double x, double param);
+ static double frequencyResponse (int fType, double bw, double u, double param);
+
+ static double spatialResponseAnalytic (int fType, double bw, double x, double param);
+
+ static double spatialResponseCalc (int fType, double bw, double x, double param, int nIntegral);
+
+ static void setNumIntegral(int nIntegral) {N_INTEGRAL = nIntegral;}
+
+ static const int getFilterCount() {return s_iFilterCount;}
+ static const char** getFilterNameArray() {return s_aszFilterName;}
+ static const char** getFilterTitleArray() {return s_aszFilterTitle;}
+ static int convertFilterNameToID (const char* const filterName);
+ static const char* convertFilterIDToName (const int idFilter);
+ static const char* convertFilterIDToTitle (const int idFilter);
+
+ static const int getFilterMethodCount() {return s_iFilterMethodCount;}
+ static const char** getFilterMethodNameArray() {return s_aszFilterMethodName;}
+ static const char** getFilterMethodTitleArray() {return s_aszFilterMethodTitle;}
+ static int convertFilterMethodNameToID (const char* const filterMethodName);
+ static const char* convertFilterMethodIDToName (const int idFilterMethod);
+ static const char* convertFilterMethodIDToTitle (const int idFilterMethod);
+
+ static const int getDomainCount() {return s_iDomainCount;}
+ static const char** getDomainNameArray() {return s_aszDomainName;}
+ static const char** getDomainTitleArray() {return s_aszDomainTitle;}
+ static int convertDomainNameToID (const char* const domainName);
+ static const char* convertDomainIDToName (const int idDomain);
+ static const char* convertDomainIDToTitle (const int idDomain);
+ static int convertFrequencyFilterNameToID (const char* const ffName);
+ static const char* convertFrequencyFilterIDToName (const int idFF);
+ static const char* convertFrequencyFilterIDToTitle (const int idFF);
+
private:
- double *m_vecFilter;
double m_bw;
- FilterType m_filterType;
-
- double spatialResponseCalc (double x, double param, int n) const;
+ int m_nFilterPoints;
+ int m_nSignalPoints;
+ double m_signalInc;
+ double m_filterMin;
+ double m_filterMax;
+ double m_filterInc;
+ double* m_vecFilter;
+ double* m_vecFourierCosTable;
+ double* m_vecFourierSinTable;
+ complex<double>* m_complexVecFilter;
+#ifdef HAVE_FFTW
+ fftw_real* m_vecRealFftInput, *m_vecRealFftSignal;
+ rfftw_plan m_realPlanForward, m_realPlanBackward;
+ fftw_complex* m_vecComplexFftInput, *m_vecComplexFftSignal;
+ fftw_plan m_complexPlanForward, m_complexPlanBackward;
+#endif
+
+ bool m_fail;
+ string m_failMessage;
+ string m_nameFilter;
+ string m_nameFilterMethod;
+ string m_nameDomain;
+ string m_nameFrequencyFilter;
+ int m_idFilter;
+ int m_idFilterMethod;
+ int m_idFrequencyFilter;
+ int m_idDomain;
+ double m_filterParam;
+ int m_traceLevel;
+ int m_zeropad;
+ int m_nOutputPoints;
+ int m_preinterpolationFactor;
+
+ static const char* s_aszFilterName[];
+ static const char* s_aszFilterTitle[];
+ static const int s_iFilterCount;
+ static const char* s_aszFilterMethodName[];
+ static const char* s_aszFilterMethodTitle[];
+ static const int s_iFilterMethodCount;
+ static const char* s_aszDomainName[];
+ static const char* s_aszDomainTitle[];
+ static const int s_iDomainCount;
+ static const char* s_aszFrequencyFilterName[];
+ static const char* s_aszFrequencyFilterTitle[];
+ static const int s_iFrequencyFilterCount;
+
+ static int N_INTEGRAL;
+
+ static const bool haveAnalyticSpatial (const int filterID);
+
+ void init (const int filt_type, const int filterMethod, double bw, double signalIncrement, int n, double param, const int domain, const int frequencyFilter, const int zeropad, const int preInterpScale);
+
+ double spatialResponseCalc (double x, double param) const;
double spatialResponseAnalytic (double x, double param) const;
};
+#endif
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