1 | // ----------------------------------------------------------------------- |
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2 | // filter.cc: Defining a filter function for wavelet reconstruction. |
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3 | // ----------------------------------------------------------------------- |
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4 | // Copyright (C) 2006, Matthew Whiting, ATNF |
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5 | // |
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6 | // This program is free software; you can redistribute it and/or modify it |
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7 | // under the terms of the GNU General Public License as published by the |
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8 | // Free Software Foundation; either version 2 of the License, or (at your |
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9 | // option) any later version. |
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10 | // |
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11 | // Duchamp is distributed in the hope that it will be useful, but WITHOUT |
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12 | // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 | // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 | // for more details. |
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15 | // |
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16 | // You should have received a copy of the GNU General Public License |
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17 | // along with Duchamp; if not, write to the Free Software Foundation, |
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18 | // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA |
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19 | // |
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20 | // Correspondence concerning Duchamp may be directed to: |
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21 | // Internet email: Matthew.Whiting [at] atnf.csiro.au |
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22 | // Postal address: Dr. Matthew Whiting |
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23 | // Australia Telescope National Facility, CSIRO |
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24 | // PO Box 76 |
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25 | // Epping NSW 1710 |
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26 | // AUSTRALIA |
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27 | // ----------------------------------------------------------------------- |
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28 | #include <iostream> |
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29 | #include <sstream> |
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30 | #include <duchamp/duchamp.hh> |
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31 | #include <duchamp/ATrous/filter.hh> |
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32 | #include <math.h> |
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33 | #include <vector> |
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34 | |
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35 | namespace duchamp |
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36 | { |
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37 | |
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38 | Filter::Filter() |
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39 | { |
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40 | this->sigmaFactors.resize(3); |
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41 | for(int i=0;i<3;i++) this->sigmaFactors[i] = new std::vector<double>(20); |
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42 | this->loadSpline(); |
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43 | } |
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44 | |
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45 | Filter::Filter(const Filter& f) |
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46 | { |
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47 | operator=(f); |
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48 | } |
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49 | |
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50 | Filter& Filter::operator=(const Filter& f) |
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51 | { |
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52 | if(this==&f) return *this; |
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53 | this->name = f.name; |
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54 | this->filter1D = f.filter1D; |
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55 | this->maxNumScales = f.maxNumScales; |
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56 | this->sigmaFactors = f.sigmaFactors; |
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57 | return *this; |
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58 | } |
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59 | |
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60 | //----------------------------------------------------------------------- |
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61 | |
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62 | Filter::~Filter() |
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63 | { |
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64 | this->filter1D.clear(); |
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65 | this->maxNumScales.clear(); |
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66 | //for(int i=0;i<3;i++) delete this->sigmaFactors[i]; |
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67 | //for(int i=0;i<3;i++) this->sigmaFactors[i]->clear(); |
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68 | // for(int i=0;i<3;i++){ |
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69 | // std::vector<double>* p = this->sigmaFactors[i]; |
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70 | // delete p; |
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71 | // } |
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72 | this->sigmaFactors.clear(); |
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73 | } |
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74 | //----------------------------------------------------------------------- |
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75 | |
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76 | void Filter::define(int filtercode) |
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77 | { |
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78 | switch(filtercode) |
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79 | { |
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80 | case 2: |
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81 | this->loadTriangle(); |
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82 | break; |
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83 | case 3: |
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84 | this->loadHaar(); |
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85 | break; |
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86 | case 4: |
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87 | // this->loadTopHat(); |
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88 | case 1: |
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89 | default: |
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90 | if(filtercode!=1){ |
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91 | // if(filtercode==4) { |
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92 | // std::stringstream errmsg; |
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93 | // errmsg << "TopHat Wavelet not being used currently." |
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94 | // << "Using B3 spline instead.\n"; |
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95 | // duchampWarning("Filter::define", errmsg.str()); |
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96 | // } |
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97 | // else { |
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98 | std::stringstream errmsg; |
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99 | errmsg << "Filter code " << filtercode << " undefined. Using B3 spline.\n"; |
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100 | duchampWarning("Wavelet Filter", errmsg.str()); |
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101 | // } |
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102 | } |
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103 | this->loadSpline(); |
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104 | break; |
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105 | } |
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106 | |
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107 | } |
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108 | //----------------------------------------------------------------------- |
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109 | |
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110 | int Filter::getNumScales(long length) |
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111 | { |
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112 | switch(this->filter1D.size()){ |
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113 | case 5: |
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114 | return int(log(double(length-1))/M_LN2) - 1; |
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115 | break; |
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116 | case 3: |
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117 | return int(log(double(length-1))/M_LN2); |
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118 | break; |
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119 | default: |
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120 | return 1 + int(log(double(length-1)/double(this->filter1D.size()-1))/M_LN2); |
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121 | break; |
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122 | } |
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123 | } |
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124 | //----------------------------------------------------------------------- |
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125 | |
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126 | int Filter::getMaxSize(int scale) |
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127 | { |
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128 | switch(this->filter1D.size()){ |
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129 | case 5: |
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130 | return int(pow(2,scale+1)) + 1; |
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131 | break; |
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132 | case 3: |
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133 | return int(pow(2,scale)) + 1; |
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134 | break; |
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135 | default: |
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136 | return int(pow(2,scale-1))*(this->filter1D.size()-1) + 1; |
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137 | break; |
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138 | } |
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139 | } |
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140 | //----------------------------------------------------------------------- |
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141 | |
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142 | void Filter::loadSpline() |
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143 | { |
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144 | double filter[5] = {0.0625, 0.25, 0.375, 0.25, 0.0625}; |
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145 | this->name = "B3 spline function"; |
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146 | this->filter1D.resize(5); |
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147 | for(int i=0;i<5;i++) this->filter1D[i] = filter[i]; |
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148 | this->sigmaFactors.resize(3); |
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149 | this->maxNumScales.resize(3); |
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150 | |
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151 | this->maxNumScales[0] = 18; |
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152 | double sigmaFactors1D[19] = {1.00000000000,7.23489806e-1,2.85450405e-1,1.77947535e-1, |
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153 | 1.22223156e-1,8.58113122e-2,6.05703043e-2,4.28107206e-2, |
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154 | 3.02684024e-2,2.14024008e-2,1.51336781e-2,1.07011079e-2, |
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155 | 7.56682272e-3,5.35055108e-3,3.78341085e-3,2.67527545e-3, |
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156 | 1.89170541e-3,1.33763772e-3,9.45852704e-4}; |
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157 | this->sigmaFactors[0]->resize(19); |
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158 | for(int i=0;i<19;i++)(*this->sigmaFactors[0])[i] = sigmaFactors1D[i]; |
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159 | |
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160 | this->maxNumScales[1] = 11; |
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161 | double sigmaFactors2D[12] = {1.00000000000,8.90796310e-1,2.00663851e-1,8.55075048e-2, |
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162 | 4.12474444e-2,2.04249666e-2,1.01897592e-2,5.09204670e-3, |
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163 | 2.54566946e-3,1.27279050e-3,6.36389722e-4,3.18194170e-4}; |
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164 | this->sigmaFactors[1]->resize(12); |
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165 | for(int i=0;i<12;i++)(*this->sigmaFactors[1])[i] = sigmaFactors2D[i]; |
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166 | |
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167 | this->maxNumScales[2] = 7; |
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168 | double sigmaFactors3D[8] = {1.00000000000,9.56543592e-1,1.20336499e-1,3.49500154e-2, |
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169 | 1.18164242e-2,4.13233507e-3,1.45703714e-3,5.14791120e-4}; |
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170 | this->sigmaFactors[2]->resize(8); |
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171 | for(int i=0;i<12;i++)(*this->sigmaFactors[2])[i] = sigmaFactors3D[i]; |
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172 | } |
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173 | //----------------------------------------------------------------------- |
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174 | |
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175 | void Filter::loadTriangle() |
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176 | { |
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177 | double filter[3] = {1./4., 1./2., 1./4.}; |
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178 | this->filter1D.resize(3); |
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179 | for(int i=0;i<3;i++) this->filter1D[i] = filter[i]; |
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180 | this->name = "Triangle function"; |
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181 | this->sigmaFactors.resize(3); |
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182 | this->maxNumScales.resize(3); |
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183 | |
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184 | this->maxNumScales[0] = 18; |
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185 | double sigmaFactors1D[19] = {1.00000000000,6.12372436e-1,3.30718914e-1,2.11947812e-1, |
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186 | 1.45740298e-1,1.02310944e-1,7.22128185e-2,5.10388224e-2, |
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187 | 3.60857673e-2,2.55157615e-2,1.80422389e-2,1.27577667e-2, |
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188 | 9.02109930e-3,6.37887978e-3,4.51054902e-3,3.18942978e-3, |
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189 | 2.25527449e-3,1.59471988e-3,1.12763724e-4}; |
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190 | this->sigmaFactors[0]->resize(19); |
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191 | for(int i=0;i<19;i++)(*this->sigmaFactors[0])[i] = sigmaFactors1D[i]; |
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192 | |
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193 | this->maxNumScales[1] = 12; |
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194 | double sigmaFactors2D[13] = {1.00000000000,8.00390530e-1,2.72878894e-1,1.19779282e-1, |
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195 | 5.77664785e-2,2.86163283e-2,1.42747506e-2,7.13319703e-3, |
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196 | 3.56607618e-3,1.78297280e-3,8.91478237e-4,4.45738098e-4, |
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197 | 2.22868922e-4}; |
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198 | this->sigmaFactors[1]->resize(13); |
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199 | for(int i=0;i<12;i++)(*this->sigmaFactors[1])[i] = sigmaFactors2D[i]; |
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200 | |
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201 | this->maxNumScales[2] = 8; |
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202 | double sigmaFactors3D[9] = {1.00000000000,8.959544490e-1,1.92033014e-1,5.76484078e-2, |
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203 | 1.94912393e-2,6.812783870e-3,2.40175885e-3,8.48538128e-4, |
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204 | 2.99949455e-4}; |
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205 | this->sigmaFactors[2]->resize(9); |
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206 | for(int i=0;i<12;i++)(*this->sigmaFactors[2])[i] = sigmaFactors3D[i]; |
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207 | } |
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208 | //----------------------------------------------------------------------- |
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209 | |
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210 | void Filter::loadHaar() |
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211 | { |
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212 | double filter[3] = {0., 1./2., 1./2.}; |
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213 | this->name = "Haar wavelet"; |
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214 | this->filter1D.resize(3); |
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215 | for(int i=0;i<3;i++) this->filter1D[i] = filter[i]; |
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216 | this->sigmaFactors.resize(3); |
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217 | this->maxNumScales.resize(3); |
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218 | |
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219 | this->maxNumScales[0] = 6; |
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220 | double sigmaFactors1D[7] = {1.00000000000,7.07167810e-1,5.00000000e-1,3.53553391e-1, |
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221 | 2.50000000e-1,1.76776695e-1,1.25000000e-1}; |
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222 | this->sigmaFactors[0]->resize(7); |
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223 | for(int i=0;i<19;i++)(*this->sigmaFactors[0])[i] = sigmaFactors1D[i]; |
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224 | |
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225 | this->maxNumScales[1] = 6; |
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226 | double sigmaFactors2D[7] = {1.00000000000,4.33012702e-1,2.16506351e-1,1.08253175e-1, |
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227 | 5.41265877e-2,2.70632939e-2,1.35316469e-2}; |
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228 | this->sigmaFactors[1]->resize(7); |
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229 | for(int i=0;i<12;i++)(*this->sigmaFactors[1])[i] = sigmaFactors2D[i]; |
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230 | |
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231 | this->maxNumScales[2] = 8; |
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232 | double sigmaFactors3D[9] = {1.00000000000,9.35414347e-1,3.30718914e-1,1.16926793e-1, |
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233 | 4.13398642e-2,1.46158492e-2,5.16748303e-3,1.82698115e-3, |
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234 | 6.45935379e-4}; |
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235 | this->sigmaFactors[2]->resize(9); |
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236 | for(int i=0;i<12;i++)(*this->sigmaFactors[2])[i] = sigmaFactors3D[i]; |
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237 | } |
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238 | |
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239 | } |
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