1 | // ----------------------------------------------------------------------- |
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2 | // growObject.cc: Grow a detected object down to a lower flux threshold. |
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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 <iomanip> |
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30 | #include <vector> |
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31 | #include <duchamp/Cubes/cubes.hh> |
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32 | #include <duchamp/Utils/utils.hh> |
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33 | #include <duchamp/Utils/Statistics.hh> |
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34 | #include <duchamp/PixelMap/Voxel.hh> |
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35 | #include <duchamp/Detection/detection.hh> |
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36 | |
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37 | using std::vector; |
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38 | using std::setw; |
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39 | |
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40 | using namespace PixelInfo; |
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41 | using namespace Statistics; |
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42 | |
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43 | namespace duchamp |
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44 | { |
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45 | |
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46 | void growObject(Detection &object, Cube &cube) |
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47 | { |
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48 | /** |
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49 | * A function to grow an object (given by the Detection) by |
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50 | * including neighbouring voxels out to some lower threshold than |
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51 | * what was previously used in the detection. |
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52 | * |
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53 | * Each pixel has each of its neighbours examined, and if one of |
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54 | * them is not in the object but above the growth threshold, it |
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55 | * is added to the object. |
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56 | * |
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57 | * \param object Object to be grown. |
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58 | * \param cube Necessary to see both the Param list, containing |
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59 | * the growth threshold, and the actual array of pixel fluxes. |
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60 | */ |
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61 | |
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62 | |
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63 | if(cube.pars().getFlagGrowth() && (cube.pars().getGrowthCut()<cube.pars().getCut())) { |
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64 | |
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65 | vector <bool> isInObj(cube.getSize(),false); |
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66 | bool flagAdj = cube.pars().getFlagAdjacent(); |
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67 | int threshS = int(cube.pars().getThreshS()); |
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68 | if(flagAdj) threshS = 1; |
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69 | int threshV = int(cube.pars().getThreshV()); |
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70 | |
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71 | vector<Voxel> voxlist = object.getPixelSet(); |
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72 | int origSize = voxlist.size(); |
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73 | long zero = 0; |
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74 | |
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75 | for(int i=0;i<voxlist.size();i++) { |
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76 | long pos = voxlist[i].getX() + voxlist[i].getY()*cube.getDimX() + |
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77 | voxlist[i].getZ()*cube.getDimX()*cube.getDimY(); |
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78 | isInObj[pos] = true; |
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79 | } |
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80 | |
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81 | StatsContainer<float> growthStats(cube.stats()); |
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82 | |
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83 | growthStats.setThresholdSNR(cube.pars().getGrowthCut()); |
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84 | growthStats.setUseFDR(false); |
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85 | |
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86 | // for(int pix=0; pix<object.getSize(); pix++){ // for each pixel in the object |
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87 | for(int pix=0; pix<voxlist.size(); pix++){ // for each pixel in the object |
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88 | |
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89 | int xmin = std::max(voxlist[pix].getX() - threshS, zero); |
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90 | int xmax = std::min(voxlist[pix].getX() + threshS, cube.getDimX()-1); |
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91 | int ymin = std::max(voxlist[pix].getY() - threshS, zero); |
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92 | int ymax = std::min(voxlist[pix].getY() + threshS, cube.getDimY()-1); |
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93 | int zmin = std::max(voxlist[pix].getZ() - threshV, zero); |
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94 | int zmax = std::min(voxlist[pix].getZ() + threshV, cube.getDimZ()-1); |
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95 | |
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96 | //loop over surrounding pixels. |
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97 | for(int x=xmin; x<=xmax; x++){ |
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98 | for(int y=ymin; y<=ymax; y++){ |
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99 | for(int z=zmin; z<=zmax; z++){ |
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100 | |
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101 | if((x!=voxlist[pix].getX())||(y!=voxlist[pix].getY())||(z!=voxlist[pix].getZ())){ |
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102 | // ignore when the current object pixel |
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103 | |
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104 | long pos = x + y * cube.getDimX() + z * cube.getDimX() * cube.getDimY(); |
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105 | |
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106 | if(!isInObj[pos] && // pixel not already in object? |
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107 | !cube.isBlank(x,y,z) && // pixel not BLANK? |
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108 | !cube.pars().isInMW(z) && // pixel not MW? |
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109 | (flagAdj || hypot(x,y)<threshS) ){ // pixel not too far away? |
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110 | |
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111 | float flux; |
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112 | if(cube.isRecon()) flux = cube.getReconValue(x,y,z); |
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113 | else flux = cube.getPixValue(x,y,z); |
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114 | |
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115 | Voxel pixnew(x,y,z,flux); |
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116 | |
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117 | if( growthStats.isDetection(flux) ){ |
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118 | isInObj[pos] = true; |
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119 | voxlist.push_back(pixnew); |
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120 | } // end of if |
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121 | |
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122 | } // end of if clause regarding position OK |
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123 | |
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124 | } // end of if clause regarding position not same |
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125 | |
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126 | } // end of z loop |
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127 | } // end of y loop |
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128 | } // end of x loop |
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129 | |
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130 | } // end of pix loop |
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131 | |
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132 | |
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133 | // Add in new pixels to the Detection |
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134 | for(int i=origSize; i<voxlist.size(); i++){ |
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135 | object.addPixel(voxlist[i]); |
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136 | } |
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137 | |
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138 | |
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139 | object.calcFluxes(cube.getArray(), cube.getDimArray()); |
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140 | |
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141 | isInObj.clear(); |
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142 | |
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143 | } |
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144 | |
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145 | } |
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146 | } |
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