| void Impala::Core::Array::VisSemGabor | ( | ArraySet< Array2dScalarReal64 > & | res, | |
| Array2dVec3UInt8 * | rgb, | |||
| double | scale, | |||
| double | freq, | |||
| int | nrOrient | |||
| ) | [inline] |
Definition at line 29 of file VisSemGabor.h.
References Impala::Core::Array::ArraySet< ArrayT >::Array(), Div(), M_PI, Mul(), Norm2(), ProjectRange(), RecGabor(), RecGauss(), Rgb2Ooo(), Set(), and Threshold().
Referenced by Impala::Core::Feature::VisSem::ComputePixelFeatureSet().
00031 { 00032 00033 // hack : hard coded for nrOrient == 4 00034 // this will keep arrays in a specific order if the set is empty: 00035 res.Array("gaborW0"); 00036 res.Array("gaborWl0"); 00037 res.Array("gaborWll0"); 00038 res.Array("gaborW45"); 00039 res.Array("gaborWl45"); 00040 res.Array("gaborWll45"); 00041 res.Array("gaborW90"); 00042 res.Array("gaborWl90"); 00043 res.Array("gaborWll90"); 00044 res.Array("gaborW135"); 00045 res.Array("gaborWl135"); 00046 res.Array("gaborWll135"); 00047 res.Array("Wl"); 00048 res.Array("Wll"); 00049 00050 if (!rgb) 00051 return; // call was to figure out what would be the result 00052 00053 // set the different orientations 00054 double* orients = new double[nrOrient]; 00055 orients[0] = 0; 00056 for (int i=1 ; i<nrOrient; i++) 00057 orients[i] = orients[i-1] + M_PI/nrOrient; 00058 00059 // convert to opponent color space 00060 Array2dVec3Real64* ooo = 0; 00061 Rgb2Ooo(ooo, rgb); 00062 00063 // declare and initialize temporary images 00064 Array2dScalarReal64* E_0_SR64 = 0; 00065 Array2dComplex64* E_0_C64 = 0; 00066 Array2dComplex64* gabor = 0; 00067 Array2dScalarReal64* tmp_SR64 = 0; 00068 Array2dComplex64* tmp_C64 = 0; 00069 00070 // init each color channel 00071 Array2dScalarReal64* imOOO_SR64[3]; 00072 Array2dComplex64* imOOO_C64[3]; 00073 for (int ii=0 ; ii<3 ; ii++) { 00074 imOOO_SR64[ii] = 0; 00075 ProjectRange(imOOO_SR64[ii], ooo, ii+1); 00076 imOOO_C64[ii] = 0; 00077 Set(imOOO_C64[ii], imOOO_SR64[ii]); 00078 } 00079 00080 // creat a smooth intensity image 00081 RecGauss(E_0_SR64, imOOO_SR64[0], scale, scale, 0, 0, 3); 00082 00083 // create a threshold image, since we divide by intensity, threshold on low intensity 00084 int thresholdVal = 15; 00085 Array2dScalarReal64* threshE_0_SR64 = 0; 00086 Threshold(threshE_0_SR64, E_0_SR64, thresholdVal); 00087 //Real64 sum; 00088 //Real64 nr; 00089 //PixStatBasic(threshE_0_SR64, &nr, &sum, (Real64*) 0, (Real64*) 0); 00090 //std::cout << "threshold: nr = " << nr << ", sum = " << sum << std::endl; 00091 00092 // get a list of all gabor responses 00093 //std::vector<CxArray2dScalarReal64*> imList; 00094 int cur = 0; 00095 00096 // first, texture 00097 for (int oi=0; oi<nrOrient; oi++) 00098 { 00099 // with W invariant, use the intensity channel 00100 for (int pixDim=0;pixDim<3 ; pixDim++) 00101 { 00102 //std::cout << "gabor pixdim " << pixDim << ", orient " << oi << std::endl; 00103 Set(tmp_C64, imOOO_SR64[pixDim]); 00104 RecGabor(gabor, tmp_C64, scale, freq, orients[oi]); 00105 00106 // convert complex nr. to real nr, by the magnitude 00107 //Array2dScalarReal64* res = 0; 00108 Norm2(res.Array(cur), gabor); 00109 00110 // with W invariant divide by smooth intensity E_0 after Gabor filtering 00111 Div(res.Array(cur), res.Array(cur), E_0_SR64); 00112 00113 //smooth 00114 //RecGauss(res.Array(cur), res.Array(cur), 1.95*scale, 1.95*scale,0, 0, 3); 00115 00116 // threshold the low intensity values, since we divide by intensity 00117 Mul(res.Array(cur), res.Array(cur), threshE_0_SR64); 00118 00119 // add to result-list 00120 //imList.push_back(res); 00121 cur++; 00122 00123 } // end for pixDim 00124 } // end for(orientation) 00125 00126 // now, add color information. 00127 00128 // dividing by E makes the intensity for the W invariant E/E =1, 00129 // so we can leave E out. 00130 for (int pixDim=1 ; pixDim<3 ; pixDim++) 00131 { 00132 //Array2dScalarReal64* res = 0; 00133 00134 RecGauss(res.Array(cur), imOOO_SR64[pixDim], scale, scale, 0, 0, 3); 00135 00136 // with W invariant divide by smooth intensity E_0 00137 Div(res.Array(cur), res.Array(cur), E_0_SR64); 00138 00139 // threshold the low intensity values, since we divide by intensity 00140 Mul(res.Array(cur), res.Array(cur), threshE_0_SR64); 00141 00142 //imList.push_back(res); 00143 cur++; 00144 } // end for pixDim 00145 00146 // clean up 00147 delete orients; 00148 for (int j=0 ; j<3 ; j++) { 00149 delete imOOO_SR64[j]; 00150 delete imOOO_C64[j]; 00151 } 00152 delete E_0_SR64; 00153 delete E_0_C64; 00154 delete gabor; 00155 delete tmp_SR64; 00156 delete tmp_C64; 00157 delete threshE_0_SR64; 00158 delete ooo; 00159 }
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