| int Impala::Core::Feature::Color64::ExtractCorrelogramTextureMoment | ( | BYTE * | pImage, | |
| int | nWidth, | |||
| int | nHeight, | |||
| void * | pFeature, | |||
| int | mode = 0 | |||
| ) | [inline] |
Definition at line 254 of file Color64.h.
References BYTE, ExtractCorrelogram50(), ExtractTextureMoment(), mode, NormalizeVector(), and QuantizeColorHSV44().
Referenced by ComputeGrid(), and Extract().
00255 { 00256 if (pFeature == 0) 00257 { 00258 return -1; 00259 } 00260 memset(pFeature, 0, sizeof(float) * 64); 00261 00262 if (nWidth < 3 || nHeight < 3) 00263 { 00264 return -1; 00265 } 00266 00267 float* pfCorrelogram44 = (float*)pFeature; 00268 float* pfTextureMoment = pfCorrelogram44 + 44; 00269 float* pfColorMoment = pfTextureMoment + 14; 00270 00271 float* pfImage = new float[nWidth * nHeight]; 00272 BYTE* pbImage = new BYTE[nWidth * nHeight]; 00273 00274 if (pbImage != NULL && pfImage != NULL) 00275 { 00276 for (int y = 0; y < nHeight; y ++) 00277 { 00278 float* pf = pfImage + y * nWidth; 00279 BYTE* pb = pbImage + y * nWidth; 00280 00281 for (int x = 0; x < nWidth; x ++) 00282 { 00283 // Note: the order of the buffer is RGBRGB... 00284 BYTE r = pImage[(y*nWidth+x)*3+0]; 00285 BYTE g = pImage[(y*nWidth+x)*3+1]; 00286 BYTE b = pImage[(y*nWidth+x)*3+2]; 00287 00288 pf[x] =(float) r + g + b; 00289 pb[x] = QuantizeColorHSV44(r, g, b); 00290 00291 pfColorMoment[0] += r; 00292 pfColorMoment[1] += g; 00293 pfColorMoment[2] += b; 00294 00295 pfColorMoment[3] += r * r; 00296 pfColorMoment[4] += g * g; 00297 pfColorMoment[5] += b * b; 00298 } 00299 } 00300 00301 float fArea =(float) nWidth * nHeight; 00302 00303 switch (mode) 00304 { 00305 case 1: // 44-d color correlogram 00306 00307 ExtractCorrelogram50(pbImage, nWidth, nHeight, pfCorrelogram44); 00308 break; 00309 00310 case 2: // 14-d color texture moment 00311 00312 ExtractTextureMoment(pfImage, nWidth, nHeight, pfTextureMoment); 00313 break; 00314 00315 case 3: // 6-d RGB color moment 00316 00317 for (int i = 0; i < 3; i ++) 00318 { 00319 pfColorMoment[i] /= fArea; 00320 pfColorMoment[i + 3] = pfColorMoment[i + 3] / fArea - pfColorMoment[i] * pfColorMoment[i]; 00321 pfColorMoment[i + 3] = (float)sqrt(fabs(pfColorMoment[i + 3])); 00322 } 00323 NormalizeVector(pfColorMoment, 6); 00324 break; 00325 00326 default: // color64 = 44+14+6 00327 00328 ExtractCorrelogram50(pbImage, nWidth, nHeight, pfCorrelogram44); 00329 ExtractTextureMoment(pfImage, nWidth, nHeight, pfTextureMoment); 00330 00331 for (int i = 0; i < 3; i ++) 00332 { 00333 pfColorMoment[i] /= fArea; 00334 pfColorMoment[i + 3] = pfColorMoment[i + 3] / fArea - pfColorMoment[i] * pfColorMoment[i]; 00335 pfColorMoment[i + 3] = (float)sqrt(fabs(pfColorMoment[i + 3])); 00336 } 00337 NormalizeVector(pfColorMoment, 6); 00338 00339 break; 00340 } 00341 00342 } 00343 if (pbImage != NULL) 00344 { 00345 delete []pbImage; 00346 } 00347 if (pfImage != NULL) 00348 { 00349 delete []pfImage; 00350 } 00351 00352 return 0; 00353 }
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