| void Impala::Core::Feature::Color64::ExtractTextureMoment | ( | float * | pfImage, | |
| int | nWidth, | |||
| int | nHeight, | |||
| float * | pfFeature | |||
| ) | [inline] |
Definition at line 389 of file Color64.h.
References NormalizeVector().
Referenced by ExtractCorrelogramTextureMoment().
00390 { 00391 const float fW2 = (float)sqrt(2.0); 00392 for (int y = 1; y < nHeight - 1; y ++) 00393 { 00394 float* pfCurr = pfImage + y * nWidth; 00395 float* pfPrev = pfCurr - nWidth; 00396 float* pfNext = pfCurr + nWidth; 00397 00398 for (int x = 1; x < nWidth - 1; x ++) 00399 { 00400 float af[8]; 00401 00402 af[0] = pfPrev[x - 1] + pfPrev[x] + pfPrev[x + 1] 00403 + pfCurr[x - 1] + pfCurr[x + 1] 00404 + pfNext[x - 1] + pfNext[x] + pfNext[x + 1]; 00405 00406 af[1] = - pfPrev[x - 1] + pfPrev[x] - pfPrev[x + 1] 00407 + pfCurr[x - 1] + pfCurr[x + 1] 00408 - pfNext[x - 1] + pfNext[x] - pfNext[x + 1]; 00409 00410 af[2] = - pfPrev[x - 1] + pfPrev[x + 1] - pfNext[x - 1] + pfNext[x + 1] 00411 + fW2 * (- pfCurr[x - 1] + pfCurr[x + 1]); 00412 00413 af[3] = - pfPrev[x - 1] - pfPrev[x + 1] + pfNext[x - 1] + pfNext[x + 1] 00414 + fW2 * (- pfPrev[x] + pfNext[x]); 00415 00416 af[4] = fW2 * (- pfPrev[x] + pfCurr[x - 1] + pfCurr[x + 1] - pfNext[x]); 00417 00418 af[5] = fW2 * (pfPrev[x - 1] - pfPrev[x + 1] - pfNext[x - 1] + pfNext[x + 1]); 00419 00420 af[6] = pfPrev[x - 1] - pfPrev[x + 1] + pfNext[x - 1] - pfNext[x + 1] 00421 + fW2 * (- pfCurr[x - 1] + pfCurr[x + 1]); 00422 00423 af[7] = - pfPrev[x - 1] - pfPrev[x + 1] + pfNext[x - 1] + pfNext[x + 1] 00424 + fW2 * (pfPrev[x] - pfNext[x]); 00425 00426 /*float fValueNorm = af[0]; 00427 if (fValueNorm < 1e-4f) 00428 { 00429 fValueNorm = 1e-4f; 00430 } 00431 fValueNorm = 1.0f / fValueNorm; 00432 */ 00433 for (int i = 1; i < 8; i ++) 00434 { 00435 //af[i] *= fValueNorm; 00436 pfFeature[i - 1] += fabs(af[i]); 00437 pfFeature[i + 6] += af[i] * af[i]; 00438 } 00439 } 00440 } 00441 00442 float fSizeNorm = 1.0f / ((nWidth - 2) * (nHeight - 2)); 00443 for (int i = 0; i < 7; i ++) 00444 { 00445 pfFeature[i] *= fSizeNorm; 00446 pfFeature[i + 7] = (float)sqrt(fabs(pfFeature[i + 7] * fSizeNorm - pfFeature[i] * pfFeature[i])); 00447 } 00448 NormalizeVector(pfFeature, 14); 00449 }
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