Estimates the cross-correlation of two vectors.
Syntax
IppStatus ippsCrossCorr_16s32s_Sfs (const Ipp16s* pSrc1, const Ipp16s* pSrc2, int len, Ipp32s* pDst, int scaleFactor);
IppStatus ippsCrossCorr_NormM_16s (const Ipp16s* pSrc1, const Ipp16s* pSrc2, int len, Ipp16s* pDst);IppStatus ippsCrossCorr_NR_16s (const Ipp16s* pSrc1, const Ipp16s* pSrc2, int len, Ipp16s* pDst, int lenDst);IppStatus ippsCrossCorr_NR_16s_Sfs (const Ipp16s* pSrc1, const Ipp16s* pSrc2, int len, Ipp16s* pDst, int lenDst, int scaleFactor);IppStatus ippsCrossCorr_NR_16s32s (const Ipp16s* pSrc1, const Ipp16s* pSrc2, Ipp32s len, Ipp32s* pDst, Ipp32s lenDst);
Parameters
pSrc1 |
Pointer to the first source vector. |
pSrc2 |
Pointer to the second source vector. |
len |
Number of elements in the source vectors. |
pDst |
Pointer to the destination vector. |
lenDst |
Number of elements in the destination vector. |
scaleFactor |
Scale factor of the destination vector. |
Description
The function ippsCrossCorr is declared in the ippsc.h file. This function estimates the cross-correlation between the vector pSrc1 and the vector pSrc2:
where
Results are stored in the vector pDst. Correlation sums are saturated. Scaling is performed according to the scaleFactor value.
The function with the NormM suffix uses the scale factor that normalizes the absolute maximum of the correlation sums.
The functions with the NR suffix use the nearest right rounding mode.
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error when the pSrc1, pSrc2, or pDst pointer is NULL. |
ippStsScaleRangeErr |
Indicates an error when scaleFactor is negative. |
ippStsSizeErr |
Indicates an error when len is less than or equal to zero. |