Computes specific zero crossing measure.
Syntax
IppStatus ippsZeroCrossing_16s32f(const Ipp16s* pSrc, Ipp32u len, Ipp32f* pValZC, IppsZCType zcType);
IppStatus ippsZeroCrossing_32f(const Ipp32f* pSrc, Ipp32u len, Ipp32f* pValZC, IppsZCType zcType);
Parameters
pSrc |
Pointer to the source vector. |
len |
Number of elements in the vector. |
pValZC |
Pointer to the output value of the zero crossing measure. |
zcType |
Type of the zero crossing measure, possible values are ippsZCR, ippsZCXor or ippsZCC. |
Description
The function ippsZeroCrossing is declared in the ipps.h file. This function computes specific zero crossing measure according to the parameter zcType. The result of zero crossing measurement is stored in pValZC. The calculations are performed in accordance with the formulas below.
If zcType = ippZCR, the
function uses the following formula:
If zcType = ippZCXor, the function uses the following formula:
If zcType = ippZCC, the function uses the following formula:
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error when the pSrc or pValZC pointer is NULL. |
ippStsRangeErr |
Indicates an error when zcType has an invalid value. |