Mean
SSE2
| FwStatus | fwsMean_32f | ( | const Fw32f * pSrc, int len, Fw32f * pMean, FwHintAlgorithm hint ); | |
| FwStatus | fwsMean_32fc | ( | const Fw32fc * pSrc, int len, Fw32fc * pMean, FwHintAlgorithm hint ); | |
| FwStatus | fwsMean_64f | ( | const Fw64f * pSrc, int len, Fw64f * pMean ); | |
| FwStatus | fwsMean_64fc | ( | const Fw64fc * pSrc, int len, Fw64fc * pMean ); | |
| FwStatus | fwsMean_16s_Sfs | ( | const Fw16s * pSrc, int len, Fw16s * pMean, int scaleFactor ); | |
| FwStatus | fwsMean_16sc_Sfs | ( | const Fw16sc * pSrc, int len, Fw16sc * pMean, int scaleFactor ); |
| hint | Hints whether to choose a fast or accurate computation algorithm. | |
| len | Specifies the number of elements in a buffer. | |
| pMean | Pointer to the destination buffer that contains the mean of the values in the source buffer. | |
| pSrc | Pointer to a source buffer. | |
| scaleFactor | Specifies an integer scaling factor for the Sfs operation. The returned result is multiplied by 2^(-scaleFactor). |
These functions step through vector elements in a source buffer, calculate the arithmetic mean, and write the value to a location specified by a pointer.
The following formula is used.
Mean = 1/len ((n = 0) - (len-1)) Sum(pSrc[n])
The 16-bit signed and 16-bit signed complex versions perform an integer scaling operation on the result.