RangeMapping

Performs range map transformation.

Syntax

IppStatus ippiRangeMapping_VC1_8u_C1R( const Ipp8u* pSrc, Ipp32s srcStep, Ipp8u* pDst, Ipp32s dstStep, IppiSize roiSize, Ipp32s rangeMapParam );

Parameters

pSrc	Pointer to the source block. Block coefficient could be within the range of [0, 255].
srcStep	Distance in bytes between starts of the consecutive lines in the source block.
pDst	Pointer to the destination block.
dstStep	Distance in bytes between starts of the consecutive lines in the destination block.
roiSize	Size of the source block.
rangeMapParam	Parameter for the range map; should be within the range of [0, 7].

Description

The function ippiRangeMapping_VC1_8u_C1R is declared in the ippvc.h file. The function performs range map transformation according to 6.2.15.1 of [SMPTE421M].

the function calculates each coefficient of the source block as follows:

Y[n]=CLIP((((Y[n]-128)*(RANGE_MAPY + 9) + 4) >> 3) + 128);

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error condition when pSrc or pDst is NULL.
ippStsOutOfRangeErr	Indicates an error condition if rangeMapParam is out of the range [0, 7].