YCbCrToBGR_709CSC

Converts a YCbCr image to the BGR image for ITU-R BT.709 CSC signal.

Syntax

IppStatus ippiYCbCrToBGR_709CSC_8u_P3C3R(const Ipp8u* pSrc[3], int srcStep, Ipp8u* pDst, int dstStep, IppiSize roiSize);

IppStatus ippiYCbCrToBGR_709CSC_8u_P3C4R(const Ipp8u* pSrc[3], int srcStep, Ipp8u* pDst, int dstStep, IppiSize roiSize, Ipp8u aval);

Parameters

pSrc	An array of pointers to ROI in separate planes of the source image.
srcStep	An array of distances in bytes between starts of consecutive lines in the source image planes.
pDst	Pointer to the destination image ROI.
dstStep	Distance in bytes between starts of consecutive lines in the destination image.
roiSize	Size of the source and destination ROI in pixels.
aval	Constant value to create fourth channel.

Description

The function ippiYCbCrToBGR_709CSC is declared in the ippcc.h file. It operates with ROI (see Regions of Interest in Intel IPP).

This function converts a planar Y'Cb'Cr' image pSrc to the three- or four-channel gamma-corrected B'G'R' image pDst for digital component video signals complied with the ITU-R BT.709 Recommendation [ITU709] for computer systems consideration (CSC). The conversion is performed according to the following formulas [Jack01]:

R' = 1.164*(Y' - 16) + 1.793*(Cr' - 128)

G' = 1.164*(Y' - 16) - 0.534*(Cr' - 128) - 0.213*(Cb' - 128)

B' = 1.164*(Y' - 16) + 2.115*(Cb' - 128)

The output R'G'B' values are saturated to the range [0..255].

The fourth channel is created by setting channel values to the constant value aval.

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr	Indicates an error condition if pSrc or pDst is NULL.
ippStsSizeErr	Indicates an error condition if roiSize has a field with a zero or negative value.