YCbCrToRGB

Converts a YCbCr image to the RGB color model.

Syntax

Case 1: Operation on pixel-order data

IppStatus ippiYCbCrToRGB_<mod>(const Ipp8u* pSrc, int srcStep, Ipp8u* pDst, int dstStep, IppiSize roiSize);

Supported values for mod:

8u_C3R

8u_AC4R

Case 2: Operation on planar data

IppStatus ippiYCbCrToRGB_<mod>(const Ipp8u* const pSrc[3], int srcStep, Ipp8u* pDst[3], int dstStep, IppiSize roiSize);

Supported values for mod:

8u_P3R

8u_P3C3R

Case 3: Conversion from planar to pixel-order data

IppStatus ippiYCbCrToRGB_8u_P3C4R(const Ipp8u* pSrc[3], int srcStep, Ipp8u* pDst , int dstStep, IppiSize roiSize, Ipp8u aval);

pSrc	Pointer to the source image ROI for pixel-order image. Array of pointers to the ROI in each separate source color planes for planar images.
srcStep	Distance in bytes between starts of consecutive lines in the source image.
pDst	Pointer to the destination image ROI. Array of pointers to the ROI in the separate destination color planes for planar images.
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 the fourth channel.

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

This function converts the Y'Cb'Cr' image pSrc to the 24-bit gamma-corrected R'G'B' image pDst. The following formulas are used for conversion:

R' = 1.164*(Y' - 16) + 1.596*(Cr' - 128)

G' = 1.164*(Y' - 16) - 0.813*(Cr' - 128) - 0.392*(Cb' - 128)

B' = 1.164*(Y' - 16) + 2.017*(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.

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