RGBToCbYCr422, RGBToCbYCr422Gamma

Convert 24-bit per pixel RGB image to 16-bit per pixel CbYCr image.

Syntax

IppStatus ippiRGBToCbYCr422_8u_C3C2R(const Ipp8u* pSrc, int srcStep, Ipp8u* pDst, int dstStep, IppiSize roiSize);

IppStatus ippiRGBToCbYCr422Gamma_8u_C3C2R(const Ipp8u* pSrc, int srcStep, Ipp8u* pDst, int dstStep, IppiSize roiSize);

Parameters

pSrc	Pointer to the source image ROI.
srcStep	Distance in bytes between starts of consecutive lines in the source image.
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.

Description

The functions ippiRGBToCbYCr422 and ippiRGBToCbYCr422Gamma are declared in the ippcc.h file. They operate with ROI (see Regions of Interest in Intel IPP).

The function ippiRGBToCbYCr422 converts the gamma-corrected R'G'B' image pSrc to the Cb'Y'Cr' image pDst according to the same formulas as the function ippiRGBToYCbCr does.

The function ippiRGBToCbYCr422Gamma performs gamma-correction of the source RGB image pSrc according to the same formula as the function ippiGammaFwd does, and then converts it to the Cb'Y'Cr' image pDst according to the same formulas as the function ippiRGBToYCbCr does.

The functions ippiRGBToCbYCr422 and ippiRGBToCbYCr422Gamma use 4:2:2 sampling format for the converted image.

A CbYCr image has the following sequence of bytes: Cb0Y0Cr0Y1, Cb1Y2Cr1Y3, ....

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.