YCrCb420ToRGB

Converts a YCrCb image with the 4:2:0 sampling to the RGB image.

Syntax

IppStatus, ippiYCrCb420ToRGB_8u_P3C4R,(const Ipp8u* pSrc[3],int srcStep[3], 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 ippiYCrCb420ToRGB is declared in the ippcc.h file. It operates with ROI (see Regions of Interest in Intel IPP).

This function converts the Y'Cr'Cb' image pSrc with the 4:2:0 sampling (see Table “Planar Image Formats” for more details) to the four-channel gamma-corrected R'G'B' image pDst according to the same formulas as the function ippiYCbCrToRGB does.

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

roiSize.width and roiSize.height should be multiples of 2. If not the function reduces their original values to the nearest multiples of 2, performs the operation, and returns a warning message.

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.
ippStsDoubleSize	Indicates a warning if roiSize has a field that is not a multiple of 2.