Visible to Intel only — GUID: GUID-E719E6D7-6C37-4436-BE72-F4233A266E28
Visible to Intel only — GUID: GUID-E719E6D7-6C37-4436-BE72-F4233A266E28
RGBToYUV422
Converts an RGB image to the YUV color model; uses 4:2:2 sampling.
Syntax
Case 1: Operation on pixel-order data
IppStatus ippiRGBToYUV422_8u_C3C2R(const Ipp8u* pSrc, int srcStep, Ipp8u* pDst, int dstStep, IppiSize roiSize);
Case 2: Operation on planar data with ROI
IppStatus ippiRGBToYUV422_8u_P3R(const Ipp8u* pSrc[3], int srcStep, Ipp8u* pDst[3], int dstStep[3], IppiSize roiSize);
Case 3: Operation on planar data without ROI
IppStatus ippiRGBToYUV422_8u_P3(const Ipp8u* pSrc[3], Ipp8u* pDst[3], IppiSize imgSize);
Case 4: Conversion from pixel-order to planar data with ROI
IppStatus ippiRGBToYUV422_8u_C3P3R(const Ipp8u* pSrc, int srcStep, Ipp8u* pDst[3], int dstStep[3], IppiSize roiSize);
Case 5: Conversion from pixel-order to planar data without ROI
IppStatus ippiRGBToYUV422_8u_C3P3(const Ipp8u* pSrc, Ipp8u* pDst[3], IppiSize imgSize);
Include Files
ippcc.h
Domain Dependencies
Headers: ippcore.h, ippvm.h, ipps.h, ippi.h
Libraries: ippcore.lib, ippvm.lib, ipps.lib, ippi.lib
Parameters
pSrc |
Pointer to the source image buffer for pixel-order image. An array of pointers to the source image buffer in each color plane for planar image. |
srcStep |
Distance in bytes between starts of consecutive lines in the source image for operations with ROI. |
pDst |
Pointer to the destination image buffer for pixel-order image. An array of pointers to the destination image buffer in each color plane for planar image. |
dstStep |
Distance in bytes between starts of consecutive lines in the destination image for operations with ROI. An array of three values for planar image. |
roiSize |
Size of the source and destination ROI in pixels. |
imgSize |
Size of the source and destination images in pixels for operations without ROI. |
Description
This function converts the gamma-corrected R'G'B' image pSrc to the Y'U'V' image pDst with 4:2:2 sampling format, according to the same formulas as the function ippiRGBToYUV does. For more details on this sampling format, see Table “Pixel-Order Image Formats” and Table “Planar Image Formats”.
For digital RGB values in the range [0..255], Y' has the range [0..255], U varies in the range [-112..+112], and V in the range [-157..+157]. To fit in the range of [0..255], the constant value 128 is added to computed U and V values, and V is then saturated.
Some function flavors operates with ROI (see Regions of Interest in Intel IPP). The function flavors that does not use ROI operate on the assumption that both the source and destination images have the same size and occupy a contiguous memory area, which means that image rows are not padded with zeroes. In this case the step parameters are not needed.
Return Values
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 or imgSize has a field with a zero or negative value. |