YCbCr422ToGray
Converts an interlaced 4:2:2 YCbCr or YCrCb image to gray-scale extracting luminance (Y) component.
Syntax
IppStatus ippiYCbCr422ToGray_8u_C2C1R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
, int
dstStep
, IppiSize
roiSize
);
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 ROI.
- srcStep
- Distance, in bytes, between the starting points of consecutive lines in the source image.
- pDst
- Pointer to the destination image ROI.
- dstStep
- Distance, in bytes, between the starting points of consecutive lines in the destination image.
- roiSize
- Size of the source and destination ROI in pixels.
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function converts an interlaced
Y'Cb'Cr'
or Y'Cr'Cb'
image pSrc
with the 4:2:2 sampling (see Table “Pixel-Order Image Formats”
and Table “Planar Image Formats”
for more details) to the gray-scale image pDst
extracting luminance (Y) component.Return Values
- ippStsNoErr
- Indicates no error. Any other value indicates an error or a warning.
- ippStsNullPtrErr
- Indicates an error condition ifpSrcorpDstisNULL.
- ippStsSizeErr
- Indicates an error condition ifroiSizehas a field with a zero or negative value.
Example
The code example below demonstrates how to use the
ippiYCbCr422ToGray_8u_C2C1R
function.const int WIDTH = 2; const int HEIGHT = 2; Ipp8u pSrc[WIDTH * HEIGHT * 2] = { 190,70,191,80, 200,71,201,81, }; Ipp8u pDst[WIDTH * HEIGHT]; int srcStep = WIDTH * 2, dstStep = WIDTH; IppiSize roiSize = {WIDTH, HEIGHT}; IppStatus status = ippiYCbCr422ToGray_8u_C2C1R(pSrc, srcStep, pDst, dstStep, roiSize); if ( status == ippStsNoErr) printf("PASS:\n%3d %3d\n%3d %3d\n", pDst[0], pDst[1], pDst[2], pDst[3]); else printf("FAIL: status = %d\n", status);
Result:
PASS: 190 191 200 201