RGBToYCrCb420
Converts an RGB image to the YCrCb image with 4:2:0 sampling format.
Syntax
IppStatus ippiRGBToYCrCb420_8u_AC4P3R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
[3], int
dstStep
[3], 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 starts of consecutive lines in the source image.
- pDst
- Array of pointers to ROI in separate planes of the destination image.
- dstStep
- Array of distances in bytes between starts of consecutive lines in the destination image planes.
- 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 a four-channel gamma-corrected R'G'B' image
pSrc
to the planar
Y'Cr'Cb'
image
pDst
with the
4:2:0 sampling
(see
Table
“Planar Image Formats”
for more details). The conversion is performed according to the same formulas as the function
ippiRGBToYCbCr
does.
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 ifpSrcorpDstisNULL.
- ippStsSizeErr
- Indicates an error condition ifroiSizehas a field with a zero or negative value.
- ippStsDoubleSize
- Indicates a warning ifroiSizehas a field that is not a multiple of 2.