Developer Reference

  • 2020
  • 07/15/2020
  • Public Content
Contents

BGRToYCbCr420_709CSC

Converts a BGR image to the YCbCr image with 4:2:0 sampling for ITU-R BT.709 CSC signal.

Syntax

IppStatus ippiBGRToYCbCr420_709CSC_8u_C3P3R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
[3], int
dstStep
[3], IppiSize
roiSize
);
IppStatus ippiBGRToYCbCr420_709CSC_8u_C3P2R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDstY
, int
dstYStep
, Ipp8u*
pDstCbCr
, int
dstCbCrStep
, IppiSize
roiSize
);
IppStatus ippiBGRToYCbCr420_709CSC_8u_AC4P3R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
[3], int
dstStep
[3], IppiSize
roiSize
);
IppStatus ippiBGRToYCbCr420_709CSC_8u_AC4P2R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDstY
, int
dstYStep
, Ipp8u*
pDstCbCr
, int
dstCbCrStep
, 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
,
pDstY
,
pDstCbCr
An array of pointers to ROI in separate planes of the destination image.
dstStep
,
dstYStep
,
dstCbCrStep
An 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 three- or four-channel gamma-corrected B'G'R' image
pSrc
to the planar
Y'Cb'Cr'
image
pDst
for digital component video signals complied with the ITU-R BT.709 Recommendation [ITU709] for computer systems consideration (CSC). The source image pixel values are in the range [0..255]. The conversion is performed according to the following formulas [Jack01]:
Y' = 0.183*R' + 0.614*G' + 0.062*B' + 16
Cb' = -0.101*R' - 0.338*G' + 0.439*B' + 128
Cr' = 0.439*R' - 0.399*G' - 0.040*B' + 128
The destination image
pDst
has
4:2:0 sampling
format (see Table
“Planar Image Formats”
for more details).
The values of
roiSize.width
and
roiSize.height
should be multiples of 2. Otherwise, the function reduces their original values to the nearest multiples of 2, performs 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.width
is less than 2 or
roiSize.height
is less than 2.
ippStsDoubleSize
Indicates a warning if
roiSize
has a field that is not a multiple of 2.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804