Visible to Intel only — GUID: GUID-6B3428B6-253B-4595-8968-4E017A201A12
Visible to Intel only — GUID: GUID-6B3428B6-253B-4595-8968-4E017A201A12
CbYCr422ToBGR_709HDTV
Converts 16-bit per pixel CbYCr image to the BGR image for ITU-R BT.709 HDTV signal.
Syntax
IppStatus ippiCbYCr422ToBGR_709HDTV_8u_C2C3R(const Ipp8u* pSrc, int srcStep, Ipp8u* pDst, int dstStep, IppiSize roiSize);
IppStatus ippiCbYCr422ToBGR_709HDTV_8u_C2C4R(const Ipp8u* pSrc, int srcStep, Ipp8u* pDst, int dstStep, IppiSize roiSize, Ipp8u aval);
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 |
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 the fourth channel. |
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function converts the Cb'Y'Cr' image pSrc, packed in 4:2:2 sampling format, to the three- or four-channel gamma-corrected B'G'R' image pDst for digital component video signals complied with the ITU-R BT.709 Recommendation [ITU709] for high-definition TV (HDTV). A source CbYCr image has the following sequence of bytes: Cb0Y0Cr0Y1, Cb1Y2Cr1Y3, ... . The values of Y' are in the range [16..235], the values of Cb', Cr' are in the range [16..240]. The conversion is performed according to the following formulas [Jack01]:
R' = Y' + 1.540*(Cr' - 128)
G' = Y' - 0.459*(Cr' - 128) - 0.183*(Cb' - 128)
B' = Y' + 1.816*(Cb' - 128)
The destination image pixel values have a nominal range [16..235]. The resulting R'G'B' values should be saturated at the 0 and 255 levels.
The output B'G'R' values are saturated to the range [0..255].
The fourth channel is created by setting channel values to the constant value aval.
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. |