NVIDIA 2D Image And Signal Performance Primitives (NPP)  Version 11.7.1.*
 All Data Structures Functions Variables Typedefs Enumerations Enumerator Groups Pages
Functions

RGB to YCbCr color conversion. More...

Functions

NppStatus nppiRGBToYCbCr_8u_C3R_Ctx (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppStreamContext nppStreamCtx)
 3 channel 8-bit unsigned packed RGB to 3 channel unsigned 8-bit packed YCbCr color conversion. More...
 
NppStatus nppiRGBToYCbCr_8u_C3R (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI)
 
NppStatus nppiRGBToYCbCr_8u_AC4R_Ctx (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppStreamContext nppStreamCtx)
 4 channel 8-bit unsigned packed RGB with alpha to 4 channel unsigned 8-bit packed YCbCr with alpha color conversion, not affecting alpha. More...
 
NppStatus nppiRGBToYCbCr_8u_AC4R (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI)
 
NppStatus nppiRGBToYCbCr_8u_P3R_Ctx (const Npp8u *const pSrc[3], int nSrcStep, Npp8u *pDst[3], int nDstStep, NppiSize oSizeROI, NppStreamContext nppStreamCtx)
 3 channel planar 8-bit unsigned RGB to 3 channel planar 8-bit YCbCr color conversion. More...
 
NppStatus nppiRGBToYCbCr_8u_P3R (const Npp8u *const pSrc[3], int nSrcStep, Npp8u *pDst[3], int nDstStep, NppiSize oSizeROI)
 
NppStatus nppiRGBToYCbCr_8u_C3P3R_Ctx (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst[3], int nDstStep, NppiSize oSizeROI, NppStreamContext nppStreamCtx)
 3 channel 8-bit unsigned packed RGB to 3 channel unsigned 8-bit planar YCbCr color conversion. More...
 
NppStatus nppiRGBToYCbCr_8u_C3P3R (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst[3], int nDstStep, NppiSize oSizeROI)
 
NppStatus nppiRGBToYCbCr_8u_AC4P3R_Ctx (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst[3], int nDstStep, NppiSize oSizeROI, NppStreamContext nppStreamCtx)
 4 channel 8-bit unsigned packed RGB with alpha to 3 channel 8-bit unsigned planar YCbCr color conversion. More...
 
NppStatus nppiRGBToYCbCr_8u_AC4P3R (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst[3], int nDstStep, NppiSize oSizeROI)
 

Detailed Description

RGB to YCbCr color conversion.

Here is how NPP converts gamma corrected RGB or BGR to YCbCr. In the YCbCr model, Y is defined to have a nominal range [16..235], while Cb and Cr are defined to have a range [16..240], with the value of 128 as corresponding to zero.

* Npp32f nY = 0.257F * R + 0.504F * G + 0.098F * B + 16.0F;
* Npp32f nCb = -0.148F * R - 0.291F * G + 0.439F * B + 128.0F;
* Npp32f nCr = 0.439F * R - 0.368F * G - 0.071F * B + 128.0F;
*

Function Documentation

NppStatus nppiRGBToYCbCr_8u_AC4P3R ( const Npp8u pSrc,
int  nSrcStep,
Npp8u pDst[3],
int  nDstStep,
NppiSize  oSizeROI 
)
NppStatus nppiRGBToYCbCr_8u_AC4P3R_Ctx ( const Npp8u pSrc,
int  nSrcStep,
Npp8u pDst[3],
int  nDstStep,
NppiSize  oSizeROI,
NppStreamContext  nppStreamCtx 
)

4 channel 8-bit unsigned packed RGB with alpha to 3 channel 8-bit unsigned planar YCbCr color conversion.

Parameters
pSrcSource-Image Pointer.
nSrcStepSource-Image Line Step.
pDstDestination-Planar-Image Pointer Array.
nDstStepDestination-Image Line Step.
oSizeROIRegion-of-Interest (ROI).
nppStreamCtxApplication Managed Stream Context.
Returns
Image Data Related Error Codes, ROI Related Error Codes
NppStatus nppiRGBToYCbCr_8u_AC4R ( const Npp8u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI 
)
NppStatus nppiRGBToYCbCr_8u_AC4R_Ctx ( const Npp8u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppStreamContext  nppStreamCtx 
)

4 channel 8-bit unsigned packed RGB with alpha to 4 channel unsigned 8-bit packed YCbCr with alpha color conversion, not affecting alpha.

Parameters
pSrcSource-Image Pointer.
nSrcStepSource-Image Line Step.
pDstDestination-Image Pointer.
nDstStepDestination-Image Line Step.
oSizeROIRegion-of-Interest (ROI).
nppStreamCtxApplication Managed Stream Context.
Returns
Image Data Related Error Codes, ROI Related Error Codes
NppStatus nppiRGBToYCbCr_8u_C3P3R ( const Npp8u pSrc,
int  nSrcStep,
Npp8u pDst[3],
int  nDstStep,
NppiSize  oSizeROI 
)
NppStatus nppiRGBToYCbCr_8u_C3P3R_Ctx ( const Npp8u pSrc,
int  nSrcStep,
Npp8u pDst[3],
int  nDstStep,
NppiSize  oSizeROI,
NppStreamContext  nppStreamCtx 
)

3 channel 8-bit unsigned packed RGB to 3 channel unsigned 8-bit planar YCbCr color conversion.

images.

Parameters
pSrcSource-Image Pointer.
nSrcStepSource-Image Line Step.
pDstDestination-Image Pointer.
nDstStepDestination-Image Line Step.
oSizeROIRegion-of-Interest (ROI).
nppStreamCtxApplication Managed Stream Context.
Returns
Image Data Related Error Codes, ROI Related Error Codes
NppStatus nppiRGBToYCbCr_8u_C3R ( const Npp8u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI 
)
NppStatus nppiRGBToYCbCr_8u_C3R_Ctx ( const Npp8u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppStreamContext  nppStreamCtx 
)

3 channel 8-bit unsigned packed RGB to 3 channel unsigned 8-bit packed YCbCr color conversion.

Parameters
pSrcSource-Image Pointer.
nSrcStepSource-Image Line Step.
pDstDestination-Image Pointer.
nDstStepDestination-Image Line Step.
oSizeROIRegion-of-Interest (ROI).
nppStreamCtxApplication Managed Stream Context.
Returns
Image Data Related Error Codes, ROI Related Error Codes
NppStatus nppiRGBToYCbCr_8u_P3R ( const Npp8u *const  pSrc[3],
int  nSrcStep,
Npp8u pDst[3],
int  nDstStep,
NppiSize  oSizeROI 
)
NppStatus nppiRGBToYCbCr_8u_P3R_Ctx ( const Npp8u *const  pSrc[3],
int  nSrcStep,
Npp8u pDst[3],
int  nDstStep,
NppiSize  oSizeROI,
NppStreamContext  nppStreamCtx 
)

3 channel planar 8-bit unsigned RGB to 3 channel planar 8-bit YCbCr color conversion.

Parameters
pSrcSource-Planar-Image Pointer Array.
nSrcStepSource-Image Line Step.
pDstDestination-Planar-Image Pointer Array.
nDstStepDestination-Image Line Step.
oSizeROIRegion-of-Interest (ROI).
nppStreamCtxApplication Managed Stream Context.
Returns
Image Data Related Error Codes, ROI Related Error Codes

Copyright © 2009-2022 NVIDIA CORPORATION AND AFFILIATES