RGBToYCbCr

RGB to YCbCr color conversion. More...

Functions
NppStatus	nppiRGBToYCbCr_8u_C3R (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI)
	3 channel 8-bit unsigned packed RGB to 3 channel unsigned 8-bit packed YCbCr color conversion. More...
NppStatus	nppiRGBToYCbCr_8u_AC4R (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI)
	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_P3R (const Npp8u *const pSrc[3], int nSrcStep, Npp8u *pDst[3], int nDstStep, NppiSize oSizeROI)
	3 channel planar 8-bit unsigned RGB to 3 channel planar 8-bit YCbCr color conversion. More...
NppStatus	nppiRGBToYCbCr_8u_C3P3R (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst[3], int nDstStep, NppiSize oSizeROI)
	3 channel 8-bit unsigned packed RGB to 3 channel unsigned 8-bit planar YCbCr color conversion. More...
NppStatus	nppiRGBToYCbCr_8u_AC4P3R (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst[3], int nDstStep, NppiSize oSizeROI)
	4 channel 8-bit unsigned packed RGB with alpha to 3 channel 8-bit unsigned planar YCbCr color conversion. More...

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
	)

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

Parameters

pSrc	Source-Image Pointer.
nSrcStep	Source-Image Line Step.
pDst	Destination-Planar-Image Pointer Array.
nDstStep	Destination-Image Line Step.
oSizeROI	Region-of-Interest (ROI).

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
	)

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

pSrc	Source-Image Pointer.
nSrcStep	Source-Image Line Step.
pDst	Destination-Image Pointer.
nDstStep	Destination-Image Line Step.
oSizeROI	Region-of-Interest (ROI).

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
	)

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

images.

Parameters

pSrc	Source-Image Pointer.
nSrcStep	Source-Image Line Step.
pDst	Destination-Image Pointer.
nDstStep	Destination-Image Line Step.
oSizeROI	Region-of-Interest (ROI).

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
	)

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

Parameters

pSrc	Source-Image Pointer.
nSrcStep	Source-Image Line Step.
pDst	Destination-Image Pointer.
nDstStep	Destination-Image Line Step.
oSizeROI	Region-of-Interest (ROI).

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
	)

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

Parameters

pSrc	Source-Planar-Image Pointer Array.
nSrcStep	Source-Image Line Step.
pDst	Destination-Planar-Image Pointer Array.
nDstStep	Destination-Image Line Step.
oSizeROI	Region-of-Interest (ROI).

Returns

Image Data Related Error Codes, ROI Related Error Codes