YCCToRGB

PhotoYCC to RGB color conversion. More...

Functions
NppStatus	nppiYCCToRGB_8u_C3R_Ctx (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppStreamContext nppStreamCtx)
	3 channel 8-bit unsigned packed YCC to 3 channel 8-bit unsigned packed RGB color conversion. More...
NppStatus	nppiYCCToRGB_8u_C3R (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI)
NppStatus	nppiYCCToRGB_8u_AC4R_Ctx (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppStreamContext nppStreamCtx)
	4 channel 8-bit unsigned packed YCC with alpha to 4 channel 8-bit unsigned packed RGB with alpha color conversion. More...
NppStatus	nppiYCCToRGB_8u_AC4R (const Npp8u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI)

Detailed Description

PhotoYCC to RGB color conversion.

This is how NPP converts PhotoYCC to gamma corrected RGB or BGR.

*  Npp32f nNormalizedY  = ((Npp32f)Y * 0.003921569F) * 1.3584F;  // / 255.0F

*  Npp32f nNormalizedC1 = (((Npp32f)C1 * 0.003921569F) - 156.0F * 0.003921569F) * 2.2179F;
*  Npp32f nNormalizedC2 = (((Npp32f)C2 * 0.003921569F) - 137.0F * 0.003921569F) * 1.8215F;
*  Npp32f nR = nNormalizedY + nNormalizedC2;
*  if (nR > 1.0F)
*      nR = 1.0F;
*  Npp32f nG = nNormalizedY - 0.194F  * nNormalizedC1 - 0.509F * nNormalizedC2;
*  if (nG > 1.0F)
*      nG = 1.0F;
*  Npp32f nB = nNormalizedY + nNormalizedC1;
*  if (nB > 1.0F)
*      nB = 1.0F;
*  R = (Npp8u)(nR * 255.0F);
*  G = (Npp8u)(nG * 255.0F);
*  B = (Npp8u)(nB * 255.0F);
*  

Function Documentation

NppStatus nppiYCCToRGB_8u_AC4R	(	const Npp8u *	pSrc,
		int	nSrcStep,
		Npp8u *	pDst,
		int	nDstStep,
		NppiSize	oSizeROI
	)

NppStatus nppiYCCToRGB_8u_AC4R_Ctx	(	const Npp8u *	pSrc,
		int	nSrcStep,
		Npp8u *	pDst,
		int	nDstStep,
		NppiSize	oSizeROI,
		NppStreamContext	nppStreamCtx
	)

4 channel 8-bit unsigned packed YCC with alpha to 4 channel 8-bit unsigned packed RGB with alpha 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).
nppStreamCtx	Application Managed Stream Context.

Returns

Image Data Related Error Codes, ROI Related Error Codes

NppStatus nppiYCCToRGB_8u_C3R	(	const Npp8u *	pSrc,
		int	nSrcStep,
		Npp8u *	pDst,
		int	nDstStep,
		NppiSize	oSizeROI
	)

NppStatus nppiYCCToRGB_8u_C3R_Ctx	(	const Npp8u *	pSrc,
		int	nSrcStep,
		Npp8u *	pDst,
		int	nDstStep,
		NppiSize	oSizeROI,
		NppStreamContext	nppStreamCtx
	)

3 channel 8-bit unsigned packed YCC to 3 channel 8-bit unsigned packed RGB 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).
nppStreamCtx	Application Managed Stream Context.

Returns

Image Data Related Error Codes, ROI Related Error Codes