Class NPPNativeMethods.NPPi.BGRToYUV

BGR to YUV color conversion.

Here is how NPP converts gamma corrected RGB or BGR to YUV.

For digital RGB values in the range [0..255], Y has the range [0..255], U varies in the range [-112..+112], and V in the range [-157..+157].

To fit in the range of [0..255], a constant value of 128 is added to computed U and V values, and V is then saturated.

Npp32f nY = 0.299F * R + 0.587F * G + 0.114F * B;

Npp32f nU = (0.492F * ((Npp32f)nB - nY)) + 128.0F;

Npp32f nV = (0.877F * ((Npp32f)nR - nY)) + 128.0F;

if (nV > 255.0F) nV = 255.0F;

Inheritance

System.Object

NPPNativeMethods.NPPi.BGRToYUV

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: ManagedCuda.NPP

Assembly: NPP.dll

Syntax

public static class BGRToYUV

Methods

nppiBGRToYUV_8u_AC4P4R(CUdeviceptr, Int32, CUdeviceptr[], Int32, NppiSize)

4 channel 8-bit unsigned packed BGR with alpha to 4 channel 8-bit unsigned planar YUV color conversion with alpha. images.

Declaration

public static NppStatus nppiBGRToYUV_8u_AC4P4R(CUdeviceptr pSrc, int nSrcStep, CUdeviceptr[] pDst, int nDstStep, NppiSize oSizeROI)

Parameters

Type	Name	Description
CUdeviceptr	pSrc	Source-Image Pointer.
System.Int32	nSrcStep	Source-Image Line Step.
CUdeviceptr[]	pDst	\ref destination_planar_image_pointer_array.
System.Int32	nDstStep	Destination-Image Line Step.
NppiSize	oSizeROI	Region-of-Interest (ROI).

Returns

Type	Description
NppStatus	StepError, NotEvenStepError, NullPointerError, AlignmentError, StepError, SizeError

nppiBGRToYUV_8u_AC4R(CUdeviceptr, Int32, CUdeviceptr, Int32, NppiSize)

4 channel 8-bit unsigned packed BGR with alpha to 4 channel 8-bit unsigned packed YUV color conversion with alpha, not affecting alpha. images.

Declaration

public static NppStatus nppiBGRToYUV_8u_AC4R(CUdeviceptr pSrc, int nSrcStep, CUdeviceptr pDst, int nDstStep, NppiSize oSizeROI)

Parameters

Type	Name	Description
CUdeviceptr	pSrc	Source-Image Pointer.
System.Int32	nSrcStep	Source-Image Line Step.
CUdeviceptr	pDst	Destination-Image Pointer.
System.Int32	nDstStep	Destination-Image Line Step.
NppiSize	oSizeROI	Region-of-Interest (ROI).

Returns

Type	Description
NppStatus	StepError, NotEvenStepError, NullPointerError, AlignmentError, StepError, SizeError

nppiBGRToYUV_8u_C3P3R(CUdeviceptr, Int32, CUdeviceptr[], Int32, NppiSize)

3 channel 8-bit unsigned packed BGR to 3 channel 8-bit unsigned planar YUV color conversion.

Declaration

public static NppStatus nppiBGRToYUV_8u_C3P3R(CUdeviceptr pSrc, int nSrcStep, CUdeviceptr[] pDst, int nDstStep, NppiSize oSizeROI)

Parameters

Type	Name	Description
CUdeviceptr	pSrc	Source-Image Pointer.
System.Int32	nSrcStep	Source-Image Line Step.
CUdeviceptr[]	pDst	\ref destination_planar_image_pointer_array.
System.Int32	nDstStep	Destination-Image Line Step.
NppiSize	oSizeROI	Region-of-Interest (ROI).

Returns

Type	Description
NppStatus	StepError, NotEvenStepError, NullPointerError, AlignmentError, StepError, SizeError

nppiBGRToYUV_8u_C3R(CUdeviceptr, Int32, CUdeviceptr, Int32, NppiSize)

3 channel 8-bit unsigned packed BGR to 3 channel 8-bit unsigned packed YUV color conversion.

Declaration

public static NppStatus nppiBGRToYUV_8u_C3R(CUdeviceptr pSrc, int nSrcStep, CUdeviceptr pDst, int nDstStep, NppiSize oSizeROI)

Parameters

Type	Name	Description
CUdeviceptr	pSrc	Source-Image Pointer.
System.Int32	nSrcStep	Source-Image Line Step.
CUdeviceptr	pDst	Destination-Image Pointer.
System.Int32	nDstStep	Destination-Image Line Step.
NppiSize	oSizeROI	Region-of-Interest (ROI).

Returns

Type	Description
NppStatus	StepError, NotEvenStepError, NullPointerError, AlignmentError, StepError, SizeError

nppiBGRToYUV_8u_P3R(CUdeviceptr[], Int32, CUdeviceptr[], Int32, NppiSize)

3 channel 8-bit unsigned planar BGR to 3 channel 8-bit unsigned planar YUV color conversion.

Declaration

public static NppStatus nppiBGRToYUV_8u_P3R(CUdeviceptr[] pSrc, int nSrcStep, CUdeviceptr[] pDst, int nDstStep, NppiSize oSizeROI)

Parameters

Type	Name	Description
CUdeviceptr[]	pSrc	\ref source_planar_image_pointer_array.
System.Int32	nSrcStep	Source-Image Line Step.
CUdeviceptr[]	pDst	\ref destination_planar_image_pointer_array.
System.Int32	nDstStep	Destination-Image Line Step.
NppiSize	oSizeROI	Region-of-Interest (ROI).

Returns

Type	Description
NppStatus	StepError, NotEvenStepError, NullPointerError, AlignmentError, StepError, SizeError