NVIDIA 2D Image And Signal Performance Primitives (NPP)  Version 11.8..*
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Functions
Scale To Lower Bit Depth

Functions for scaling images to lower bit depth. More...

Functions

NppStatus nppiScale_16u8u_C1R_Ctx (const Npp16u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Single channel 16-bit unsigned to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_16u8u_C1R (const Npp16u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_16u8u_C3R_Ctx (const Npp16u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Three channel 16-bit unsigned to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_16u8u_C3R (const Npp16u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_16u8u_C4R_Ctx (const Npp16u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Four channel 16-bit unsigned to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_16u8u_C4R (const Npp16u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_16u8u_AC4R_Ctx (const Npp16u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Four channel 16-bit unsigned to 8-bit unsigned conversion, not affecting Alpha. More...
 
NppStatus nppiScale_16u8u_AC4R (const Npp16u *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_16s8u_C1R_Ctx (const Npp16s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Single channel 16-bit signed to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_16s8u_C1R (const Npp16s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_16s8u_C3R_Ctx (const Npp16s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Three channel 16-bit signed to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_16s8u_C3R (const Npp16s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_16s8u_C4R_Ctx (const Npp16s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Four channel 16-bit signed to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_16s8u_C4R (const Npp16s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_16s8u_AC4R_Ctx (const Npp16s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Four channel 16-bit signed to 8-bit unsigned conversion, not affecting Alpha. More...
 
NppStatus nppiScale_16s8u_AC4R (const Npp16s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_32s8u_C1R_Ctx (const Npp32s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Single channel 32-bit signed to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_32s8u_C1R (const Npp32s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_32s8u_C3R_Ctx (const Npp32s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Three channel 32-bit signed to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_32s8u_C3R (const Npp32s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_32s8u_C4R_Ctx (const Npp32s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Four channel 32-bit signed to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_32s8u_C4R (const Npp32s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_32s8u_AC4R_Ctx (const Npp32s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint, NppStreamContext nppStreamCtx)
 Four channel 32-bit signed to 8-bit unsigned conversion, not affecting Alpha. More...
 
NppStatus nppiScale_32s8u_AC4R (const Npp32s *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, NppHintAlgorithm hint)
 
NppStatus nppiScale_32f8u_C1R_Ctx (const Npp32f *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, Npp32f nMin, Npp32f nMax, NppStreamContext nppStreamCtx)
 Single channel 32-bit floating point to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_32f8u_C1R (const Npp32f *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, Npp32f nMin, Npp32f nMax)
 
NppStatus nppiScale_32f8u_C3R_Ctx (const Npp32f *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, Npp32f nMin, Npp32f nMax, NppStreamContext nppStreamCtx)
 Three channel 32-bit floating point to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_32f8u_C3R (const Npp32f *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, Npp32f nMin, Npp32f nMax)
 
NppStatus nppiScale_32f8u_C4R_Ctx (const Npp32f *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, Npp32f nMin, Npp32f nMax, NppStreamContext nppStreamCtx)
 Four channel 32-bit floating point to 8-bit unsigned conversion. More...
 
NppStatus nppiScale_32f8u_C4R (const Npp32f *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, Npp32f nMin, Npp32f nMax)
 
NppStatus nppiScale_32f8u_AC4R_Ctx (const Npp32f *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, Npp32f nMin, Npp32f nMax, NppStreamContext nppStreamCtx)
 Four channel 32-bit floating point to 8-bit unsigned conversion, not affecting Alpha. More...
 
NppStatus nppiScale_32f8u_AC4R (const Npp32f *pSrc, int nSrcStep, Npp8u *pDst, int nDstStep, NppiSize oSizeROI, Npp32f nMin, Npp32f nMax)
 

Detailed Description

Functions for scaling images to lower bit depth.

To map source pixel srcPixelValue to destination pixel dstPixelValue the following equation is used:

 dstPixelValue = dstMinRangeValue + scaleFactor * (srcPixelValue - srcMinRangeValue)

where scaleFactor = (dstMaxRangeValue - dstMinRangeValue) / (srcMaxRangeValue - srcMinRangeValue).

For conversions between integer data types, the entire integer numeric range of the input data type is mapped onto the entire integer numeric range of the output data type.

For conversions to floating point data types the floating point data range is defined by the user supplied floating point values of nMax and nMin which are used as the dstMaxRangeValue and dstMinRangeValue respectively in the scaleFactor and dstPixelValue calculations and also as the saturation values to which output data is clamped.

When converting from floating-point values to integer values, nMax and nMin are used as the srcMaxRangeValue and srcMinRangeValue respectively in the scaleFactor and dstPixelValue calculations. Output values are saturated and clamped to the full output integer pixel value range.

Common parameters for nppiScale to lower bit depth functions include:

Parameters
pSrcSource-Image Pointer.
nSrcStepSource-Image Line Step.
pDstDestination-Image Pointer.
nDstStepDestination-Image Line Step.
oSizeROIRegion-of-Interest (ROI).
hintalgorithm performance or accuracy selector, currently ignored
nMinspecifies the minimum saturation value to which every output value will be clamped.
nMaxspecifies the maximum saturation value to which every output value will be clamped.
nppStreamCtxApplication Managed Stream Context.
Returns
Image Data Related Error Codes, ROI Related Error Codes, NPP_SCALE_RANGE_ERROR indicates an error condition if nMax <= nMin.

Function Documentation

NppStatus nppiScale_16s8u_AC4R ( const Npp16s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_16s8u_AC4R_Ctx ( const Npp16s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Four channel 16-bit signed to 8-bit unsigned conversion, not affecting Alpha.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_16s8u_C1R ( const Npp16s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_16s8u_C1R_Ctx ( const Npp16s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Single channel 16-bit signed to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_16s8u_C3R ( const Npp16s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_16s8u_C3R_Ctx ( const Npp16s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Three channel 16-bit signed to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_16s8u_C4R ( const Npp16s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_16s8u_C4R_Ctx ( const Npp16s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Four channel 16-bit signed to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_16u8u_AC4R ( const Npp16u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_16u8u_AC4R_Ctx ( const Npp16u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Four channel 16-bit unsigned to 8-bit unsigned conversion, not affecting Alpha.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_16u8u_C1R ( const Npp16u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_16u8u_C1R_Ctx ( const Npp16u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Single channel 16-bit unsigned to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_16u8u_C3R ( const Npp16u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_16u8u_C3R_Ctx ( const Npp16u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Three channel 16-bit unsigned to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_16u8u_C4R ( const Npp16u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_16u8u_C4R_Ctx ( const Npp16u pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Four channel 16-bit unsigned to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_32f8u_AC4R ( const Npp32f pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
Npp32f  nMin,
Npp32f  nMax 
)
NppStatus nppiScale_32f8u_AC4R_Ctx ( const Npp32f pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
Npp32f  nMin,
Npp32f  nMax,
NppStreamContext  nppStreamCtx 
)

Four channel 32-bit floating point to 8-bit unsigned conversion, not affecting Alpha.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_32f8u_C1R ( const Npp32f pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
Npp32f  nMin,
Npp32f  nMax 
)
NppStatus nppiScale_32f8u_C1R_Ctx ( const Npp32f pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
Npp32f  nMin,
Npp32f  nMax,
NppStreamContext  nppStreamCtx 
)

Single channel 32-bit floating point to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_32f8u_C3R ( const Npp32f pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
Npp32f  nMin,
Npp32f  nMax 
)
NppStatus nppiScale_32f8u_C3R_Ctx ( const Npp32f pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
Npp32f  nMin,
Npp32f  nMax,
NppStreamContext  nppStreamCtx 
)

Three channel 32-bit floating point to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_32f8u_C4R ( const Npp32f pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
Npp32f  nMin,
Npp32f  nMax 
)
NppStatus nppiScale_32f8u_C4R_Ctx ( const Npp32f pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
Npp32f  nMin,
Npp32f  nMax,
NppStreamContext  nppStreamCtx 
)

Four channel 32-bit floating point to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_32s8u_AC4R ( const Npp32s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_32s8u_AC4R_Ctx ( const Npp32s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Four channel 32-bit signed to 8-bit unsigned conversion, not affecting Alpha.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_32s8u_C1R ( const Npp32s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_32s8u_C1R_Ctx ( const Npp32s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Single channel 32-bit signed to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_32s8u_C3R ( const Npp32s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_32s8u_C3R_Ctx ( const Npp32s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Three channel 32-bit signed to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.

NppStatus nppiScale_32s8u_C4R ( const Npp32s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint 
)
NppStatus nppiScale_32s8u_C4R_Ctx ( const Npp32s pSrc,
int  nSrcStep,
Npp8u pDst,
int  nDstStep,
NppiSize  oSizeROI,
NppHintAlgorithm  hint,
NppStreamContext  nppStreamCtx 
)

Four channel 32-bit signed to 8-bit unsigned conversion.

For common parameter descriptions, see Common parameters for nppiScale to lower bit depth functions.


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