Fourier Transforms

The set of Fourier transform functions available in the library. More...

Functions
NppStatus	nppiMagnitude_32fc32f_C1R_Ctx (const Npp32fc *pSrc, int nSrcStep, Npp32f *pDst, int nDstStep, NppiSize oSizeROI, NppStreamContext nppStreamCtx)
	32-bit floating point complex to 32-bit floating point magnitude. More...
NppStatus	nppiMagnitude_32fc32f_C1R (const Npp32fc *pSrc, int nSrcStep, Npp32f *pDst, int nDstStep, NppiSize oSizeROI)
NppStatus	nppiMagnitudeSqr_32fc32f_C1R_Ctx (const Npp32fc *pSrc, int nSrcStep, Npp32f *pDst, int nDstStep, NppiSize oSizeROI, NppStreamContext nppStreamCtx)
	32-bit floating point complex to 32-bit floating point squared magnitude. More...
NppStatus	nppiMagnitudeSqr_32fc32f_C1R (const Npp32fc *pSrc, int nSrcStep, Npp32f *pDst, int nDstStep, NppiSize oSizeROI)

Detailed Description

The set of Fourier transform functions available in the library.

Function Documentation

NppStatus nppiMagnitude_32fc32f_C1R	(	const Npp32fc *	pSrc,
		int	nSrcStep,
		Npp32f *	pDst,
		int	nDstStep,
		NppiSize	oSizeROI
	)

NppStatus nppiMagnitude_32fc32f_C1R_Ctx	(	const Npp32fc *	pSrc,
		int	nSrcStep,
		Npp32f *	pDst,
		int	nDstStep,
		NppiSize	oSizeROI,
		NppStreamContext	nppStreamCtx
	)

32-bit floating point complex to 32-bit floating point magnitude.

Converts complex-number pixel image to single channel image computing the result pixels as the magnitude of the complex values.

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 nppiMagnitudeSqr_32fc32f_C1R	(	const Npp32fc *	pSrc,
		int	nSrcStep,
		Npp32f *	pDst,
		int	nDstStep,
		NppiSize	oSizeROI
	)

NppStatus nppiMagnitudeSqr_32fc32f_C1R_Ctx	(	const Npp32fc *	pSrc,
		int	nSrcStep,
		Npp32f *	pDst,
		int	nDstStep,
		NppiSize	oSizeROI,
		NppStreamContext	nppStreamCtx
	)

32-bit floating point complex to 32-bit floating point squared magnitude.

Converts complex-number pixel image to single channel image computing the result pixels as the squared magnitude of the complex values.

The squared magnitude is an itermediate result of magnitude computation and can thus be computed faster than actual magnitude. If magnitudes are required for sorting/comparing only, using this function instead of nppiMagnitude_32fc32f_C1R can be a worthwhile performance optimization.

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