Primitives for computing the image quality index of two images. More...

QualityIndex

Given two images $M$ and $N$ (both $W \times H$ ), the mathematical formula to calculate the image quality index $Q$ between them is expressed as:

$Q = \frac{4\sigma_{MN}\tilde{M}\tilde{N}}{[(\tilde{M}^2)+(\tilde{N}^2)][(\sigma_M)^2+(\sigma_N)^2]}$

where

$\tilde{M} = \frac{1}{W\cdot H}\sum_{j=0}^{H-1}\sum_{i=0}^{W-1}M(j,i)$

$\tilde{N} = \frac{1}{W\cdot H}\sum_{j=0}^{H-1}\sum_{i=0}^{W-1}N(j,i)$

$\sigma_{M} = \sqrt{\frac{1}{W\cdot H-1}\sum_{j=0}^{H-1}\sum_{i=0}^{W-1}[M(j,i)-\tilde{M}]^2}$

$\sigma_{N} = \sqrt{\frac{1}{W\cdot H-1}\sum_{j=0}^{H-1}\sum_{i=0}^{W-1}[N(j,i)-\tilde{N}]^2}$

$\sigma_{MN} = \frac{1}{W\cdot H-1}\sum_{j=0}^{H-1}\sum_{i=0}^{W-1}[M(j,i)-\tilde{M}][N(j,i)-\tilde{N}]$

The functions require additional scratch buffer for computations.

Common parameters for nppiQualityIndex functions include:

Parameters

pSrc1	Source-Image Pointer.
nSrc1Step	Source-Image Line Step.
pSrc2	Source-Image Pointer.
nSrc2Step	Source-Image Line Step.
oRoiSize	Region-of-Interest (ROI).
pDst	Pointer to the quality index.
pDeviceBuffer	Pointer to the required device memory allocation, Scratch Buffer and Host Pointer.

Returns: Image Data Related Error Codes, ROI Related Error Codes, or NPP_QUALITY_INDEX_ERROR if pixels of either image are constant numberse.

NppStatus nppiQualityIndex_8u32f_C1R (const Npp8u *pSrc1, int nSrc1Step, const Npp8u *pSrc2, int nSrc2Step, NppiSize oRoiSize, Npp32f *pDst, Npp8u *pDeviceBuffer)

One-channel 8-bit unsigned image QualityIndex. More...

NppStatus nppiQualityIndex_16u32f_C1R (const Npp16u *pSrc1, int nSrc1Step, const Npp16u *pSrc2, int nSrc2Step, NppiSize oRoiSize, Npp32f *pDst, Npp8u *pDeviceBuffer)

One-channel 16-bit unsigned image QualityIndex. More...

NppStatus nppiQualityIndex_32f_C1R (const Npp32f *pSrc1, int nSrc1Step, const Npp32f *pSrc2, int nSrc2Step, NppiSize oRoiSize, Npp32f *pDst, Npp8u *pDeviceBuffer)

One-channel 32-bit floating point image QualityIndex. More...

NppStatus nppiQualityIndex_8u32f_C3R (const Npp8u *pSrc1, int nSrc1Step, const Npp8u *pSrc2, int nSrc2Step, NppiSize oRoiSize, Npp32f *pDst, Npp8u *pDeviceBuffer)

Three-channel 8-bit unsigned image QualityIndex. More...

NppStatus nppiQualityIndex_16u32f_C3R (const Npp16u *pSrc1, int nSrc1Step, const Npp16u *pSrc2, int nSrc2Step, NppiSize oRoiSize, Npp32f *pDst, Npp8u *pDeviceBuffer)

Three-channel 16-bit unsigned image QualityIndex. More...

NppStatus nppiQualityIndex_32f_C3R (const Npp32f *pSrc1, int nSrc1Step, const Npp32f *pSrc2, int nSrc2Step, NppiSize oRoiSize, Npp32f *pDst, Npp8u *pDeviceBuffer)

Three-channel 32-bit floating point image QualityIndex. More...

NppStatus nppiQualityIndex_8u32f_AC4R (const Npp8u *pSrc1, int nSrc1Step, const Npp8u *pSrc2, int nSrc2Step, NppiSize oRoiSize, Npp32f *pDst, Npp8u *pDeviceBuffer)

Four-channel 8-bit unsigned image QualityIndex. More...

NppStatus nppiQualityIndex_16u32f_AC4R (const Npp16u *pSrc1, int nSrc1Step, const Npp16u *pSrc2, int nSrc2Step, NppiSize oRoiSize, Npp32f *pDst, Npp8u *pDeviceBuffer)

Four-channel 16-bit unsigned image QualityIndex. More...

NppStatus nppiQualityIndex_32f_AC4R (const Npp32f *pSrc1, int nSrc1Step, const Npp32f *pSrc2, int nSrc2Step, NppiSize oRoiSize, Npp32f *pDst, Npp8u *pDeviceBuffer)

Four-channel 32-bit floating point image QualityIndex. More...

QualityIndexGetBufferHostSize
Companion primitives for computing the device buffer size (in bytes) required by the QualityIndex primitives.
NppStatus	nppiQualityIndexGetBufferHostSize_8u32f_C1R (NppiSize oSizeROI, int *hpBufferSize)
	Buffer size (in bytes) for nppiQualityIndex_8u32f_C1R. More...

NppStatus	nppiQualityIndexGetBufferHostSize_16u32f_C1R (NppiSize oSizeROI, int *hpBufferSize)
	Buffer size (in bytes) for nppiQualityIndex_16u32f_C1R. More...

NppStatus	nppiQualityIndexGetBufferHostSize_32f_C1R (NppiSize oSizeROI, int *hpBufferSize)
	Buffer size (in bytes) for nppiQualityIndex_32f_C1R. More...

NppStatus	nppiQualityIndexGetBufferHostSize_8u32f_C3R (NppiSize oSizeROI, int *hpBufferSize)
	Buffer size (in bytes) for nppiQualityIndex_8u32f_C3R. More...

NppStatus	nppiQualityIndexGetBufferHostSize_16u32f_C3R (NppiSize oSizeROI, int *hpBufferSize)
	Buffer size (in bytes) for nppiQualityIndex_16u32f_C3R. More...

NppStatus	nppiQualityIndexGetBufferHostSize_32f_C3R (NppiSize oSizeROI, int *hpBufferSize)
	Buffer size (in bytes) for nppiQualityIndex_32f_C3R. More...

NppStatus	nppiQualityIndexGetBufferHostSize_8u32f_AC4R (NppiSize oSizeROI, int *hpBufferSize)
	Buffer size (in bytes) for nppiQualityIndex_8u32f_AC4R. More...

NppStatus	nppiQualityIndexGetBufferHostSize_16u32f_AC4R (NppiSize oSizeROI, int *hpBufferSize)
	Buffer size (in bytes) for nppiQualityIndex_16u32f_AC4R. More...

NppStatus	nppiQualityIndexGetBufferHostSize_32f_AC4R (NppiSize oSizeROI, int *hpBufferSize)
	Buffer size (in bytes) for nppiQualityIndex_32f_AC4R. More...

Detailed Description

Primitives for computing the image quality index of two images.

Function Documentation

NppStatus nppiQualityIndex_16u32f_AC4R	(	const Npp16u *	pSrc1,
		int	nSrc1Step,
		const Npp16u *	pSrc2,
		int	nSrc2Step,
		NppiSize	oRoiSize,
		Npp32f *	pDst,
		Npp8u *	pDeviceBuffer
	)

Four-channel 16-bit unsigned image QualityIndex.

For common parameter descriptions, see Common parameters for nppiQualityIndex functions.

NppStatus nppiQualityIndex_16u32f_C1R	(	const Npp16u *	pSrc1,
		int	nSrc1Step,
		const Npp16u *	pSrc2,
		int	nSrc2Step,
		NppiSize	oRoiSize,
		Npp32f *	pDst,
		Npp8u *	pDeviceBuffer
	)

One-channel 16-bit unsigned image QualityIndex.

For common parameter descriptions, see Common parameters for nppiQualityIndex functions.

NppStatus nppiQualityIndex_16u32f_C3R	(	const Npp16u *	pSrc1,
		int	nSrc1Step,
		const Npp16u *	pSrc2,
		int	nSrc2Step,
		NppiSize	oRoiSize,
		Npp32f *	pDst,
		Npp8u *	pDeviceBuffer
	)

Three-channel 16-bit unsigned image QualityIndex.

For common parameter descriptions, see Common parameters for nppiQualityIndex functions.

NppStatus nppiQualityIndex_32f_AC4R	(	const Npp32f *	pSrc1,
		int	nSrc1Step,
		const Npp32f *	pSrc2,
		int	nSrc2Step,
		NppiSize	oRoiSize,
		Npp32f *	pDst,
		Npp8u *	pDeviceBuffer
	)

Four-channel 32-bit floating point image QualityIndex.

For common parameter descriptions, see Common parameters for nppiQualityIndex functions.

NppStatus nppiQualityIndex_32f_C1R	(	const Npp32f *	pSrc1,
		int	nSrc1Step,
		const Npp32f *	pSrc2,
		int	nSrc2Step,
		NppiSize	oRoiSize,
		Npp32f *	pDst,
		Npp8u *	pDeviceBuffer
	)

One-channel 32-bit floating point image QualityIndex.

For common parameter descriptions, see Common parameters for nppiQualityIndex functions.

NppStatus nppiQualityIndex_32f_C3R	(	const Npp32f *	pSrc1,
		int	nSrc1Step,
		const Npp32f *	pSrc2,
		int	nSrc2Step,
		NppiSize	oRoiSize,
		Npp32f *	pDst,
		Npp8u *	pDeviceBuffer
	)

Three-channel 32-bit floating point image QualityIndex.

For common parameter descriptions, see Common parameters for nppiQualityIndex functions.

NppStatus nppiQualityIndex_8u32f_AC4R	(	const Npp8u *	pSrc1,
		int	nSrc1Step,
		const Npp8u *	pSrc2,
		int	nSrc2Step,
		NppiSize	oRoiSize,
		Npp32f *	pDst,
		Npp8u *	pDeviceBuffer
	)

Four-channel 8-bit unsigned image QualityIndex.

For common parameter descriptions, see Common parameters for nppiQualityIndex functions.

NppStatus nppiQualityIndex_8u32f_C1R	(	const Npp8u *	pSrc1,
		int	nSrc1Step,
		const Npp8u *	pSrc2,
		int	nSrc2Step,
		NppiSize	oRoiSize,
		Npp32f *	pDst,
		Npp8u *	pDeviceBuffer
	)

One-channel 8-bit unsigned image QualityIndex.

For common parameter descriptions, see Common parameters for nppiQualityIndex functions.

NppStatus nppiQualityIndex_8u32f_C3R	(	const Npp8u *	pSrc1,
		int	nSrc1Step,
		const Npp8u *	pSrc2,
		int	nSrc2Step,
		NppiSize	oRoiSize,
		Npp32f *	pDst,
		Npp8u *	pDeviceBuffer
	)

Three-channel 8-bit unsigned image QualityIndex.

For common parameter descriptions, see Common parameters for nppiQualityIndex functions.

NppStatus nppiQualityIndexGetBufferHostSize_16u32f_AC4R	(	NppiSize	oSizeROI,
		int *	hpBufferSize
	)

Buffer size (in bytes) for nppiQualityIndex_16u32f_AC4R.

For common parameter descriptions, see CommonGetBufferHostSizeParameters.

NppStatus nppiQualityIndexGetBufferHostSize_16u32f_C1R	(	NppiSize	oSizeROI,
		int *	hpBufferSize
	)

Buffer size (in bytes) for nppiQualityIndex_16u32f_C1R.

For common parameter descriptions, see CommonGetBufferHostSizeParameters.

NppStatus nppiQualityIndexGetBufferHostSize_16u32f_C3R	(	NppiSize	oSizeROI,
		int *	hpBufferSize
	)

Buffer size (in bytes) for nppiQualityIndex_16u32f_C3R.

For common parameter descriptions, see CommonGetBufferHostSizeParameters.

NppStatus nppiQualityIndexGetBufferHostSize_32f_AC4R	(	NppiSize	oSizeROI,
		int *	hpBufferSize
	)

Buffer size (in bytes) for nppiQualityIndex_32f_AC4R.

For common parameter descriptions, see CommonGetBufferHostSizeParameters.

NppStatus nppiQualityIndexGetBufferHostSize_32f_C1R	(	NppiSize	oSizeROI,
		int *	hpBufferSize
	)

Buffer size (in bytes) for nppiQualityIndex_32f_C1R.

For common parameter descriptions, see CommonGetBufferHostSizeParameters.

NppStatus nppiQualityIndexGetBufferHostSize_32f_C3R	(	NppiSize	oSizeROI,
		int *	hpBufferSize
	)

Buffer size (in bytes) for nppiQualityIndex_32f_C3R.

For common parameter descriptions, see CommonGetBufferHostSizeParameters.

NppStatus nppiQualityIndexGetBufferHostSize_8u32f_AC4R	(	NppiSize	oSizeROI,
		int *	hpBufferSize
	)

Buffer size (in bytes) for nppiQualityIndex_8u32f_AC4R.

For common parameter descriptions, see CommonGetBufferHostSizeParameters.

NppStatus nppiQualityIndexGetBufferHostSize_8u32f_C1R	(	NppiSize	oSizeROI,
		int *	hpBufferSize
	)

Buffer size (in bytes) for nppiQualityIndex_8u32f_C1R.

For common parameter descriptions, see CommonGetBufferHostSizeParameters.

NppStatus nppiQualityIndexGetBufferHostSize_8u32f_C3R	(	NppiSize	oSizeROI,
		int *	hpBufferSize
	)

Buffer size (in bytes) for nppiQualityIndex_8u32f_C3R.

For common parameter descriptions, see CommonGetBufferHostSizeParameters.

QualityIndex

Common parameters for nppiQualityIndex functions include:

QualityIndexGetBufferHostSize

Detailed Description

Function Documentation