NVIDIA 2D Image And Signal Performance Primitives (NPP)  Version 11.1.0.*
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SqrIntegral
Statistical Operations

Primitives for computing both the integral and the squared integral images of a given image. More...

SqrIntegral

Given an input image $pSrc$ and the specified value $nVal$, the pixel value of the integral image $pDst$ at coordinate (i, j) will be computed as

\[pDst(j,i) = nVal + \sum_{l=0}^{j-1}\sum_{k=0}^{i-1}pSrc(l,k)\]

Given an input image $pSrc$ and the specified value $nValSqr$, the pixel value of the squared integral image $pSqr$ at coordinate (i, j) will be computed as

\[pSqr(j,i) = nValSqr + \sum_{l=0}^{j-1}\sum_{k=0}^{i-1}{pSrc(l,k)}^2\]

If the size of the input image is $W \times H$, the size of the squared integral image will be $(W+1) \times (H+1)$.

NppStatus  nppiSqrIntegral_8u32s_C1R_Ctx (const Npp8u *pSrc, int nSrcStep, Npp32s *pDst, int nDstStep, Npp32s *pSqr, int nSqrStep, NppiSize oSrcROI, Npp32s nVal, Npp32s nValSqr, NppStreamContext nppStreamCtx)
  One-channel 8-bit unsigned image SqrIntegral. More...
 
NppStatus  nppiSqrIntegral_8u32s_C1R (const Npp8u *pSrc, int nSrcStep, Npp32s *pDst, int nDstStep, Npp32s *pSqr, int nSqrStep, NppiSize oSrcROI, Npp32s nVal, Npp32s nValSqr)
 
NppStatus  nppiSqrIntegral_8u32s64f_C1R_Ctx (const Npp8u *pSrc, int nSrcStep, Npp32s *pDst, int nDstStep, Npp64f *pSqr, int nSqrStep, NppiSize oSrcROI, Npp32s nVal, Npp64f nValSqr, NppStreamContext nppStreamCtx)
  One-channel 8-bit unsigned image SqrIntegral. More...
 
NppStatus  nppiSqrIntegral_8u32s64f_C1R (const Npp8u *pSrc, int nSrcStep, Npp32s *pDst, int nDstStep, Npp64f *pSqr, int nSqrStep, NppiSize oSrcROI, Npp32s nVal, Npp64f nValSqr)
 
NppStatus  nppiSqrIntegral_8u32f64f_C1R_Ctx (const Npp8u *pSrc, int nSrcStep, Npp32f *pDst, int nDstStep, Npp64f *pSqr, int nSqrStep, NppiSize oSrcROI, Npp32f nVal, Npp64f nValSqr, NppStreamContext nppStreamCtx)
  One-channel 8-bit unsigned image SqrIntegral. More...
 
NppStatus  nppiSqrIntegral_8u32f64f_C1R (const Npp8u *pSrc, int nSrcStep, Npp32f *pDst, int nDstStep, Npp64f *pSqr, int nSqrStep, NppiSize oSrcROI, Npp32f nVal, Npp64f nValSqr)
 

Detailed Description

Primitives for computing both the integral and the squared integral images of a given image.

Function Documentation

NppStatus nppiSqrIntegral_8u32f64f_C1R ( const Npp8u *  pSrc,
int  nSrcStep,
Npp32f *  pDst,
int  nDstStep,
Npp64f *  pSqr,
int  nSqrStep,
NppiSize  oSrcROI,
Npp32f  nVal,
Npp64f  nValSqr 
)
NppStatus nppiSqrIntegral_8u32f64f_C1R_Ctx ( const Npp8u *  pSrc,
int  nSrcStep,
Npp32f *  pDst,
int  nDstStep,
Npp64f *  pSqr,
int  nSqrStep,
NppiSize  oSrcROI,
Npp32f  nVal,
Npp64f  nValSqr,
NppStreamContext  nppStreamCtx 
)

One-channel 8-bit unsigned image SqrIntegral.

Destination integral image is 32-bit floating point. Destination square integral image is 64-bit double floating point.

Parameters
pSrc Source-Image Pointer.
nSrcStep Source-Image Line Step.
pDst Destination-Image Pointer.
nDstStep Destination-Image Line Step.
pSqr Destination-Image Pointer.
nSqrStep Destination-Image Line Step.
oSrcROI Region-of-Interest (ROI).
nVal The value to add to pDst image pixels
nValSqr The value to add to pSqr image pixels
nppStreamCtx Application Managed Stream Context.
Returns
Image Data Related Error Codes, ROI Related Error Codes
NppStatus nppiSqrIntegral_8u32s64f_C1R ( const Npp8u *  pSrc,
int  nSrcStep,
Npp32s *  pDst,
int  nDstStep,
Npp64f *  pSqr,
int  nSqrStep,
NppiSize  oSrcROI,
Npp32s  nVal,
Npp64f  nValSqr 
)
NppStatus nppiSqrIntegral_8u32s64f_C1R_Ctx ( const Npp8u *  pSrc,
int  nSrcStep,
Npp32s *  pDst,
int  nDstStep,
Npp64f *  pSqr,
int  nSqrStep,
NppiSize  oSrcROI,
Npp32s  nVal,
Npp64f  nValSqr,
NppStreamContext  nppStreamCtx 
)

One-channel 8-bit unsigned image SqrIntegral.

Destination integral image is 32-bit signed int. Destination square integral image is 64-bit double floating point.

Parameters
pSrc Source-Image Pointer.
nSrcStep Source-Image Line Step.
pDst Destination-Image Pointer.
nDstStep Destination-Image Line Step.
pSqr Destination-Image Pointer.
nSqrStep Destination-Image Line Step.
oSrcROI Region-of-Interest (ROI).
nVal The value to add to pDst image pixels
nValSqr The value to add to pSqr image pixels
nppStreamCtx Application Managed Stream Context.
Returns
Image Data Related Error Codes, ROI Related Error Codes
NppStatus nppiSqrIntegral_8u32s_C1R ( const Npp8u *  pSrc,
int  nSrcStep,
Npp32s *  pDst,
int  nDstStep,
Npp32s *  pSqr,
int  nSqrStep,
NppiSize  oSrcROI,
Npp32s  nVal,
Npp32s  nValSqr 
)
NppStatus nppiSqrIntegral_8u32s_C1R_Ctx ( const Npp8u *  pSrc,
int  nSrcStep,
Npp32s *  pDst,
int  nDstStep,
Npp32s *  pSqr,
int  nSqrStep,
NppiSize  oSrcROI,
Npp32s  nVal,
Npp32s  nValSqr,
NppStreamContext  nppStreamCtx 
)

One-channel 8-bit unsigned image SqrIntegral.

Destination integral image and square integral image are 32-bit signed int.

Parameters
pSrc Source-Image Pointer.
nSrcStep Source-Image Line Step.
pDst Destination-Image Pointer.
nDstStep Destination-Image Line Step.
pSqr Destination-Image Pointer.
nSqrStep Destination-Image Line Step.
oSrcROI Region-of-Interest (ROI).
nVal The value to add to pDst image pixels
nValSqr The value to add to pSqr image pixels
nppStreamCtx Application Managed Stream Context.
Returns
Image Data Related Error Codes, ROI Related Error Codes