Integration Wrappers for Intel® Integrated Performance Primitives Developer Guide and Reference 2019

API Quick Reference Guide

  • 2020
  • 09/30/2019
  • Public Content
Contents

iwiFilterCannyDeriv

Syntax
typedef struct _IwiFilterCannyDerivParams
{
    IppNormType norm;
} IwiFilterCannyDerivParams;
static IW_INLINE void iwiFilterCannyDeriv_SetDefaultParams(
    IwiFilterCannyDerivParams *pParams
)
IW_DECL(IppStatus) iwiFilterCannyDeriv(
    const IwiImage                  *pSrcImageDx,
    const IwiImage                  *pSrcImageDy,
    IwiImage                        *pDstImage,
    Ipp32f                           treshLow,
    Ipp32f                           treshHigh
    const IwiFilterCannyDerivParams *pAuxParams
);
Parameters
pSrcImageDx
Pointer to the X derivative of the source image.
pSrcImageDy
Pointer to the Y derivative of the source image.
pDstImage
Pointer to the destination image.
treshLow
Lower threshold for edges detection.
treshHigh
Upper threshold for edges detection.
pAuxParams
Pointer to the auxiliary parameters structure. If
NULL
, default parameters are used.
Auxiliary Arguments
Argument
Default Value
Description
norm
ippNormL2
Normalization mode. Supported values:
ippNormL1
 and
ippNormL2
.
Description
This function applies the Canny edge detector to the input image derivatives.
This function supports the following features:
Feature
Support
Internal threading
No
Manual tiling
No
IwiTile
 simple tiling
No
IwiTile
 pipeline tiling
No
Return Values
ippStsDataTypeErr
The
dataType
 value is illegal.
ippStsNumChannelsErr
The
channels
 value is illegal.
ippStsNotEvenStepErr
The
srcStep
 and/or
dstStep
 value is not divisible by size of elements.
ippStsNoMemErr
Failed to allocate memory.
ippStsSizeErr
Values of the
size
 fields are illegal.
ippStsNullPtrErr
At least one of the pointers is
NULL
.
ippStsNoErr
No errors.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.