FilterGaussBorder

Applies Gauss filter with border.

Syntax

IppStatus ippiFilterGaussBorder_32f_C1R(const Ipp32f* pSrc, int srcStep, Ipp32f* pDst, int dstStep, IppiSize roiSize, int kernelSize, Ipp32f sigma, IppiBorderType borderType, Ipp32f borderValue, Ipp8u* pBuffer);

Parameters

pSrc

Pointer to the source image ROI.

srcStep

Distance in bytes between starts of consecutive lines in the source image.

pDst

Pointer to the destination image ROI.

dstStep

Distance in bytes between starts of consecutive lines in the destination image.

roiSize

Size of the source and destination image ROI.

kernelSize

Specifies the size of the Gaussian kernel, must be odd and greater than or equal to 3.

sigma

Standard deviation of the Gaussian kernel.

borderType

Type of border (see Borders); the following values are possible:

ippBorderConst

Values of all border pixels are set to constant.

ippBorderRepl

Replicated border is used.

ippBorderWrap

Wrapped border is used

ippBorderMirror

Mirrored border is used

ippBorderMirrorR

Mirrored border with replication is used

borderValue

The constant value to assign to the pixels in the constant border (not applicable for other border's type).

pBuffer

Pointer to the working buffer.

Description

The function ippiFilterGaussBorder is declared in the ippcv.h file. It operates with ROI (see Regions of Interest in Intel IPP).

This function applies the Gaussian filter to the source image ROI pSrc. The kernel of this filter is the matrix of size kernelSize*kernelSize with the standard deviation sigma. The values of the elements of the Gaussian kernel are calculated according to the formula:


and then are normalized. The anchor cell is the center of the kernel.

The function requires the working buffer pBuffer whose size should be computed by the function ippiFilterGaussGetBufferSize beforehand.

Return Values

ippStsNoErr

Indicates no error. Any other value indicates an error or a warning.

ippStsNullPtrErr

Indicates an error condition if one of the specified pointers is NULL.

ippStsSizeErr

Indicates an error condition if roiSize has a field with a zero or negative value.

ippStsStepErr

Indicates an error condition if srcStep or dstStep is less than roiSize.width * <pixelSize>.

ippStsNotEvenStepErr

Indicates an error condition if one of the step values is not divisible by 4.

ippStsBorderErr

Indicates an error condition if borderType has a wrong value.

ippStsBadArgErr

Indicates an error condition if kernelSize is less than 3, or sigma is less than or equal to 0.

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