FilterLowpassBorder
Applies lowpass filter with border.
Syntax
IppStatus ippiFilterLowpassBorder_8u_C1R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
, int
dstStep
, IppiSize
roiSize
, IppiMaskSize
mask
, IppiBorderType
borderType
, Ipp8u
borderValue
, Ipp8u*
pBuffer
);
IppStatus ippiFilterLowpassBorder_32f_C1R(const Ipp32f*
pSrc
, int
srcStep
, Ipp32f*
pDst
, int
dstStep
, IppiSize
roiSize
, IppiMaskSize
mask
, IppiBorderType
borderType
, Ipp32f
borderValue
, Ipp8u*
pBuffer
);
Include Files
ippcv.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
,
ipps.h
,
ippi.h
Libraries:
ippcore.lib
,
ippvm.lib
,
ipps.lib
,
ippi.lib
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.
- mask
- Type of the filter kernel.
- borderType
- Type of border (see Borders in Neighborhood Operations); the following values are possible:
- ippBorderConst
- Values of all border pixels are set to constant.
- ippBorderRepl
- Replicated border 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
This function operates with ROI (see Regions of Interest in Intel IPP).
This function applies the lowpass filter (blur operation) to the source image
pSrc
and stores results to the destination image of the same size pDst
. Source image can be used as the destination image if they both have the same data type. The values of border pixels are assigned in accordance with the borderType
and borderValue
parameters. The kernel of this filter is the matrix of either 3x3 or 5x5 size that is specified by the parameter mask
. The anchor cell is the center cell (red) of the kernel.The 3x3 filter uses the kernel with the following values:
1/9 1/9 1/9
1/91/91/9
1/9 1/9 1/9
The 5x5 filter uses the kernel with the following values:
1/25 1/25 1/25 1/25 1/25
1/25 1/25 1/25 1/25 1/25
1/25 1/251/251/25 1/25
1/25 1/25 1/25 1/25 1/25
1/25 1/25 1/25 1/25 1/25
The function requires the working buffer
pBuffer
whose size should be computed by the function ippiFilterLowpassGetBufferSize
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 isNULL.
- ippStsSizeErr
- Indicates an error condition ifroiSizehas a field with a zero or negative value.
- ippStsStepErr
- Indicates an error condition ifsrcStepordstStepis less thanroiSize.width* <pixelSize>.
- ippStsNotEvenStepErr
- Indicates an error condition if one of the step values is not divisible by 4 for floating-point images.
- ippStsBorderErr
- Indicates an error condition ifborderTypehas a wrong value.
- ippStsMaskErr
- Indicates an error condition ifmaskhas a wrong value.