Developer Reference

  • 2021
  • 01/25/2021
  • Public Content
Contents

FilterMedian

Filters an image using a median filter.

Syntax

IppStatus ippiFilterMedian_<mod>(const Ipp<datatype>*
pSrc
, int
srcStep
, Ipp<datatype>*
pDst
, int
dstStep
, IppiSize
dstRoiSize
, IppiSize
maskSize
, IppiPoint
anchor
, Ipp8u*
pBuffer
);
Supported values for
mod
:
32f_C3R
32f_C4R
64f_C1R
Include Files
ippi.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
,
ipps.h
Libraries:
ippcore.lib
,
ippvm.lib
,
ipps.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.
dstRoiSize
Size of the source and destination ROI in pixels.
maskSize
Size of the mask in pixels.
anchor
Anchor cell specifying the mask alignment with respect to the position of the input pixel.
pBuffer
Pointer to the external work buffer.
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function sets each pixel in the output buffer as the median value of all the input pixel values taken in the neighborhood of the processed pixel. To ensure valid operation when image boundary pixels are processed, the application should correctly define additional border pixels (see Borders in Neighborhood Operations). The anchor cell is specified by its coordinates
anchor.x
and
anchor.y
in the coordinate system associated with the top left corner of the kernel. The size of the source image ROI is equal to the size of the destination image ROI
dstRoiSize
.
Some flavors of the function require the external buffer
pBuffer
. Prior to using this functions, compute the size of the external buffer by using the function FilterMedianGetBufferSize.
Return Values
ippStsNoErr
Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr
Indicates an error if
pSrc
or
pDst
is
NULL
.
ippStsSizeErr
Indicates an error if
dstRoiSize
has a field with a zero or negative value.
ippStsStepErr
Indicates an error if
srcStep
or
dstStep
has a zero or negative value.
ippStsMaskSizeErr
Indicates an error if
maskSize
has a field with zero, negative, or even value.
ippStsAnchorErr
Indicates an error if
anchor
is outside the mask size.

Product and Performance Information

1

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