Developer Reference

  • 2020
  • 07/15/2020
  • Public Content
Contents

FilterMedianWeightedCenter3x3

Filters an image using a median filter with a weighted center pixel.

Syntax

IppStatus ippiFilterMedianWeightedCenter3x3_8u_C1R(const Ipp8u*
pSrc
, int
srcStep
, Ipp8u*
pDst
, int
dstStep
, IppiSize
dstRoiSize
, int
weight
);
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.
weight
Weight of the pixel, must be an odd number.
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function sets each pixel in the destination image as the median value of all the input pixel values taken in the neighborhood of the processed pixel. The neighborhood is determined by the fixed square mask of the 3x3 size with the anchor cell as the center cell of the mask. The parameter
weight
specifies the weight of the processed pixel, that is how many times its value is included into calculations. The value of this parameter should be odd. If it is even, the function changes its value to the nearest less odd number and returns the warning message.
The function operates on the assumption that the pixels outside of the source image ROI exist along the distance equal to half of the mask size. It means that the application program should provide appropriate values for the
pSrc
and
dstRoiSize
arguments, or define additional border pixels (see Borders in Neighborhood Operations). The size of the source image ROI is equal to the size of the destination image ROI
dstRoiSize
.
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.
ippStsWeightErr
Indicates an error if
weight
is less than or equal to 0.
ippStsEvenMedianWeight
Indicates a warning if
weight
has an even value.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804