FilterMedianCross

Filters an image using a cross median filter.

Syntax

IppStatus ippiFilterMedianCross_<mod>(const Ipp<datatype>* pSrc, int srcStep, Ipp<datatype>* pDst, int dstStep, IppiSize dstRoiSize, IppiMaskSize mask);

Supported values for mod:

8u_C1R	16u_C1R	16s_C1R
8u_C3R	16u_C3R	16s_C3R
8u_AC4R	16u_AC4R	16s_AC4R

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.
mask	Predefined mask of IppiMaskSize type.

Description

The function ippiFilterMedianCross is declared in the ippi.h file. It 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. The neighborhood is determined by the square mask of the predefined size, which can be either ippMskSize3x3 or ippMskSize5x5 (see Table “Median Filter Mask, Neighborhood, and Anchor Cell”). The function is used on the assumption that the pixels outside of the source image ROI exist along the distance of half 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). The size of the source image ROI is equal to dstRoiSize, the size of the destination image ROI.

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr	Indicates an error condition if pSrc or pDst is NULL.
ippStsSizeErr	Indicates an error condition if dstRoiSize has a field with a zero or negative value.
ippStsStepErr	Indicates an error condition if srcStep or dstStep has a zero or negative value.
ippStsMaskSizeErr	Indicates an error condition if mask has an illegal value.