Visible to Intel only — GUID: GUID-CE687419-BDD3-4A7B-939E-24E738C0C7C4
Visible to Intel only — GUID: GUID-CE687419-BDD3-4A7B-939E-24E738C0C7C4
FilterMedianColor
Filters an image using a color median filter.
Syntax
IppStatus ippiFilterMedianColor_<mod>(const Ipp<datatype>* pSrc, int srcStep, Ipp<datatype>* pDst, int dstStep, IppiSize dstRoiSize, IppiMaskSize mask);
Supported values for mod:
8u_C3R | 16s_C3R | 32f_C3R |
8u_AC4R | 16s_AC4R | 32f_AC4R |
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. |
mask |
Predefined mask of the IppiMaskSize type. |
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
When applied to a color image, the previously described median filtering functions process color planes of an image separately, and as a result any correlation between color components is lost. If you want to preserve this information, use the ippiFilterMedianColor function instead. For each input pixel, this function computes differences between red (R), green (G), and blue (B) color components of pixels in the mask neighborhood and the input pixel. The distance between the input pixel i and the neighborhood pixel j is formed as the sum of absolute values:
abs (R(i)-R(j)) + abs (G(i)-G(j)) + abs (B(i)-B(j))
After scanning the entire neighborhood, the function sets the output value for pixel i as the value of the neighborhood pixel with the smallest distance to i.
The function ippiFilterMedianColor supports square masks of size either ippMskSize3x3 or ippMskSize5x5 and processes color images only. To ensure valid operation when image boundary pixels are processed, the application should correctly define additional border pixels (see Borders in Neighborhood Operations).
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 mask has an illegal value. |