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*/
// A simple example of performing two-dimensional adaptive noise-removal filtering of an image using Wiener filter
// implemented with Intel(R) Integrated Primitives (Intel(R) IPP) functions:
// ippiFilterWienerGetBufferSize
// ippiFilterWiener_32f_C1R
#include <stdio.h>
#include "ipp.h"
#define WIDTH 128 /* image width */
#define HEIGHT 64 /* image height */
/* Next two defines are created to simplify code reading and understanding */
#define EXIT_MAIN exitLine: /* Label for Exit */
#define check_sts(st) if((st) != ippStsNoErr) goto exitLine; /* Go to Exit if Intel(R) IPP function returned status different from ippStsNoErr */
/* Results of ippMalloc() are not validated because Intel(R) IPP functions perform bad arguments check and will return an appropriate status */
int main(void)
{
IppStatus status = ippStsNoErr;
Ipp32f* pSrc = NULL, *pDst = NULL; /* Pointers to source/destination images */
Ipp32f* pSrcW = NULL; /* Pointers to source ROI image */
int srcStep, dstStep; /* Steps, in bytes, through the source/destination images */
IppiSize roiSize = { WIDTH, HEIGHT }; /* Size of source/destination in pixels */
IppiSize maskSize = { 3, 3 };
IppiSize dstRoiSize = {0}; /* Size of destination ROI in pixels */
IppiPoint anchor = { 1, 1 }; /* Anchor cell specifying the mask alignment\
with respect to the position of the input pixel */
Ipp32f noise[1] = { 0.0 }; /* Noise level value */
Ipp8u *pBuffer = NULL; /* Pointer to the work buffer */
int iTmpBufSize = 0; /* Common work buffer size */
int numChannels = 1;
dstRoiSize.width = WIDTH - maskSize.width;
dstRoiSize.height = HEIGHT - maskSize.height;
/* memory allocation */
pSrc = ippiMalloc_32f_C1(roiSize.width, roiSize.height, &srcStep);
pDst = ippiMalloc_32f_C1(roiSize.width, roiSize.height, &dstStep);
check_sts( status = ippiImageJaehne_32f_C1R(pSrc, srcStep, roiSize) ) /* fill source image */
check_sts( status = ippiFilterWienerGetBufferSize(dstRoiSize, maskSize, numChannels, &iTmpBufSize) )
check_sts( status = ippiSet_32f_C1R(1.f, pDst, dstStep, roiSize) )
pBuffer = ippsMalloc_8u(iTmpBufSize);
pSrcW = (Ipp32f*)((Ipp8u*)(pSrc + anchor.x) + anchor.y * srcStep);
check_sts( status = ippiFilterWiener_32f_C1R(pSrcW, srcStep, pDst, dstStep, dstRoiSize, maskSize, anchor, noise, pBuffer) )
EXIT_MAIN
ippsFree(pBuffer);
ippiFree(pSrc);
ippiFree(pDst);
printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status));
return (int)status;
}