/*
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*/
// A simple example of the edge detection algorithm implemented with Intel(R) Integrated Primitives (Intel(R) IPP) functions:
// ippiFilterSobelNegVertBorder_8u16s_C1R
// ippiFilterSobelHorizBorder_8u16s_C1R
// ippiCanny_16s8u_C1R
#include <stdio.h>
#include "ipp.h"
#define WIDTH 128 /* image width */
#define HEIGHT 64 /* image height */
#define THRESH_LOW 50.f /* Low threshold for edges detection */
#define THRESH_HIGHT 150.f /* Upper threshold for edges detection */
#define BORDER_VAL 0
/* 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;
Ipp8u* pSrc = NULL, *pDst = NULL; /* Pointers to source/destination images */
int srcStep = 0, dstStep = 0; /* Steps, in bytes, through the source/destination images */
IppiSize roiSize = { WIDTH, HEIGHT }; /* Size of source/destination ROI in pixels */
int iTmpBufSizeSobV = 0;
int iTmpBufSizeSobH = 0;
int iTmpBufSizeCanny = 0;
int iTmpBufSize = 0; /* Common work buffer size */
int dxStep = 0, dyStep = 0; /* Steps, in bytes, through buffer_dx/buffer_dy */
Ipp8u *buffer = NULL; /* Pointer to the common work buffer */
Ipp16s* buffer_dx = NULL, *buffer_dy = NULL; /* Pointer to the buffer for first derivatives with respect to X / Y */
pSrc = ippiMalloc_8u_C1(roiSize.width, roiSize.height, &srcStep);
pDst = ippiMalloc_8u_C1(roiSize.width, roiSize.height, &dstStep);
/* Start Edge Detection algorithm */
{
buffer_dx = ippiMalloc_16s_C1(roiSize.width, roiSize.height, &dxStep);
buffer_dy = ippiMalloc_16s_C1(roiSize.width, roiSize.height, &dyStep);
check_sts( status = ippiFilterSobelVertBorderGetBufferSize(roiSize, ippMskSize3x3, ipp8u, ipp16s, 1, &iTmpBufSizeSobV) )
check_sts( status = ippiFilterSobelHorizBorderGetBufferSize(roiSize, ippMskSize3x3, ipp8u, ipp16s, 1, &iTmpBufSizeSobH) )
check_sts( ippiCannyGetSize(roiSize, &iTmpBufSizeCanny) )
/* Find maximum buffer size */
iTmpBufSize = (iTmpBufSizeSobV > iTmpBufSizeSobH) ? iTmpBufSizeSobV : iTmpBufSizeSobH;
iTmpBufSize = (iTmpBufSize > iTmpBufSizeCanny) ? iTmpBufSize : iTmpBufSizeCanny;
buffer = ippsMalloc_8u(iTmpBufSize);
check_sts( status = ippiFilterSobelNegVertBorder_8u16s_C1R(pSrc, srcStep, buffer_dx, dxStep, roiSize, ippMskSize3x3, ippBorderRepl, BORDER_VAL, buffer) )
check_sts( status = ippiFilterSobelHorizBorder_8u16s_C1R(pSrc, srcStep, buffer_dy, dyStep, roiSize, ippMskSize3x3, ippBorderRepl, BORDER_VAL, buffer) )
check_sts( status = ippiCanny_16s8u_C1R(buffer_dx, dxStep, buffer_dy, dyStep, pDst, dstStep, roiSize, THRESH_LOW, THRESH_HIGHT, buffer) )
}
EXIT_MAIN
ippsFree(buffer);
ippiFree(buffer_dx);
ippiFree(buffer_dy);
ippiFree(pSrc);
ippiFree(pDst);
printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status));
return (int)status;
}