/*******************************************************************************
* Copyright 2015-2018 Intel Corporation.
*
* This software and the related documents are Intel copyrighted materials, and
* your use of them is governed by the express license under which they were
* provided to you (License). Unless the License provides otherwise, you may not
* use, modify, copy, publish, distribute, disclose or transmit this software or
* the related documents without Intel's prior written permission.
*
* This software and the related documents are provided as is, with no express
* or implied warranties, other than those that are expressly stated in the
* License.
*******************************************************************************/
// A simple example of edge detection algorithm implemented with Intel(R) Integrated Performance Primitives (Intel(R) IPP) functions:
// ippiCannyBorderGetSize
// ippiCannyBorder_8u_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 */
Ipp8u *pBuffer = NULL; /* Pointer to the work buffer */
int iTmpBufSize = 0; /* Common work buffer size */
IppiDifferentialKernel filterType = ippFilterScharr;
pSrc = ippiMalloc_8u_C1(roiSize.width, roiSize.height, &srcStep);
pDst = ippiMalloc_8u_C1(roiSize.width, roiSize.height, &dstStep);
/* Start Edge Detection algorithm */
check_sts( status = ippiCannyBorderGetSize(roiSize, filterType, ippMskSize3x3, ipp8u, &iTmpBufSize) )
pBuffer = ippsMalloc_8u(iTmpBufSize);
check_sts( status = ippiCannyBorder_8u_C1R(pSrc, srcStep, pDst, dstStep, roiSize,
filterType, ippMskSize3x3, ippBorderRepl, BORDER_VAL, THRESH_LOW, THRESH_HIGHT, ippNormL2, pBuffer) )
EXIT_MAIN
ippsFree(pBuffer);
ippiFree(pSrc);
ippiFree(pDst);
printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status));
return (int)status;
}