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/********************************************************
Author: Abhilasha Sancheti & Sukul Bagai
*********************************************************
contours = findcontours(input_image(after canny is applied on it), mode, method, point_x, point_y)
********************************************************/
#include <numeric>
#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/opencv.hpp"
#include <iostream>
using namespace cv;
using namespace std;
extern "C"
{
#include "api_scilab.h"
#include "Scierror.h"
#include "BOOL.h"
#include <localization.h>
#include <sciprint.h>
#include "../common.h"
int opencv_findContours(char *fname, unsigned long fname_len)
{
SciErr sciErr;
int intErr=0;
int iRows=0,iCols=0;
int *piLen2=NULL;
int *piLen3 = NULL;
int *piAddrNew = NULL;
int *piAddr2 = NULL;
int *piAddr3 = NULL;
int *piAddr4 = NULL;
int *piAddr5 = NULL;
int i,j,k, findmode , findmethod;
char **find_method=NULL , **mode = NULL;
double x,y;
//checking input argument
CheckInputArgument(pvApiCtx, 5, 5);
CheckOutputArgument(pvApiCtx, 1, 1) ;
Mat src;
retrieveImage(src,1);
// for mode parameter of findContours
sciErr = getVarAddressFromPosition(pvApiCtx,2,&piAddr2);
//checking for error if any
if (sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
sciErr = getMatrixOfString(pvApiCtx, piAddr2, &iRows, &iCols, NULL, NULL);
piLen2 = (int*)malloc(sizeof(int) * iRows * iCols);
//second call to retrieve length of each string of first argument
sciErr = getMatrixOfString(pvApiCtx, piAddr2, &iRows, &iCols, piLen2, NULL);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
mode= (char**)malloc(sizeof(char*) * iRows * iCols);
for(i = 0 ; i < iRows * iCols ; i++)
{
mode[i] = (char*)malloc(sizeof(char) * (piLen2[i] + 1));//+ 1 for null termination
}
//third call to retrieve data of each string of first argument
sciErr = getMatrixOfString(pvApiCtx, piAddr2, &iRows, &iCols, piLen2, mode);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
// for method parameter of findContours
sciErr = getVarAddressFromPosition(pvApiCtx,3,&piAddr3);
//checking for error if any
if (sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
sciErr = getMatrixOfString(pvApiCtx, piAddr3, &iRows, &iCols, NULL, NULL);
piLen3 = (int*)malloc(sizeof(int) * iRows * iCols);
//second call to retrieve length of each string of first argument
sciErr = getMatrixOfString(pvApiCtx, piAddr3, &iRows, &iCols, piLen3, NULL);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
find_method= (char**)malloc(sizeof(char*) * iRows * iCols);
for(i = 0 ; i < iRows * iCols ; i++)
{
find_method[i] = (char*)malloc(sizeof(char) * (piLen3[i] + 1));//+ 1 for null termination
}
//third call to retrieve data of each string of first argument
sciErr = getMatrixOfString(pvApiCtx, piAddr3, &iRows, &iCols, piLen3, find_method);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//toget the x coordinate of point parameter of findcontours
sciErr = getVarAddressFromPosition(pvApiCtx,4,&piAddr4);
if (sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
intErr = getScalarDouble(pvApiCtx, piAddr4,&x);
if(intErr)
return intErr;
//toget the y coordinate of point parameter of findcontours
sciErr = getVarAddressFromPosition(pvApiCtx,5,&piAddr5);
if (sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
intErr = getScalarDouble(pvApiCtx, piAddr5 ,&y);
if(intErr)
return intErr;
//to set hte mode for findcontour
if (strcmp(mode[0],"CV_RETR_EXTERNAL")==0)
findmode = CV_RETR_EXTERNAL;
else if (strcmp(mode[0],"CV_RETR_LIST")==0)
findmode = CV_RETR_LIST;
else if (strcmp(mode[0],"CV_RETR_CCOMP")==0)
findmode = CV_RETR_CCOMP;
else if (strcmp(mode[0],"CV_RETR_TREE")==0)
findmode = CV_RETR_TREE;
else
{
findmode = CV_RETR_TREE;
sciprint("wrong mode given , using CV_RETR_TREE instead");
}
// to set the method for findContours
if (strcmp(find_method[0],"CV_CHAIN_APPROX_NONE")==0)
findmethod = CV_CHAIN_APPROX_NONE;
else if (strcmp( find_method[0],"CV_CHAIN_APPROX_SIMPLE")==0)
findmethod = CV_CHAIN_APPROX_SIMPLE;
else if (strcmp(find_method[0],"CV_CHAIN_APPROX_TC89_L1")==0)
findmethod = CV_CHAIN_APPROX_TC89_L1;
else if (strcmp(find_method[0],"CV_CHAIN_APPROX_TC89_KCOS")==0)
findmethod = CV_CHAIN_APPROX_TC89_KCOS;
else
{
findmethod = CV_CHAIN_APPROX_SIMPLE;
sciprint("wrong method given , using CV_CHAIN_APPROX_SIMPLE instead");
}
Point pt(x,y);
/// Find contours
vector<vector<Point> > contours;
vector<Vec4i> hierarchy;
findContours( src, contours, hierarchy, findmode, findmethod, pt);
//Assigning the list as the Output Variable
sciErr = createList(pvApiCtx, nbInputArgument(pvApiCtx) + 1, contours.size(), &piAddrNew);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
for(i=0;i<contours.size();i++)
{
double *arr = (double *)malloc(sizeof(double) * 2 * contours[i].size());
for(j=0;j<contours[i].size();j++)
{
*(arr + j*2 + 0) = contours[i][j].x;
*(arr + j*2 + 1) = contours[i][j].y;
}
sciErr = createMatrixOfDoubleInList(pvApiCtx, nbInputArgument(pvApiCtx)+1 , piAddrNew, i+1, contours[i].size(), 2, arr);
free(arr);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
}
AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
//Returning the Output Variables as arguments to the Scilab environment
ReturnArguments(pvApiCtx);
return 0;
}
}
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