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/********************************************************
Author: Vinay Bhat
********************************************************
Usage: return_image = roipoly(input_image, column_list, row_list)
Example:
im = roipoly(image, [0 100 100 0], [0 0 100 100])
********************************************************/
#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_roipoly(char *fname, unsigned long fname_len)
{
SciErr sciErr;
int intErr = 0;
int iRowsR=0,iColsR=0,iColsC=0,iRowsC=0;
int *piAddr = NULL;
int *piAddr2 = NULL;
double *pstDataR = NULL;
double *pstDataC = NULL;
int i, number_of_points;
int lineType = 8;
//checking input argument
CheckInputArgument(pvApiCtx, 3, 4);
CheckOutputArgument(pvApiCtx, 1, 1) ;
// Get the input image from the Scilab environment
Mat image;
retrieveImage(image, 1);
// Get the address of 2nd argument, the column list
sciErr = getVarAddressFromPosition(pvApiCtx, 2, &piAddr);
if (sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
// Get the address of the 3rd agument, the row list
sciErr = getVarAddressFromPosition(pvApiCtx, 3, &piAddr2);
if (sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
// Get the column list in the form of a matrix
// No. of columns = No. of elements in the list
// No. of rows = 1
sciErr = getMatrixOfDouble(pvApiCtx, piAddr, &iRowsC, &iColsC, &pstDataC);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
if (iRowsC != 1)
{
sciprint("Please enter a list of column coordinates.\n");
return 0;
}
// Get the row list in the form of a matrix
// No. of columns = No. of elements in the list
// No. of rows = 1
sciErr = getMatrixOfDouble(pvApiCtx, piAddr2, &iRowsR, &iColsR, &pstDataR);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
if (iRowsR != 1)
{
sciprint("Please enter a list of row coordinates.\n");
return 0;
}
if (iColsC != iColsR)
{
sciprint("Please ensure number of elements in both row and column lists are equal.\n");
return 0;
}
// Number of points is number of columns
number_of_points = iColsC;
// Create the n points which define
// the polygon
Point points[1][number_of_points];
for (i = 0; i < number_of_points; i++)
{
if (pstDataR[i] < 0 || pstDataC[i] < 0)
{
sciprint("Coordinates cannot be negative.\n");
return 0;
}
else
points[0][i] = Point(pstDataR[i], pstDataC[i]);
}
const Point* ppt[1] = { points[0] };
int npt[] = { number_of_points };
// Create a new, white, blank image same size as of input
Mat img = Mat::zeros(image.size(), image.type());
// Call the fillPoly OpenCV function
// Fill the blank image in the polygon specified
// by the points
fillPoly(img, ppt, npt, 1, Scalar(255, 255, 255), lineType);
string tempstring = type2str(img.type());
char *checker;
checker = (char *)malloc(tempstring.size() + 1);
memcpy(checker, tempstring.c_str(), tempstring.size() + 1);
returnImage(checker, img, 1);
free(checker);
//Assigning the list as the Output Variable
AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
//Returning the Output Variables as arguments to the Scilab environment
ReturnArguments(pvApiCtx);
return 0;
}
/* ==================================================================== */
}
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