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/********************************************************
Author: Vinay
Function: ind2gray(image, colormap)
********************************************************/
#include <numeric>
#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/opencv.hpp"
#include <iostream>
using namespace cv;
using namespace std;
void rotate180(Mat &m) {
double temp;
for (int i=0; i<(m.rows+1)/2; i++) {
int k = m.cols;
if ((i+1)>=((m.rows+1)/2) && m.rows%2!=0) {
k = (m.cols+1)/2;
}
for (int j=0; j<k; j++) {
temp = m.at<double>(i, j);
m.at<double>(i, j) = m.at<double>(m.rows-i-1, m.cols-j-1);
m.at<double>(m.rows-i-1, m.cols-j-1) = temp;
}
}
}
Mat fftshift(Mat m) {
int a = m.rows/2;
int b = m.cols/2;
Mat r = Mat::zeros(m.size(), m.type());
for (int i=0; i<m.rows; i++) {
for (int j=0; j<m.cols; j++) {
r.at<double>((i+a)%m.rows, (j+b)%m.cols) = m.at<double>(i, j);
}
}
return r;
}
extern "C"
{
#include "api_scilab.h"
#include "Scierror.h"
#include "BOOL.h"
#include <localization.h>
#include "sciprint.h"
#include "../common.h"
int opencv_fsamp2(char *fname, unsigned long fname_len)
{
SciErr sciErr;
int intErr = 0;
int iRows=0,iCols=0;
int cRows=0,cCols=0;
int *piAddr = NULL;
int *piAddrNew = NULL;
//checking input argument
CheckInputArgument(pvApiCtx, 1, 4);
CheckOutputArgument(pvApiCtx, 1, 1) ;
// Mat image, imgcpy;
// retrieveImage(image, 1);
// string tempstring = type2str(image.type());
// char *imtype;
// imtype = (char *)malloc(tempstring.size() + 1);
// memcpy(imtype, tempstring.c_str(), tempstring.size() + 1);
// bool integer = true;
// int scale = 1;
// double error = 0;
if (nbInputArgument(pvApiCtx) == 1) {
Mat hd, hdcpy;
retrieveImage(hdcpy, 1);
hdcpy.convertTo(hd, CV_64F);
rotate180(hd);
fftshift(hd).copyTo(hd);
rotate180(hd);
Mat padded; //expand input image to optimal size
int m = getOptimalDFTSize( hd.rows );
int n = getOptimalDFTSize( hd.cols ); // on the border add zero values
copyMakeBorder(hd, padded, 0, m - hd.rows, 0, n - hd.cols, BORDER_CONSTANT, Scalar::all(0));
Mat planes[] = {Mat_<double>(padded), Mat::zeros(padded.size(), CV_64F)};
Mat complexI;
merge(planes, 2, complexI); // Add to the expanded another plane with zeros
dft(complexI, complexI, DFT_INVERSE | DFT_SCALE); // this way the result may fit in the source matrix
split(complexI, planes);
fftshift(planes[0]).copyTo(planes[0]);
fftshift(planes[1]).copyTo(planes[1]);
rotate180(planes[0]);
rotate180(planes[1]);
double *re = (double *)malloc(planes[0].rows * planes[0].cols * sizeof(double));
double *im = (double *)malloc(planes[0].rows * planes[0].cols * sizeof(double));
for(int i=0;i<planes[0].rows;i++)
{
for(int j=0;j<planes[0].cols;j++)
{
re[i+planes[0].rows*j]=planes[0].at<double>(i, j);
//cout<<planes[0].at<double>(i, j)<<" ";
im[i+planes[0].rows*j]=planes[1].at<double>(i, j);
}
//cout<<endl;
}
sciErr = createList(pvApiCtx, nbInputArgument(pvApiCtx) + 1, 1, &piAddrNew);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//Adding the R value matrix to the list
//Syntax : createMatrixOfInteger32InList(void* _pvCtx, int _iVar, int* _piParent, int _iItemPos, int _iRows, int _iCols, const int* _piData)
sciErr = createComplexMatrixOfDoubleInList(pvApiCtx, nbInputArgument(pvApiCtx)+1 , piAddrNew, 1, planes[0].rows,planes[0].cols, re, im);
free(re);
free(im);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
}
else if (nbInputArgument(pvApiCtx)==2 || nbInputArgument(pvApiCtx)==3) {
sciprint("1 or 4 arguments expected.");
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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