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/* ==================================================================== */
/* Author :Priyanka Hiranandani NIT Surat */
/* ==================================================================== */
/* overloaded function */
/* Syntax : return_matrix_3_xyz_values=xyz2lab(matrix_of_3_labvalues a) */
/* ==================================================================== */
/* ==================================================================== */
#include <numeric>
#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/opencv.hpp"
#include <iostream>
#include<stdio.h>
#include <sciprint.h>
#include<string.h>
using namespace cv;
using namespace std;
extern "C"
{
#include "api_scilab.h"
#include "Scierror.h"
#include "BOOL.h"
#include <localization.h>
#include "../common.h"
#define REF_X .9504; // Observer= 2°, Illuminant= D65
#define REF_Y 1.00000;
#define REF_Z 1.08883;
struct Color
{
float R,G,B,X,Y,Z,L,a,b;
};
Color xyz2lab3(float X,float Y, float Z)
{
float eps = 216.f/24389.f;
float k = 24389.f/27.f;
float fx,fy,fz,Ls,as,bs;
float xr=X/REF_X;
float yr=Y/REF_Y;
float zr=Z/REF_Z;
if (xr > eps)
fx = (float)pow(xr, 1/3.);
else
fx = (float) ((k * xr + 16.) / 116.);
if (yr > eps)
fy = (float)pow(yr, 1/3.);
else
fy = (float) ((k * yr + 16.) / 116.);
if (zr > eps)
fz = (float)pow(zr, 1/3.);
else
fz = (float) ((k * zr + 16.) / 116);
Ls = ( 116 * fy ) - 16;
as = 500*(fx-fy);
bs = 200*(fy-fz);
Color lab;
lab.L =Ls;
lab.a =as;
lab.b =bs;
return lab;
}
int xyz2lab(char *fname, unsigned long fname_len)
{
// Error management variable
SciErr sciErr;
//variable info
int iRows=0;
int iCols=0;
int piRows=0;
int piCols=0;
int* piAddr=NULL;
int* piAddr1=NULL;
int* piAddr3=NULL;
double *value=NULL;
double *pstDataR = NULL;
double *pstDataG = NULL;
double *pstDataB = NULL;
int* piLen= NULL;
char **val;
int i,j;
int error;
Color out;
double check;
Mat img,dst;
float R,G,B;
int *piAddrNew = NULL;
double *r,*g,*b;
int k=0;
//checking output argument
CheckOutputArgument(pvApiCtx,1,1);
//retrive address of the list
sciErr = getVarAddressFromPosition(pvApiCtx,1,&piAddr);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//retrive the matrix of the R values
sciErr = getMatrixOfDoubleInList(pvApiCtx, piAddr, 1, &iRows, &iCols, &pstDataR);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//retrive address of the list
sciErr = getVarAddressFromPosition(pvApiCtx,1,&piAddr);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//retrive the matrix of the G values
sciErr = getMatrixOfDoubleInList(pvApiCtx, piAddr, 2, &iRows, &iCols, &pstDataG);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//retrive address of the list
sciErr = getVarAddressFromPosition(pvApiCtx,1,&piAddr);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//retrive the matrix of the B values
sciErr = getMatrixOfDoubleInList(pvApiCtx, piAddr, 3, &iRows, &iCols, &pstDataB);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//dynamically allocating memory to varibles
r=(double *)malloc(sizeof(double)*iRows*iCols);
g=(double *)malloc(sizeof(double)*iRows*iCols);
b=(double *)malloc(sizeof(double)*iRows*iCols);
for(int i=0;i<iRows;i++)
{
for(int j=0;j<iCols;j++)
{
R=(pstDataR[k]);
G=(pstDataG[k]);
B= (pstDataB[k++]);
out=xyz2lab3(R,G,B);
r[j*iRows+i]=(out.L);
g[j*iRows+i]=(out.a);
b[j*iRows+i]=(out.b);
}
}
sciErr = createList(pvApiCtx, nbInputArgument(pvApiCtx) + 1, 3, &piAddrNew);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//Adding the R value matrix to the list to be returned
sciErr = createMatrixOfDoubleInList(pvApiCtx, nbInputArgument(pvApiCtx)+1 , piAddrNew, 1, iRows,iCols, r);
free(r);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//Adding the G value matrix to the list to be returned
sciErr = createMatrixOfDoubleInList(pvApiCtx, nbInputArgument(pvApiCtx)+1 , piAddrNew, 2, iRows, iCols, g);
free(g);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//Adding the B value matrix to the list to be returned
sciErr = createMatrixOfDoubleInList(pvApiCtx, nbInputArgument(pvApiCtx)+1 , piAddrNew, 3, iRows, iCols, b);
free(b);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
ReturnArguments(pvApiCtx);
return 0;
}
}
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