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/* function-rgb2lab
Author :Tess Zacharias */
#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 .95047; // Observer= 2°, Illuminant= D65
#define REF_Y 1.00000;
#define REF_Z 1.08883;
struct Color
{
float R,G,B,X,Y,Z,Ls,as,bs,r,g,b;
};
Color rgb2lab1(float R, float G, float B)
{
float r = R/255.f; //R 0..1
float g = G/255.f; //G 0..1
float b = B/255.f; //B 0..1
float eps = 216.f/24389.f;
float k = 24389.f/27.f;
float fx,fy,fz;
if (r <= 0.04045)
r = r/12.92;
else
r = (float)pow((r+0.055)/1.055,2.4);
if (g <= 0.04045)
g = g/12.92;
else
g = (float)pow((g+0.055)/1.055,2.4);
if (b <= 0.04045)
b = b/12.92;
else
b = (float)pow((b+0.055)/1.055,2.4);
float X = 0.4124*r + 0.3576*g + 0.1805*b;
float Y = 0.2126*r + 0.7152 *g + 0.0722 *b;
float Z = 0.0193*r + 0.1192*g + 0.9505 *b;
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);
Color lab;
lab.Ls= ( 116 * fy ) - 16;
lab.as= 500*(fx-fy);
lab.bs= 200*(fy-fz);
return lab;
}
Color rgb2lab2(float R, float G, float B,char *s)
{
double REF_X1;
double REF_Y1;
double REF_Z1;
if(!strcmp(s,"a"))
{
REF_X1=1.0985;
REF_Y1= 1.0000;
REF_Z1=0.3558;
}
else if(!strcmp(s,"c"))
{
REF_X1=0.9807;
REF_Y1= 1.0000;
REF_Z1=1.1822;
}
else if(!strcmp(s,"d50"))
{
REF_X1=0.9642;
REF_Y1= 1.0000;
REF_Z1=0.8251;
}
else if(!strcmp(s,"d65"))
{
REF_X1=0.9504;
REF_Y1= 1.0000;
REF_Z1= 1.0888;
}
else if(!strcmp(s,"icc"))
{
REF_X1=0.962;
REF_Y1=1.000;
REF_Z1= 0.8249;
}
else if(!strcmp(s,"e"))
{
REF_X1=1.000;
REF_Y1=1.000;
REF_Z1=1.000;
}
float eps = 216.f/24389.f;
float k = 24389.f/27.f;
float fx,fy,fz,X,Y,Z,xr,yr,zr;
float r = R/255.f; //R 0..1
float g = G/255.f; //G 0..1
float b = B/255.f; //B 0..1
if (r <= 0.04045)
r = r/12.92;
else
r = (float)pow((r+0.055)/1.055,2.4);
if (g <= 0.04045)
g = g/12.92;
else
g = (float)pow((g+0.055)/1.055,2.4);
if (b <= 0.04045)
b = b/12.92;
else
b = (float)pow((b+0.055)/1.055,2.4);
X = 0.4124*r + 0.3576*g + 0.1805*b;
Y = 0.2126*r + 0.7152 *g + 0.0722 *b;
Z = 0.0193*r + 0.1192*g + 0.9505 *b;
xr = X/REF_X1;
yr = Y/REF_Y1;
zr = Z/REF_Z1;
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);
Color lab;
lab.Ls= ( 116 * fy ) - 16;
lab.as= 500*(fx-fy);
lab.bs= 200*(fy-fz);
return lab;
}
int opencv_rgb2lab(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* piAddr2=NULL;
int* piAddr1=NULL;
int* piAddr3=NULL;
int* piaddr=NULL;
char *value=NULL;
int* piLen = NULL;
char **val;
int i,j;
int error;
Color out;
double check;
Mat img;
float R,G,B;
int *piAddrNew = NULL;
CheckOutputArgument(pvApiCtx,1,1);
int m=0;
retrieveImage(img,1);
double *r1,*g1,*b1;
r1=(double *)malloc(sizeof(double)*img.rows*img.cols);
g1=(double *)malloc(sizeof(double)*img.rows*img.cols);
b1=(double *)malloc(sizeof(double)*img.rows*img.cols);
for(int i=0;i<img.rows;i++)
{
for(int j=0;j<img.cols;j++)
{
Vec3b intensity = img.at<Vec3b>(i,j);
R= intensity.val[2];
G= intensity.val[1];
B= intensity.val[0];
out=rgb2lab1(R,G,B);
r1[m]=out.Ls;
g1[m]=out.as;
b1[m++]=out.bs;
}
}
//creating the list that will be passed to the Scilab enviroment
sciErr = createList(pvApiCtx, nbInputArgument(pvApiCtx) + 1, 3, &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 = createMatrixOfDoubleInList(pvApiCtx, nbInputArgument(pvApiCtx)+1 , piAddrNew, 1, img.rows,img.cols, r1);
free(r1);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//Adding the G value matrix to the list
sciErr = createMatrixOfDoubleInList(pvApiCtx, nbInputArgument(pvApiCtx)+1 , piAddrNew, 2, img.rows, img.cols, g1);
free(g1);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
//Adding the B value matrix to the list
sciErr = createMatrixOfDoubleInList(pvApiCtx, nbInputArgument(pvApiCtx)+1 , piAddrNew, 3, img.rows, img.cols, b1);
free(b1);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
// free(checker);
AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
ReturnArguments(pvApiCtx);
return 0;
}
}
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