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1 files changed, 474 insertions, 0 deletions

diff --git a/sci_gateway/cpp/opencv_imshowpair.cpp b/sci_gateway/cpp/opencv_imshowpair.cpp
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+++ b/sci_gateway/cpp/opencv_imshowpair.cpp
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+/*////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+Created By: Riddhish Bhalodia
+Date: 30th September 2015
+
+Usage:
+
+imshowpair(Mat image1,Mat image2,String method,String scaling)
+
+1)  image1   : Input image1
+2)  image2   : Input image2
+3)  method : Method for the type of display
+	
+	| Method 		| Function													|
+	|				|															|	
+	| "montage"		| Display Images side by side								|
+	| "blend"		| Display the blend of two Images	alpha=0.5				|
+	| "diff"		| Display the absolute difference between Images 			|
+	| "falsecolor"	| Display image1 by green channel and image2 by red			|
+
+4)  scaling : The scaling of the images	
+	
+	| Scaling 		| Function													|
+	|				|															|	
+	| "none"		| No scaling to the images 									|
+	| "joint"		| Scale the joint images									|
+	| "independent"	| Scale the images independently before processing 			|
+	
+
+
+*/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+
+
+#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_imshowpair(char *fname, unsigned long fname_len){
+
+  	SciErr sciErr;
+    int intErr = 0;
+    int iRows=0,iCols=0;
+    int *piAddr = NULL;
+    int *piAddrNew = NULL;
+    int *piAddr2  = NULL;
+    int *piAddr3  = NULL;
+    int *piLen1  = NULL;
+    int *piLen2  = NULL;
+    char **method = NULL;
+    char **scaling = NULL;
+    
+	Mat image1,image2;
+    //checking input argument
+    CheckInputArgument(pvApiCtx, 4, 4);
+    CheckOutputArgument(pvApiCtx, 1, 1) ;
+	
+	retrieveImage(image1, 1);
+	retrieveImage(image2, 2);
+
+	sciErr = getVarAddressFromPosition(pvApiCtx, 3, &piAddr2);
+    if (sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+	//Now, we will retrieve the string from the input parameter. For this, we will require 3 calls
+    //first call to retrieve dimensions
+    sciErr = getMatrixOfString(pvApiCtx, piAddr2, &iRows, &iCols, NULL, NULL);
+    if(sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+    piLen1 = (int*)malloc(sizeof(int) * iRows * iCols);
+    //second call to retrieve length of each string
+    sciErr = getMatrixOfString(pvApiCtx, piAddr2, &iRows, &iCols, piLen1, NULL);
+    if(sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+
+    method = (char**)malloc(sizeof(char*) * iRows * iCols);
+    for(int i = 0 ; i < iRows * iCols ; i++)
+        method[i] = (char*)malloc(sizeof(char) * (piLen1[i] + 1));//+ 1 for null termination
+
+    //third call to retrieve data
+    sciErr = getMatrixOfString(pvApiCtx, piAddr2, &iRows, &iCols, piLen1, method);
+    if(sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+
+    // now the fourth argument which is aging a string
+
+    sciErr = getVarAddressFromPosition(pvApiCtx, 4, &piAddr3);
+    if (sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+	//Now, we will retrieve the string from the input parameter. For this, we will require 3 calls
+    //first call to retrieve dimensions
+    sciErr = getMatrixOfString(pvApiCtx, piAddr3, &iRows, &iCols, NULL, NULL);
+    if(sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+    piLen2 = (int*)malloc(sizeof(int) * iRows * iCols);
+    //second call to retrieve length of each string
+    sciErr = getMatrixOfString(pvApiCtx, piAddr3, &iRows, &iCols, piLen2, NULL);
+    if(sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+
+    scaling = (char**)malloc(sizeof(char*) * iRows * iCols);
+    for(int i = 0 ; i < iRows * iCols ; i++)
+        scaling[i] = (char*)malloc(sizeof(char) * (piLen2[i] + 1));//+ 1 for null termination
+
+    //third call to retrieve data
+    sciErr = getMatrixOfString(pvApiCtx, piAddr3, &iRows, &iCols, piLen2, scaling);
+    if(sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+    char x1[15] = "montage";
+	char x2[15] = "diff";
+	char x3[15] = "blend";
+	char x4[15] = "falsecolor";	
+	char y1[15] = "joint";
+	char y2[15] = "independent";
+	char y3[15] = "none";
+    // Error check on method
+    if(!(strcmp(method[0],x1)==0 || strcmp(method[0],x2)==0 || strcmp(method[0],x3)==0 || strcmp(method[0],x4)==0 )){
+    	sciprint("Method input not correct, choose from 'blend','diff','montage' or 'falsecolor' \n");
+        return 0;
+    }
+    // Error check on scaling
+
+    if(!(strcmp(scaling[0],y1)==0 || strcmp(scaling[0],y2)==0 || strcmp(scaling[0],y3)==0  )){
+    	sciprint("Method input not correct, choose from 'none','diff','montage' or 'falsecolor' \n");
+        return 0;
+    }
+
+    int max_rows,max_cols;
+	Mat out;
+	max_rows = max(image1.rows,image2.rows);
+	max_cols = max(image1.cols,image2.cols);
+	if(image1.channels() == 1){ cvtColor(image1,image1,CV_BGR2GRAY);}
+	if(image2.channels() == 1){ cvtColor(image2,image2,CV_BGR2GRAY);}
+
+	vector<Mat> rgbChannels(3);
+	// for montage and no scaling plus joint scaling
+
+	if(strcmp(method[0],x1)==0 && ((strcmp(scaling[0],y1)==0)||(strcmp(scaling[0],y3)==0))) {		
+		out = Mat::zeros(max_rows,2*max_cols,image1.type());	
+		for(int i=0;i<image1.rows;i++){
+			for(int j=0;j<image1.cols;j++){
+				out.at<Vec3b>(i,j)[0] = image1.at<Vec3b>(i,j)[0];
+				out.at<Vec3b>(i,j)[1] = image1.at<Vec3b>(i,j)[1];
+				out.at<Vec3b>(i,j)[2] = image1.at<Vec3b>(i,j)[2];
+			}
+		}
+		for(int i=0;i<image2.rows;i++){
+			for(int j=0;j<image2.cols;j++){
+				out.at<Vec3b>(i,j + max_cols)[0] = image2.at<Vec3b>(i,j)[0];
+				out.at<Vec3b>(i,j + max_cols)[1] = image2.at<Vec3b>(i,j)[1];
+				out.at<Vec3b>(i,j + max_cols)[2] = image2.at<Vec3b>(i,j)[2];
+			}
+		}	
+	}
+	// for montage and scaling independent
+	if(strcmp(method[0],x1)==0 && strcmp(scaling[0],y2)==0) {	
+
+		
+	    split(image1, rgbChannels);
+		normalize(rgbChannels[0],rgbChannels[0],0,255,CV_MINMAX);
+		normalize(rgbChannels[1],rgbChannels[1],0,255,CV_MINMAX);
+		normalize(rgbChannels[2],rgbChannels[2],0,255,CV_MINMAX);
+		merge(rgbChannels,image1);
+		split(image2, rgbChannels);
+		normalize(rgbChannels[0],rgbChannels[0],0,255,CV_MINMAX);
+		normalize(rgbChannels[1],rgbChannels[1],0,255,CV_MINMAX);
+		normalize(rgbChannels[2],rgbChannels[2],0,255,CV_MINMAX);
+		merge(rgbChannels,image2);
+
+		out = Mat::zeros(max_rows,2*max_cols,image1.type());	
+		for(int i=0;i<image1.rows;i++){
+			for(int j=0;j<image1.cols;j++){
+				out.at<Vec3b>(i,j)[0] = image1.at<Vec3b>(i,j)[0];
+				out.at<Vec3b>(i,j)[1] = image1.at<Vec3b>(i,j)[1];
+				out.at<Vec3b>(i,j)[2] = image1.at<Vec3b>(i,j)[2];
+			}
+		}
+		for(int i=0;i<image2.rows;i++){
+			for(int j=0;j<image2.cols;j++){
+				out.at<Vec3b>(i,j + max_cols)[0] = image2.at<Vec3b>(i,j)[0];
+				out.at<Vec3b>(i,j + max_cols)[1] = image2.at<Vec3b>(i,j)[1];
+				out.at<Vec3b>(i,j + max_cols)[2] = image2.at<Vec3b>(i,j)[2];
+			}
+		}	
+	}
+	
+	// for diff and no scaling plus joint scaling
+	if(strcmp(method[0],x2)==0 && ((strcmp(scaling[0],y1)==0)||(strcmp(scaling[0],y3)==0))) {	
+		
+		// cvtColor(image1,image1,CV_BGR2GRAY);
+		// cvtColor(image2,image2,CV_BGR2GRAY);	
+		out = Mat::zeros(max_rows,max_cols,image1.type());
+
+		for(int i=0;i<image1.rows;i++){
+			for(int j=0;j<image1.cols;j++){
+				out.at<Vec3b>(i,j)[0] = (image1.at<Vec3b>(i,j)[0] + image1.at<Vec3b>(i,j)[1] + image1.at<Vec3b>(i,j)[2])/3;
+				out.at<Vec3b>(i,j)[1] = (image1.at<Vec3b>(i,j)[0] + image1.at<Vec3b>(i,j)[1] + image1.at<Vec3b>(i,j)[2])/3;
+				out.at<Vec3b>(i,j)[2] = (image1.at<Vec3b>(i,j)[0] + image1.at<Vec3b>(i,j)[1] + image1.at<Vec3b>(i,j)[2])/3;
+			}
+		}
+		for(int i=0;i<image2.rows;i++){
+			for(int j=0;j<image2.cols;j++){
+				out.at<Vec3b>(i,j)[0] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+				out.at<Vec3b>(i,j)[1] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+				out.at<Vec3b>(i,j)[2] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+			}
+		}
+		for(int i=0;i<min(image1.rows,image2.rows);i++){
+			for(int j=0;j<min(image1.cols,image2.cols);j++){
+				out.at<Vec3b>(i,j)[0] = abs((image1.at<Vec3b>(i,j)[0] + image1.at<Vec3b>(i,j)[1] + image1.at<Vec3b>(i,j)[2]) - (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2]))/3;
+				out.at<Vec3b>(i,j)[1] = abs((image1.at<Vec3b>(i,j)[0] + image1.at<Vec3b>(i,j)[1] + image1.at<Vec3b>(i,j)[2]) - (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2]))/3;
+				out.at<Vec3b>(i,j)[2] = abs((image1.at<Vec3b>(i,j)[0] + image1.at<Vec3b>(i,j)[1] + image1.at<Vec3b>(i,j)[2]) - (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2]))/3;
+			}
+		}	
+	}	
+	// for diff and independent scaling
+	if(strcmp(method[0],x2)==0 && strcmp(scaling[0],y2)==0) {	
+		
+		
+	    split(image1, rgbChannels);
+		normalize(rgbChannels[0],rgbChannels[0],0,255,CV_MINMAX);
+		normalize(rgbChannels[1],rgbChannels[1],0,255,CV_MINMAX);
+		normalize(rgbChannels[2],rgbChannels[2],0,255,CV_MINMAX);
+		merge(rgbChannels,image1);
+		split(image2, rgbChannels);
+		normalize(rgbChannels[0],rgbChannels[0],0,255,CV_MINMAX);
+		normalize(rgbChannels[1],rgbChannels[1],0,255,CV_MINMAX);
+		normalize(rgbChannels[2],rgbChannels[2],0,255,CV_MINMAX);
+		merge(rgbChannels,image2);
+
+		// cvtColor(image1,image1,CV_BGR2GRAY);
+		// cvtColor(image2,image2,CV_BGR2GRAY);	
+		out = Mat::zeros(max_rows,max_cols,image1.type());	
+		for(int i=0;i<image1.rows;i++){
+			for(int j=0;j<image1.cols;j++){
+				out.at<Vec3b>(i,j)[0] = image1.at<Vec3b>(i,j)[0];
+				out.at<Vec3b>(i,j)[1] = image1.at<Vec3b>(i,j)[1];
+				out.at<Vec3b>(i,j)[2] = image1.at<Vec3b>(i,j)[2];
+			}
+		}
+		for(int i=0;i<image2.rows;i++){
+			for(int j=0;j<image2.cols;j++){
+				out.at<Vec3b>(i,j)[0] = image2.at<Vec3b>(i,j)[0];
+				out.at<Vec3b>(i,j)[1] = image2.at<Vec3b>(i,j)[1];
+				out.at<Vec3b>(i,j)[2] = image2.at<Vec3b>(i,j)[2];
+			}
+		}
+		for(int i=0;i<min(image1.rows,image2.rows);i++){
+			for(int j=0;j<min(image1.cols,image2.cols);j++){
+				out.at<Vec3b>(i,j)[0] = abs(image1.at<Vec3b>(i,j)[0] - image2.at<Vec3b>(i,j)[0]);
+				out.at<Vec3b>(i,j)[1] = abs(image1.at<Vec3b>(i,j)[1] - image2.at<Vec3b>(i,j)[1]);
+				out.at<Vec3b>(i,j)[2] = abs(image1.at<Vec3b>(i,j)[2] - image2.at<Vec3b>(i,j)[2]);
+			}
+		}	
+	}	
+	
+	 // for blend and no scaling[0] plus joint scaling[0]
+	if(strcmp(method[0],x3)==0 && ((strcmp(scaling[0],y1)==0)||(strcmp(scaling[0],y3)==0))) {	
+		out = Mat::zeros(max_rows,max_cols,image1.type());
+
+		for(int i=0;i<image1.rows;i++){
+			for(int j=0;j<image1.cols;j++){
+				out.at<Vec3b>(i,j)[0] = image1.at<Vec3b>(i,j)[0];
+				out.at<Vec3b>(i,j)[1] = image1.at<Vec3b>(i,j)[1];
+				out.at<Vec3b>(i,j)[2] = image1.at<Vec3b>(i,j)[2];
+			}
+		}
+		for(int i=0;i<image2.rows;i++){
+			for(int j=0;j<image2.cols;j++){
+				out.at<Vec3b>(i,j)[0] = image2.at<Vec3b>(i,j)[0];
+				out.at<Vec3b>(i,j)[1] = image2.at<Vec3b>(i,j)[1];
+				out.at<Vec3b>(i,j)[2] = image2.at<Vec3b>(i,j)[2];
+			}
+		}
+
+		for(int i=0;i<min(image1.rows,image2.rows);i++){
+			for(int j=0;j<min(image1.cols,image2.cols);j++){
+				out.at<Vec3b>(i,j)[0] = 0.5*(image1.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[0]);
+				out.at<Vec3b>(i,j)[1] = 0.5*(image1.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[1]);
+				out.at<Vec3b>(i,j)[2] = 0.5*(image1.at<Vec3b>(i,j)[2] + image2.at<Vec3b>(i,j)[2]);
+			}
+		}
+
+	}
+	// for blend and independent scaling[0]
+	if(strcmp(method[0],x3)==0 && strcmp(scaling[0],y2)==0) {	
+		out = Mat::zeros(max_rows,max_cols,image1.type());
+		
+	    split(image1, rgbChannels);
+		normalize(rgbChannels[0],rgbChannels[0],0,255,CV_MINMAX);
+		normalize(rgbChannels[1],rgbChannels[1],0,255,CV_MINMAX);
+		normalize(rgbChannels[2],rgbChannels[2],0,255,CV_MINMAX);
+		merge(rgbChannels,image1);
+		split(image2, rgbChannels);
+		normalize(rgbChannels[0],rgbChannels[0],0,255,CV_MINMAX);
+		normalize(rgbChannels[1],rgbChannels[1],0,255,CV_MINMAX);
+		normalize(rgbChannels[2],rgbChannels[2],0,255,CV_MINMAX);
+		merge(rgbChannels,image2);
+
+		for(int i=0;i<image1.rows;i++){
+			for(int j=0;j<image1.cols;j++){
+				out.at<Vec3b>(i,j)[0] = image1.at<Vec3b>(i,j)[0];
+				out.at<Vec3b>(i,j)[1] = image1.at<Vec3b>(i,j)[1];
+				out.at<Vec3b>(i,j)[2] = image1.at<Vec3b>(i,j)[2];
+			}
+		}
+		for(int i=0;i<image2.rows;i++){
+			for(int j=0;j<image2.cols;j++){
+				out.at<Vec3b>(i,j)[0] = image2.at<Vec3b>(i,j)[0];
+				out.at<Vec3b>(i,j)[1] = image2.at<Vec3b>(i,j)[1];
+				out.at<Vec3b>(i,j)[2] = image2.at<Vec3b>(i,j)[2];
+			}
+		}
+
+		for(int i=0;i<min(image1.rows,image2.rows);i++){
+			for(int j=0;j<min(image1.cols,image2.cols);j++){
+				out.at<Vec3b>(i,j)[0] = 0.5*(image1.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[0]);
+				out.at<Vec3b>(i,j)[1] = 0.5*(image1.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[1]);
+				out.at<Vec3b>(i,j)[2] = 0.5*(image1.at<Vec3b>(i,j)[2] + image2.at<Vec3b>(i,j)[2]);
+			}
+		}
+
+	}
+	
+	// for falsecolor and no scaling[0] plus joint scaling[0]
+	if(strcmp(method[0],x4)==0 && ((strcmp(scaling[0],y1)==0)||(strcmp(scaling[0],y3)==0))) {	
+		
+		out = Mat::zeros(max_rows,max_cols,image1.type());
+
+		// image 1 green image2 red
+		for(int i=0;i<image1.rows;i++){
+			for(int j=0;j<image1.cols;j++){
+				out.at<Vec3b>(i,j)[0] = 0;
+				out.at<Vec3b>(i,j)[1] = (image1.at<Vec3b>(i,j)[0] + image1.at<Vec3b>(i,j)[1] + image1.at<Vec3b>(i,j)[2])/3;
+				out.at<Vec3b>(i,j)[2] = 0;
+			}
+		}
+		for(int i=0;i<image2.rows;i++){
+			for(int j=0;j<image2.cols;j++){
+				out.at<Vec3b>(i,j)[0] = 0;
+				out.at<Vec3b>(i,j)[1] = 0;
+				out.at<Vec3b>(i,j)[2] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+			}
+		}
+		for(int i=0;i<min(image1.rows,image2.rows);i++){
+			for(int j=0;j<min(image1.cols,image2.cols);j++){
+				if(image1.at<Vec3b>(i,j) == image2.at<Vec3b>(i,j)){
+					out.at<Vec3b>(i,j)[0] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+					out.at<Vec3b>(i,j)[1] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+					out.at<Vec3b>(i,j)[2] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+				}
+				else{
+					out.at<Vec3b>(i,j)[0] = 0;
+					out.at<Vec3b>(i,j)[1] = (image1.at<Vec3b>(i,j)[0] + image1.at<Vec3b>(i,j)[1] + image1.at<Vec3b>(i,j)[2])/3;
+					out.at<Vec3b>(i,j)[2] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+				}
+
+			}
+		}
+
+	}	
+	// for falsecolor and independent scaling[0]
+	if(strcmp(method[0],x4)==0 && strcmp(scaling[0],y2)==0) {	
+		out = Mat::zeros(max_rows,max_cols,image1.type());
+		//scale image 1 and image 2
+		
+	    split(image1, rgbChannels);
+		normalize(rgbChannels[0],rgbChannels[0],0,255,CV_MINMAX);
+		normalize(rgbChannels[1],rgbChannels[1],0,255,CV_MINMAX);
+		normalize(rgbChannels[2],rgbChannels[2],0,255,CV_MINMAX);
+		merge(rgbChannels,image1);
+		split(image2, rgbChannels);
+		normalize(rgbChannels[0],rgbChannels[0],0,255,CV_MINMAX);
+		normalize(rgbChannels[1],rgbChannels[1],0,255,CV_MINMAX);
+		normalize(rgbChannels[2],rgbChannels[2],0,255,CV_MINMAX);
+		merge(rgbChannels,image2);
+		// image 1 green image2 red
+		for(int i=0;i<image1.rows;i++){
+			for(int j=0;j<image1.cols;j++){
+				out.at<Vec3b>(i,j)[0] = 0;
+				out.at<Vec3b>(i,j)[1] = (image1.at<Vec3b>(i,j)[0] + image1.at<Vec3b>(i,j)[1] + image1.at<Vec3b>(i,j)[2])/3;
+				out.at<Vec3b>(i,j)[2] = 0;
+			}
+		}
+		for(int i=0;i<image2.rows;i++){
+			for(int j=0;j<image2.cols;j++){
+				out.at<Vec3b>(i,j)[0] = 0;
+				out.at<Vec3b>(i,j)[1] = 0;
+				out.at<Vec3b>(i,j)[2] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+			}
+		}
+		for(int i=0;i<min(image1.rows,image2.rows);i++){
+			for(int j=0;j<min(image1.cols,image2.cols);j++){
+				if(image1.at<Vec3b>(i,j) == image2.at<Vec3b>(i,j)){
+					out.at<Vec3b>(i,j)[0] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+					out.at<Vec3b>(i,j)[1] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+					out.at<Vec3b>(i,j)[2] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+				}
+				else{
+					out.at<Vec3b>(i,j)[0] = 0;
+					out.at<Vec3b>(i,j)[1] = (image1.at<Vec3b>(i,j)[0] + image1.at<Vec3b>(i,j)[1] + image1.at<Vec3b>(i,j)[2])/3;
+					out.at<Vec3b>(i,j)[2] = (image2.at<Vec3b>(i,j)[0] + image2.at<Vec3b>(i,j)[1] + image2.at<Vec3b>(i,j)[2])/3;
+				}
+
+			}
+		}
+
+	}	
+
+	// for joint scaling[0]
+	if(strcmp(scaling[0],y3)==0){
+		split(out, rgbChannels);
+		normalize(rgbChannels[0],rgbChannels[0],0,255,CV_MINMAX);
+		normalize(rgbChannels[1],rgbChannels[1],0,255,CV_MINMAX);
+		normalize(rgbChannels[2],rgbChannels[2],0,255,CV_MINMAX);
+		merge(rgbChannels,out);
+	}
+
+	if(image1.channels()==1 && image2.channels()==1){
+		cvtColor(out,out,CV_BGR2GRAY);
+	}
+
+	// out is the return image
+	namedWindow("Output",CV_WINDOW_AUTOSIZE);
+	imshow("Output",out);
+	// waitKey(0);
+	string tempstring = type2str(out.type());
+    char *checker;
+    checker = (char *)malloc(tempstring.size() + 1);
+    memcpy(checker, tempstring.c_str(), tempstring.size() + 1);
+    returnImage(checker,out,1);
+    free(checker); 
+    //Assigning the list as the Output Variable
+    AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
+
+    ReturnArguments(pvApiCtx);
+    return 0;
+  }		
+}	
\ No newline at end of file