1 files changed, 145 insertions, 0 deletions
diff --git a/sci_gateway/cpp/opencv_grayconnected.cpp b/sci_gateway/cpp/opencv_grayconnected.cpp
new file mode 100644
index 0000000..32eba4f
--- /dev/null
+++ b/sci_gateway/cpp/opencv_grayconnected.cpp
@@ -0,0 +1,145 @@
+/***************************************************
+Author : Dhruti Shah
+****************************************************
+Usage : return_image = grayconnected(input_image,row,column,tolerance);
+***************************************************/
+
+#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_grayconnected(char *fname, unsigned long fname_len)
+  {
+
+    SciErr sciErr;
+    int intErr = 0;
+    int iRows=0,iCols=0;
+    int *piAddr2  = NULL;
+    int *piAddr3  = NULL;
+    int *piAddr4  = NULL;
+    int *piAddr5  = NULL;
+    int i,j,k;
+    double row, column, tolerance=32;
+
+    //checking input argument
+    CheckInputArgument(pvApiCtx, 3, 4);
+    CheckOutputArgument(pvApiCtx, 1, 1) ;
+
+    Mat image;
+    retrieveImage(image,1);
+
+    //for value of row
+    sciErr = getVarAddressFromPosition(pvApiCtx,2,&piAddr2);
+    if (sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+    intErr = getScalarDouble(pvApiCtx, piAddr2, &row);
+    if(intErr)
+        return intErr;
+
+    //for value of column
+    sciErr = getVarAddressFromPosition(pvApiCtx,3,&piAddr3);
+    if (sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+    intErr = getScalarDouble(pvApiCtx, piAddr3, &column);
+    if(intErr)
+        return intErr;
+
+    if(nbInputArgument(pvApiCtx)==4)
+    {
+        //for value of tolerance
+        sciErr = getVarAddressFromPosition(pvApiCtx,4,&piAddr4);
+        if (sciErr.iErr)
+        {
+            printError(&sciErr, 0);
+            return 0;
+        }
+        intErr = getScalarDouble(pvApiCtx, piAddr4, &tolerance);
+        if(intErr)
+            return intErr;
+    }
+
+
+    if(row<0)
+    {
+        sciprint("Positive Value Required for Row.");
+        return 0;
+    }
+    if(column<0)
+    {
+        sciprint("Positive Value Required for Column.");
+        return 0;
+    }
+    if(tolerance<0)
+    {
+        sciprint("Positive Value Required for tolerance.");
+        return 0;
+    }
+    
+
+    Mat gray_image;
+    cvtColor( image, gray_image, CV_BGR2GRAY );
+    Mat temp_image = Mat::zeros( image.size(), image.type() );
+    Mat image_to_display = Mat::zeros( image.size(), image.type() );
+
+    int value = gray_image.at<uchar>(row,column);
+
+    for(int i=0;i<image.cols;i++)
+    {
+        for(int j=0;j<image.rows;j++)
+        {
+            int value1 = gray_image.at<uchar>(i,j);
+            if(value1>=value-tolerance && value1<=tolerance+value)
+                temp_image.at<uchar>(i,j)=255;
+            else
+                temp_image.at<uchar>(i,j)=0;
+        }
+    }
+
+    Mat labelled_image(image.size(), image.type() );
+    int nlabels = connectedComponents(temp_image , labelled_image );
+    int label = labelled_image.at<uchar>(row,column);
+
+    for(int i=0;i<image.cols;i++)
+    {
+        for(int j=0;j<image.rows;j++)
+        {
+            if(labelled_image.at<uchar>(i,j)==label)
+                image_to_display.at<uchar>(i,j)=255;
+        }
+    }
+
+    //returning image
+    string tempstring = type2str(image_to_display.type());
+    char *checker;
+    checker = (char *)malloc(tempstring.size() + 1);
+    memcpy(checker, tempstring.c_str(), tempstring.size() + 1);
+    returnImage(checker,image_to_display,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;
+
+  }
+/* ==================================================================== */
+}