1 files changed, 100 insertions, 0 deletions
diff --git a/sci_gateway1/cpp/opencv_imcontrast.cpp b/sci_gateway1/cpp/opencv_imcontrast.cpp
new file mode 100644
index 0000000..216228f
--- /dev/null
+++ b/sci_gateway1/cpp/opencv_imcontrast.cpp
@@ -0,0 +1,100 @@
+/********************************************************
+Author: Sukul Bagai
+********************************************************/
+
+#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 "../common.h"
+
+  int opencv_imcontrast(char *fname, unsigned long fname_len)
+  {
+
+    SciErr sciErr;
+    int intErr;
+    int iRows=0,iCols=0;
+    int *piAddr = NULL;
+    int *piAddrNew = NULL;
+    int *piAddr2  = NULL;
+    int *piAddr3  = NULL;
+    int i,j,k;
+    double alpha, beta;
+
+    //checking input argument
+    CheckInputArgument(pvApiCtx, 3, 3);
+    CheckOutputArgument(pvApiCtx, 1, 1) ;
+
+
+    Mat image;
+    retrieveImage(image, 1); 
+
+    //for value of alpha
+    sciErr = getVarAddressFromPosition(pvApiCtx,2,&piAddr2);
+    if (sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+    intErr = getScalarDouble(pvApiCtx, piAddr2, &alpha);
+    if(intErr)
+    {
+        return intErr;
+    }   
+
+    //for value of beta
+    sciErr = getVarAddressFromPosition(pvApiCtx,3,&piAddr3);
+    if (sciErr.iErr)
+    {
+        printError(&sciErr, 0);
+        return 0;
+    }
+    intErr = getScalarDouble(pvApiCtx, piAddr3, &beta);
+    if(intErr)
+    {
+        return intErr;
+    }   
+
+
+    //we copy the original image into the new_image, and change values of each pixel using value of alpha and beta given by the user
+    Mat new_image = Mat::zeros( image.size(), image.type() );
+
+    //changes the attributes of each individual pixel
+    for( int y = 0; y < image.rows; y++ )
+    { 
+        for( int x = 0; x < image.cols; x++ )
+        { 
+            for( int c = 0; c < 3; c++ )
+            {
+                new_image.at<Vec3b>(y,x)[c] =
+                saturate_cast<uchar>( alpha*( image.at<Vec3b>(y,x)[c] ) + beta );
+            }
+        }
+    }
+
+    
+    string tempstring = type2str(new_image.type());
+    char *checker;
+    checker = (char *)malloc(tempstring.size() + 1);
+    memcpy(checker, tempstring.c_str(), tempstring.size() + 1);
+    returnImage(checker,new_image,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;
+
+}
+/* ==================================================================== */
+}