It works

.gitignore

@@ -0,0 +1,11 @@
+CMakeLists.txt.user
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Testing
+Makefile
+cmake_install.cmake
+install_manifest.txt
+compile_commands.json
+CTestTestfile.cmake
+_deps

checkvideo.cpp

@@ -6,7 +6,7 @@ using namespace std;
 using namespace cv;
 
 uchar **matToArray( cv::Mat array);
-
+int diffVec(Vec3b & first, Vec3b & second);
 
 int main(int argc, char* argv[])
 {
@@ -17,10 +17,6 @@ int main(int argc, char* argv[])
 
     int childProcesses = procRank -1;
 
-    //2D array - used to store ther Mat Object values
-    uchar **pixels = NULL;
-    uchar **oldPixels = NULL;
-
     // Create a VideoCapture object and open the input file
     // If the input is the web camera, pass 0 instead of the video file name
     VideoCapture cap("teapot.mp4");
@@ -30,8 +26,8 @@ int main(int argc, char* argv[])
         cout << "Error opening video stream or file" << endl;
         return -1;
     }
+
     Mat oldFrame;
-    cout << oldFrame << endl;
     while(1){
 
         Mat frame;
@@ -47,16 +43,18 @@ int main(int argc, char* argv[])
             continue;
         }
 
-        cv::Mat newMat = cv::Mat(frame.rows, frame.cols, frame.type());
+        cv::Mat newMat = cv::Mat(frame.rows, frame.cols, frame.type()); // frame.clone();
-
-        oldPixels = matToArray(oldFrame);
-        pixels = matToArray(frame);
 
         for(int i=0;i<frame.rows;i++){
             for(int j=0;j<frame.cols;j++){
-                int diff = std::abs(pixels[i][j] - oldPixels[i][j]);
+                auto oldPxl = oldFrame.at<Vec3b>(i, j);
+                auto currPxl = frame.at<Vec3b>(i, j);
 
-                if(diff > 10) {
+                // Summiert die Vekotren nach der euklidischen Norm (Von OpenCV)
+                int diff = norm(oldPxl - currPxl);
+
+
+                if(diff > 20) {
                     Vec3b & color = newMat.at<Vec3b>(i,j);
 
                     // ... do something to the color ....
@@ -77,12 +75,11 @@ int main(int argc, char* argv[])
 
         oldFrame = frame;
 
-        // Display the resulting frame
+        imshow( "Live", frame );
-        imshow( "Frame", newMat );
+        imshow( "MotionDetection", newMat );
-        imshow( "Hans", frame );
 
         // Press  ESC on keyboard to exit
-        char c=(char)waitKey(25);
+        char c=(char)waitKey(10);
         if(c==27)
             break;
     }
@@ -99,19 +96,4 @@ int main(int argc, char* argv[])
     MPI_Finalize();
 
     return 0;
-}
-
-uchar **matToArray( cv::Mat array)
-{
-
-    uchar **pixels = new uchar *[array.rows];
-
-    for (int i = 0; i < array.rows; i++)
-    {
-        //IMPORTANT!! Channels are BGR
-        pixels[i] = new uchar[array.cols * array.channels()];
-        pixels[i] = array.ptr<uchar>(i);
-    }
-
-    return pixels;
 }