The samples were updated through CommandLineParser class

samples/cpp/bgfg_segm.cpp

@@ -1,32 +1,40 @@
+#include "opencv2/core/core.hpp"
 #include "opencv2/video/background_segm.hpp"
 #include "opencv2/highgui/highgui.hpp"
 #include <stdio.h>
 
 using namespace cv;
+using namespace std;
 
 void help()
 {
  printf("\nDo background segmentation, especially demonstrating the use of cvUpdateBGStatModel().\n"
-"Learns the background at the start and then segments.\n"
-"Learning is togged by the space key. Will read from file or camera\n"
-"Call:\n"
-"./  bgfg_segm [file name -- if no name, read from camera]\n\n");
+"       Learns the background at the start and then segments.\n"
+"       Learning is togged by the space key. Will read from file or camera\n"
+"Usage: \n"
+"       ./bgfg_segm [--file_name]=<input file, camera as defautl>\n\n");
 }
 
 //this is a sample for foreground detection functions
-int main(int argc, char** argv)
+int main(int argc, const char** argv)
 {
+    help();
+
+    CommandLineParser parser(argc, argv);
+
+    string fileName = parser.get<string>("file_name", "0");
     VideoCapture cap;
     bool update_bg_model = true;
 
-    if( argc < 2 )
+
+    if(fileName == "0" )
         cap.open(0);
     else
-        cap.open(argv[1]);
-    help();
-    
+        cap.open(fileName.c_str());
+
     if( !cap.isOpened() )
     {
+        help();
         printf("can not open camera or video file\n");
         return -1;
     }