updates documentation and samples

samples/cpp/mask_tmpl.cpp

@@ -1,29 +1,20 @@
 #include "opencv2/imgproc.hpp"
 #include "opencv2/highgui.hpp"
-
-#include <cctype>
 #include <iostream>
-#include <iterator>
-#include <stdio.h>
 
 using namespace std;
 using namespace cv;
 
-static void help()
-{
-    cout << "\nThis program demonstrates template match with mask.\n"
-            "Usage:\n"
-            "./mask_tmpl -i=<image_name> -t=<template_name> -m=<mask_name>, Default is ../data/lena_tmpl.jpg\n"
-            << endl;
-}
-
 int main( int argc, const char** argv )
 {
-    help();
-    cv::CommandLineParser parser(argc, argv,
-        "{ i | ../data/lena_tmpl.jpg | }"
-        "{ t | ../data/tmpl.png | }"
-        "{ m | ../data/mask.png | }");
+    CommandLineParser parser(argc, argv,
+        "{ i | ../data/lena_tmpl.jpg |image name }"
+        "{ t | ../data/tmpl.png |template name }"
+        "{ m | ../data/mask.png |mask name }"
+        "{ cm| 3 |comparison method }");
+
+    cout << "This program demonstrates the use of template matching with mask.\n\n";
+    parser.printMessage();
 
     string filename = parser.get<string>("i");
     string tmplname = parser.get<string>("t");
@@ -35,27 +26,23 @@ int main( int argc, const char** argv )
 
     if(img.empty())
     {
-        help();
         cout << "can not open " << filename << endl;
         return -1;
     }
 
     if(tmpl.empty())
     {
-        help();
         cout << "can not open " << tmplname << endl;
         return -1;
     }
 
     if(mask.empty())
     {
-        help();
         cout << "can not open " << maskname << endl;
         return -1;
     }
 
-    //int method = CV_TM_SQDIFF;
-    int method = CV_TM_CCORR_NORMED;
+    int method = parser.get<int>("cm"); // default 3 (CV_TM_CCORR_NORMED)
     matchTemplate(img, tmpl, res, method, mask);
 
     double minVal, maxVal;