Add template match with mask.

Signed-off-by: Yan Wang <yan.wang@linux.intel.com>

samples/cpp/mask_tmpl.cpp

@@ -0,0 +1,72 @@
+#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 <image_name> <template_name> <mask_name>, Default is ../data/lena_tmpl.jpg\n"
+            << endl;
+}
+
+int main( int argc, const char** argv )
+{
+    const char* filename = argc == 4 ? argv[1] : "../data/lena_tmpl.jpg";
+    const char* tmplname = argc == 4 ? argv[2] : "../data/tmpl.png";
+    const char* maskname = argc == 4 ? argv[3] : "../data/mask.png";
+
+    Mat img = imread(filename);
+    Mat tmpl = imread(tmplname);
+    Mat mask = imread(maskname);
+    Mat res;
+
+    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;
+    matchTemplate(img, tmpl, res, method, mask);
+
+    double minVal, maxVal;
+    Point minLoc, maxLoc;
+    Rect rect;
+    minMaxLoc(res, &minVal, &maxVal, &minLoc, &maxLoc);
+
+    if(method == CV_TM_SQDIFF || method == CV_TM_SQDIFF_NORMED)
+        rect = Rect(minLoc, tmpl.size());
+    else
+        rect = Rect(maxLoc, tmpl.size());
+
+    rectangle(img, rect, Scalar(0, 255, 0), 2);
+
+    imshow("detected template", img);
+    waitKey();
+
+    return 0;
+}