Adding example 13-03 with the image data

Author: Prasanna Krishnasamy

CMakeLists.txt

@@ -38,6 +38,7 @@ add_executable( example_12-01 example_12-01.cpp )
 add_executable( example_12-02 example_12-02.cpp )
 add_executable( example_13-01 example_13-01.cpp )
 add_executable( example_13-02 example_13-02.cpp )
+add_executable( example_13-03 example_13-03.cpp )
 add_executable( example_16-01 example_16-01.cpp )
 
 target_link_libraries( example_02-01 ${OpenCV_LIBS} )
@@ -71,6 +72,7 @@ target_link_libraries( example_12-01 ${OpenCV_LIBS} )
 target_link_libraries( example_12-02 ${OpenCV_LIBS} )
 target_link_libraries( example_13-01 ${OpenCV_LIBS} )
 target_link_libraries( example_13-02 ${OpenCV_LIBS} )
+target_link_libraries( example_13-03 ${OpenCV_LIBS} )
 target_link_libraries( example_16-01 ${OpenCV_LIBS} )
 
 

example_13-03.cpp

@@ -0,0 +1,70 @@
+// Example 13-3. Template matching
+
+#include <opencv2/opencv.hpp>
+#include <iostream>
+
+using namespace std;
+
+void help( char** argv ){
+  cout << "\n"
+  <<"Example of using matchTemplate(). The call is:\n"
+  <<"\n"
+  <<argv[0] <<" template image_to_be_searched\n"
+  <<"\n"
+  <<" This routine will search using all methods:\n"
+  <<" cv::TM_SQDIFF 0\n"
+  <<" cv::TM_SQDIFF_NORMED 1\n"
+  <<" cv::TM_CCORR 2\n"
+  <<" cv::TM_CCORR_NORMED 3\n"
+  <<" cv::TM_CCOEFF 4\n"
+  <<" cv::TM_CCOEFF_NORMED 5\n"
+  <<"\n";
+}
+
+// Display the results of the matches
+//
+int main( int argc, char** argv ) {
+
+  if( argc != 3) {
+    help( argv );
+    return -1;
+  }
+
+  cv::Mat src, templ, ftmp[6];   // ftmp is what to display on
+
+  // Read in the template to be used for matching:
+  //
+  if((templ=cv::imread(argv[1], 1)).empty()) {
+    cout << "Error on reading template " << argv[1] << endl;
+    help( argv );return -1;
+  }
+
+  // Read in the source image to be searched:
+  //
+  if((src=cv::imread(argv[2], 1)).empty()) {
+    cout << "Error on reading src image " << argv[2] << endl;
+    help( argv );return -1;
+  }
+
+  // Do the matching of the template with the image
+  for(int i=0; i<6; ++i){
+    cv::matchTemplate( src, templ, ftmp[i], i);
+    cv::normalize(ftmp[i],ftmp[i],1,0,cv::NORM_MINMAX);
+  }
+
+  // Display
+  //
+  cv::imshow( "Template", templ );
+  cv::imshow( "Image", src );
+  cv::imshow("SQDIFF", ftmp[0] );
+  cv::imshow("SQDIFF_NORMED", ftmp[1] );
+  cv::imshow("CCORR", ftmp[2] );
+  cv::imshow("CCORR_NORMED", ftmp[3] );
+  cv::imshow("CCOEFF", ftmp[4] );
+  cv::imshow("CCOEFF_NORMED", ftmp[5] );
+
+  // Let user view results:
+  //
+  cv::waitKey(0);
+}
+