Template matching with mutiple templates

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Hi @beny2111! If you want to compare multiple Template Images in a Scene Image you have to follow the following steps.

1. Create a Vector of Mat Containing All Template Images
2. Pass the Template Images one by one to the Template matching function to find the Template Object in the Scene.
3. Get the Co-Ordinates of each Template object & Draw it in the Scene Image. Here is the Code for doing so.

#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>
#include <stdio.h>

using namespace std;
using namespace cv;

bool FindTemplate(Mat Img_Scene_Bgr,Mat Img_Template_Bgr,Point &Point_TemplateLocation) 
{
    // `Img_Scene_Bgr` and `Img_Template_Bgr` are the reference and template image
    cv::Mat Img_Result_Float(Img_Scene_Bgr.rows-Img_Template_Bgr.rows+1, Img_Scene_Bgr.cols-Img_Template_Bgr.cols+1, CV_32FC1);
    cv::matchTemplate(Img_Template_Bgr, Img_Scene_Bgr, Img_Result_Float, CV_TM_CCOEFF_NORMED);
    normalize( Img_Result_Float, Img_Result_Float, 0, 1, NORM_MINMAX, -1, Mat() );

    double minval, maxval, threshold = 0.7;
    cv::Point minloc, maxloc;
    cv::minMaxLoc(Img_Result_Float, &minval, &maxval, &minloc, &maxloc);

    if (maxval >= threshold) 
    {
        Point_TemplateLocation= maxloc;
        return true;
    }
    else
    {
        return false;
    }
}

int main( int argc, char** argv )
{
  Mat Img_Scene; 
  Mat Img_Template_1; 
  Mat Img_Template_2; 
  Mat Img_Result;
  char* image_window = "Source Image";
  char* result_window = "Result window";
  /// Load image and template
  Img_Scene = imread("SceneImage.png", 1 );
  Img_Template_1 = imread( "Templ1.png", 1 );
  Img_Template_2 = imread( "Templ2.png", 1 );

  if(Img_Scene.data== NULL||Img_Template_1.data==NULL||Img_Template_2.data==NULL)
  {
      cout<<"Image Not Found";
      return 0;
  }

  Img_Result= Img_Scene.clone();
  Vector<Mat> List_Template_Img;
  List_Template_Img.push_back(Img_Template_1);//Otherwise Get some folder & add the Files in it
  List_Template_Img.push_back(Img_Template_2);

  Point  Point_TemplateLocation;
  for (int i = 0; i < List_Template_Img.size(); i++)
  {
      if(!FindTemplate(Img_Scene,List_Template_Img[i],Point_TemplateLocation))
      {
          cout<<"No Match Found";
      }
      /// Show me what you got
      rectangle( Img_Result, Point_TemplateLocation, Point( Point_TemplateLocation.x + Img_Template_1.cols , Point_TemplateLocation.y + Img_Template_1.rows ), Scalar(0,0,255), 2, 8, 0 );
      putText( Img_Result, format("Object %d ",i),Point( Point_TemplateLocation.x + Img_Template_1.cols/4 , Point_TemplateLocation.y + Img_Template_1.rows/2 ),1,1,Scalar(255,0,0),1,-1);
  }
  /// Create windows
  namedWindow( image_window, CV_WINDOW_AUTOSIZE );
  namedWindow( result_window, CV_WINDOW_AUTOSIZE );

  imshow( image_window, Img_Template_1);
  imshow( image_window, Img_Template_2);
  imshow( result_window, Img_Result );

  waitKey(0);
  return 0;
}