title: What is the OpenCV template matching Max Min value range ? Need to be used as a theshold / c++/java
body: <p>I am creating a simple openCV application using template matching where I need to compare find a small image in a big image and return the result as true(if match found) or false( no matches found).</p>
  
  <pre><code>    Imgproc.matchTemplate(largeImage, smallImage, result, matchMethod);
      Core.normalize(result, result, 0, 1, Core.NORM_MINMAX, -1, new Mat());
  
      MinMaxLocResult mmr = Core.minMaxLoc(result);
  
      double minMaxValue = 1;
      if (matchMethod== Imgproc.TM_SQDIFF || matchMethod== Imgproc.TM_SQDIFF_NORMED)
      {
          minMaxValue = mmr.minVal;
          useMinThreshold = true;
      }
      else
      {
          minMaxValue = mmr.maxVal;
      }
  </code></pre>
  
  <p>Now the problem is in taking decision (true/false) using this minMaxValue. I know the above two methods TM_SQDIFF and TM_SQDIFF_NORMED returns low values while the others return high values so I can have 2 different thresholds and compare one of threshold (depending on the template method type).</p>
  
  <p>So it would be great if some one can explain what is the minVal and maxVal range that the MinMaxLocResult returns.</p>
  
  <p>Is it 0 to 1 range?</p>
  
  <p>If yes, for Max type template method value 1 is a perfect match?</p>