title: How can I Display output image with difference size of window? by using cv::Mat
body: <p>According to <a href="https://stackoverflow.com/questions/12102282/how-can-i-display-output-image-with-difference-size-of-window">How can I display output image with difference size of window?</a></p>
  
  <p>I would like to display an image on window using OpenCV function. However, anytime that I tried to display image will be fit to the size of display.</p>
  
  <p>If I would like to display an image with difference size of window (for example. window size 1280x960px, and an image is 600x600px at offset coordinate 100x100px) How can I make them?</p>
  
  <p>However, according to previous question I would like to use cv::Mat (C++ API) How cam I create them? </p>
  
  <p>Thank you for your help.</p>