title: How to write a simple image recognition
body: <p>I have a problem very similar but very much simple than <a href="https://stackoverflow.com/questions/6999920/looking-for-an-image-comparison-pattern-recognition-library">this</a>.</p>
  
  <p>To begin with I have a small image: <img src="https://i.stack.imgur.com/8tu8h.png" alt="enter image description here"></p>
  
  <p>Then I take a screenshot and I want to detect if my small house is in the screenshot.</p>
  
  <p>The problem is that my house can be different in size and slightly different in color.</p>
  
  <p>I've found so far the OpenCV library but it seem quite oversized for my need.</p>
  
  <p>Do you know any simpler library to achieve this task?</p>
  
  <p>Tx </p>
  
  <p>Edit: I've <a href="https://stackoverflow.com/questions/4118770/opencv-haar-training-for-static-image">found this</a> about SURF algorithm</p>