title: Finding the position of an object in an image
body: <p>My goal is to find the location of specific images on other images, using python. Take this example:</p>
  
  <p><img src="https://i.stack.imgur.com/zGjE6.png" alt="enter image description here">
  <img src="https://i.stack.imgur.com/RZc1e.png" alt="enter image description here"></p>
  
  <p>I want to find the location of the walnut in the image. The image of the walnut is known, so I think there is no need for any kind of advanced pattern matching or machine learning to tell if something is a walnut or not. </p>
  
  <p>How would I go about finding the walnut in the image? Would a strategy along these lines work: </p>
  
  <ul>
  <li>read images with with PIL</li>
  <li>transform them into Numpy arrays</li>
  <li>use Scipy's image filters (what filters?)</li>
  </ul>
  
  <p>Thanks!</p>