title: Scanning a coin and then determining the date from the image
body: <p>I want to write a .NET program that takes an image of a specific coin type (say a US nickle) and then searches the image for the year. Assume the scan is always 300dpi and has a consistent image size cropped to the coin. <strong>What changes is the rotation of the coin.</strong></p>
  
  <p><strong>So how would I determine the date?</strong>
  Should I image match by creating a library of all expected coin images with each year?
  Should I try OCR the date?
  What libraries might be helpful</p>
  
  <p>Thanks in advance for any help or suggestions</p>