Review of OCR Techniques Used in Automatic Mail Sorting of Postal Envelopes

This paper presents a review of various OCR techniques used in the automatic mail sorting process. A complete description on various existing methods for address block extraction and digit recognition that were used in the literature is discussed. The objective of this study is to provide a complete overview about the methods and techniques used by many researchers for automating the mail sorting process in postal service in various countries. The significance of Zip code or Pincode recognition is discussed.