An Analysis of Off-line and On-line Approaches in Urdu Character Recognition

In this research article a detailed analysis has been proposed for various offline and online character recognition systems for Urdu script from year 2002 to 2012. This analysis is based on the Methodology, Text Type, Font, Recognition Level, Sample and Accuracy Level achieved by each individual Urdu script recognition system. This paper attempts to cover various aspects of offline and online character recognition systems to provide wide exposure to this research topic with special emphasis on Urdu Script. Generally, character recognition is the capability of a computer system to comprehend printed or handwritten text from different sources like documents, books, reports, photographs or directly from digital touch screens. In Offline Character Recognition system, an image is sensed by a scanner having printed text. When using any digital device in real time for example a touch-screen or a digital pen, it is referred to as Online Character Recognition.