Preprocessing Techniques in Character Recognition
Yasser M. Alginahi · Sciyo eBooks · 2010
In this chapter, preprocessing techniques used in document images as an initial step in character recognition systems were presented. Future research aims at new applications such as online character recognition used in mobile devices, extraction of text from video images, extraction of information from security documents and processing of historical documents. The objective of such research is to guarantee the accuracy and security of information extraction in real time applications. Even though many methods and techniques have been developed for preprocessing there are still problems that are not solved completely and more investigations need to be carried out in order to provide solutions. Most of preprocessing techniques are application-specific and not all preprocessing techniques have to be applied to all applications. Each application may require different preprocessing techniques depending on the different factors that may affect the quality of its images, such as those introduced during the image acquisition stage. Image