Challenges in Recognition of Online and Off-line Compound Handwritten Characters: A Review

The recognition of character is the process which enables a computer to recognize handwritten and printed characters such as numbers, letters in a document as image and convert into digital, and machine-readable form that the computer can use. The huge collections of ancient script of written and printed documents are required to be preserved in an electronic file. The main purpose of this study is to recognize descendant scripts of Devanagari such as Pali, Marathi, and Hindi to recover the ancient damaged scripts and valuable documents for further research in related literature. In this article, we analyze different handwritten characters recognition done on non-Indic as well as Indic scripts; the evaluation of handwritten character recognition (HCR) tools and techniques are also presented.