ISSN : 1796-217X
Volume : 3    Issue : 6    Date : June 2008

Thresholding Images of Historical Documents Using a Tsallis-Entropy Based Algorithm
Carlos A.B.Mello and Luciana A.Schuler
Page(s): 29-36
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In this paper we present an algorithm for thresholding images of historical documents. The main
objective is to generate high quality monochromatic images in order to make them easily
accessible through the Internet. Our new algorithm is based on two definitions of entropy: Shannon’
s classical concept and a variation called Tsallis entropy. For historical documents, our method
proved to be more efficient than several known thresholding algorithms by several measures.

Index Terms
Image processing, Document Processing, Historical documents, thresholding, entropy