An improvement of diamond encoding using characteristic value positioning and modulus function

Authors:
Jeanne Chen;Chih-Wei Shiu;Mei-Chen Wu
Affiliations:
Department of Computer Science and Information Engineering, National Taichung University of Science and Technology, Taichung 404, Taiwan;Department of Computer Science and Engineering, National Chung-Hsing University, Taichung 402, Taiwan;Department of Information Management, Yu Da University, Miaoli 361, Taiwan
Venue:
Journal of Systems and Software
Year:
2013

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Abstract

The diamond encoding technique controls payload and image quality by a k value. Although a small increase in k can increase payload, it also increases image distortion. In this paper, we proposed an improvement scheme to the diamond encoding technique for reducing image distortion during a k change. Another aim is to increase payload size. A square matrix conversion of the diamond matrix is used to lower the MSE values in high payload when k=3. A lower MSE reduces image distortion. In low payload, that is when k changes from 1 to 2, a one dimension matrix modulus is used to reduce image distortion. Experimental results showed that payload may be increased while image quality is not significantly reduced.