A thresholding method based on two-dimensional Renyi's entropy

Sahoo, Prasanna K.; Arora, Gurdial

Affiliations

¹Department of Mathematics, University of Louisville, Louisville, KY 40292, US

²Department of Mathematics, Xavier University of Louisiana, New Orleans, LA 70125, USA

Abstract and keywords

In this paper, we present a new thresholding technique based on two-dimensional Renyi's entropy. The two-dimensional Renyi's entropy was obtained from the two-dimensional histogram which was determined by using the gray value of the pixels and the local average gray value of the pixels. This new method extends a method due to Sahoo et al. (Pattern Recognition 30 (1997) 71) and includes a previously proposed global thresholding method due to Abutaleb (Pattern Recognition 47 (1989) 22). Further, our method extends a global thresholding method due to Chang et al. (IEEE Trans. Image Process. 4 (1995) 370) to the two-dimensional setting. The effectiveness of the proposed method is demonstrated by using examples from the real-world and synthetic images.

Keywords: Renyi entropy; Shannon entropy; Image thresholding; Maximum entropy sum method; Entropic correlation method; Two-dimensional histogram; Two-dimensional entropic thresholding method

Links

DOI: 10.1016/j.patcog.2003.10.008

WoS: 000221553100005

History

Received: 2003-01-27

Accepted: 2003-1-22

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