Prasanna K. Sahoo

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In digital image processing, thresholding is a well-known technique for image segmentat ion. Because of its wide applicability to other areas of the digital image processing, quite a number of thresholding methods have been proposed over the years. In this paper, we present a survey of thresholding techniques and update the earlier survey work by Weszka(More)
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(More)
Ab..tract-The gray-level threshold selection method for im2 e segmen-tation presented here is based on the maximum entropy pri ciple. The optimal threshold value is determined by maximizing the , posteriori entropy subject to certain inequality constraints which are ,Ierived by means of special measures characterizing uniformity and the s 'ape of tbe(More)
Lack of immune competence in the early stages of life leads to severe mortality in larval stages of different fish species including Indian major carp (IMC). Investigation through indirect enzyme linked immunosorbent assay (ELISA) and agglutination test revealed a significant increase in specific serum antibody response in the brood fish of Indian major(More)
Different non-specific immune parameters and their seasonal changes in brood Indian major carp Labeo rohita reared in two major freshwater aquaculture regions of India viz. West Bengal and Orissa were investigated. It was undertaken for 2 consecutive years and included three main seasons of a year such as summer (March-May), rainy (July-September) and(More)
K e y w o r d s H y e r s U l a m stability, Flett mean value theorem, Flett's point. 1. I N T R O D U C T I O N In 1968, Ulam [1] proposed the general problem: "When is it t rue tha t by changing a l i t t le the hypotheses of a theorem one can still assert t ha t the thesis of the theorem remains t rue or approx imate ly t rue?" In 1978, Gruber [2](More)