Assessment of Radiographic Granularity by a Single Number. : II. Interpretation of Conditional Entropy H_x(y) in the Bivariate Entropy Method
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概要
- 論文の詳細を見る
The meaning of conditional entropy H_x(y) in the bivariate entropy method is interpreted theoretically. It is shown that H_x(y) is related to the geometric mean of individual standard deviations of the output distributions when these are Gaussian. This interpretation is used to assess the radiographic granularity by a single number in terms of entropy. It is indicated that H_x(y) in this application is related to the geometric mean of the RMS granularity and represents entropy granularity as defined in this paper. The results of the above analysis and application show that H_x(y) in the bivariate entropy method is a significant measure of the average of the scatter in measured data.
- 社団法人応用物理学会の論文
- 1982-08-20
著者
-
Uchida Suguru
Department Of Electrical Engineering Faculty Of Engineering Gifu University
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Fujita Hiroshi
Department Of Applied Physics Faculty Of Engineering University Of Tokyo
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