Information Volumes of Radiographs Modified by Sharpness and Visual Effects

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概要

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• Information volume due to contrast in an image (macroscopic characteristics) defied in a previous paper is first modified by sharpness (microscopic characteristics). Instead of normal contrasts, contrasts in images of a slit with a fixed width, as well as frequency responses at a fixed spatial frequency, were utilized. Because of unsharpness, sharpness information is usually less than contrast information. This situation, however, reverses when the edge effect is noticeable. Secondly, information volume is modified by minimum perceptible contrasts. It also takes a maximum with proper quality and quantity of radiation.

• 社団法人応用物理学会の論文
• 1965-10-15

著者

• Kanamori Hitoshi

  Radiation Apparatus Division Shimadzu Seisakusho Ltd.

関連論文

• Information Volumes of Radiographs Modified by Sharpness and Visual Effects
• A New Definition of Information Volumes on Radiographs from Density-to-Thickness Curves
• The Determination of the Optimum Density and the Density-Range of Radiographs from Visual Effects

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