人の視覚特性の画像評価への応用 : 観察系を含めた心理物理的評価の導入

概要

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During radiographic imaging, it is very important that the results of physical evaluation correspond with that of the subjective evaluation. However the gradient curve, MTF and Wiener spectrum as physical indices do not correspondence to results of subjective evaluation. Utlizing the minimum perceptble density difference (ΔDmin), the human psychological effect is introduced into conventional psysical data. Our psychophysical data, by using ΔDmin, represent human eyes response to brightness, color tones and physical information quantity of screen/film systems. So the values of psychophysical data are in good agreement with the human vision sense when we observe X-ray films illuminated by viewing box. Therefore, it is very important when observing, we should include characteristics of human vision and the viewing box into its physical quantity.
社団法人日本放射線技術学会の論文
1994-04-01