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九州産業大学芸術学部研究報告(Kyushu Sangyo University Research Reports of the Faculty of Arts(vol.1-vol.37)) >
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Please use this identifier to cite or link to this item: http://hdl.handle.net/11178/6834

Title: 網印刷物の光沢の検討 ( 1 ) : 網画像の微視的解析
Other Titles: Studies of Quality of Half Tone Reproduction ( 1 ) : Microanalysis of Printed Matter
Authors: 内藤, 郁夫
Naito, Ikuo
ナイトウ, イクオ
九州産業大学芸術学部写真学科
Issue Date: 1992
Publisher: 九州産業大学芸術学会
Abstract: A reflectance of half-tone printed matter decreased with increasing wave number measured. The measurement by an image processing apparatus indicates that the reflectance decreased continuously around the dot edge. The width of the reflectance change was determind to be 32μm. By the effect of the dot edge, the dot area was changed in the monitoring threshold value, the wavelength, screen ruling, dot percentage, etc.. On the basies of thies results, an equation for the evaluation reflection density was proposed on the hypothesis of a middle tone area around the dot; R=(1-a)(10)^<-dp>+a(10)^<-ds>-b((10)^<-dp/2>-(10)^<-ds/2>)^2 where b is the middle tone area. The width of middle tone area was also determind. The error limit of the equation was within 0.4%.
URI: http://hdl.handle.net/11178/6834
Appears in Collections:第23巻

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