黒色織物の明るさ感評価を代替する計量法ならびに特徴化法の提案

摘要

Property of fabric appearance such as elegant, high-class, beautiful is required on producing dyed black color fabric for formal wear. From our previous study, the hierarcnical model representing the quality check process of fabric appearance was proposed through evaluation of dyed black color fabrics by non-experts on textiles. Ana it was found that the evaluation of fabric appearance is strongly governed by that of macroscopic or microscopic brightness sensation. Hence, this study aimed to predict the score of the macroscopic or the microscopic brightness sensation by optical measurement and its characterization of dyed black color fabric. The spatial reflection curve on 12 kind of sample was measured with original gonio-photometric system. And several parameters (e.g. TI，S, and I) indicating the character of the spatial reflection curve was defined. Then the score of the macroscopic or the microscopic brightness sensation was predicted by equations which denoted with some of above parameters. Through these investigation, the methodology of photometry and characterization on brightness sensation of dyed black color fabric for objective assessment of fabric appearance was proposed.%本研究では，巨視範囲，または微視範囲という異なる領域 で知覚される黒色織物の明るさ感評価を代替できる計量法な らびに特徴化法の提案を目的に，簡易な光学系計測システム を構築し，これらの光学的要因を検討した. その結果，巨視的な明るさ感は，受光角0°における平均 輝度L_0および繊維素材固有の屈折率や繊維素材の形態に起 因する空間反射曲線の台形積分値TIの両変数によって，また. 微視的な明るさ感は，受光角0°における平均輝度L_0および 空間反射曲線の近似式の傾きSの両変数によって，それぞれ 表されることを明らかにした.