APPLICATION OF THE INFORMATION THEORY TO HAND EVALUATION AND PROPOSAL OF THE DESIGN EQUATION OF THE VISUAL AND TACTUAL SENSE VALUES OF PILE FABRICS

Abstract

In this paper, using the technique of information theory, how the information of sight and touch stimuli was changed into the panel's response information by the biological information processing system was discussed when the sensory values of pile fabrics were evaluated by the panel's senses of sight and touch.
The results obtained are as follows;
(1) When the sensory values of pile fabrics were evaluated by the consumers' and specialists' senses of sight and touch, the sight (or touch) information added to the touch (or sight) information was recognized as the sensory values by both groups.
(2) When consumers evaluated the sensory values of pile fabrics using the information of sight and touch stimuli, the ratio of the touch information to the sight and touch information was about 31_??_36% and the ratio of the sight information was about 65_??_71%. On the other hand, the ratio of the touch information was about 46_??_49% and the ratio of the sight information was about 52_??_56% on specialists. In view of these facts, it was found that consumers depended on the sight information more than specialists in evaluating the sensory values of pile fabrics.
(3) Relations among_??__st, _??__t and_??__s, is expressed in the following equation (1).
(1)
where_??__st, _??__t and_??__s are mean preference values evaluated by the senses of sight and touch, the sense of touch, and the sense of sight, and A and B are constants. And there is a good agreement between measured mean preference values and values calculated by Eq. (1).
(4) It was found that the visual and tactual sense values were determined by fitting Eqs. (1)_??_(17) using the physical properties and the three attributes of color perception (hue, value and chroma) of pile fabrics and the obtained data agreed well with the sensory values evaluated by consumers' and specialists' senses of sight and touch.