2006 Volume 18 Issue 4 Pages 571-585
This paper presents a method for evaluating subjective visual perception. The subjectively equivalent size between a circle and a square is evaluated by this method. In this method, the data of subjective visual perception are weighted, because they are vague, and, if there is a contradiction among these data, the weights are decreased. Using these weighted data, an individual's perception is expressed by a membership function. The typical perception of many people is obtained as a fuzzy set by aggregating these individuals' membership functions. This method does not require strong assumptions for the data and is able to show a lot of information of the subjective visual perception, comparing with statistical approach. Human interfaces, nowadays, are demanded to provide subjective satisfaction for users and hence this method is effective and practical.
