A Kansei-based Color Conspicuity Model and Its Application to the Design of Road Signs
Road signs are essential to safety in modern life end their visual design is a key factor to their effectiveness. This paper describes dichromatic color conspicuity based on Kansei modeling. First, we conduct an interactive survey of color conspicuity in which subjects find balanced conspicuity for two figures, one in the middle of the other. The results of the experiment give a measure of equivalent conspicuity for two colors. Next, we develop a model of conspicuity in which the relative area at equivalent balance is the average response from the surveys and this value is drawn on a spline curve. We tested traffic signs for conspicuity based on the model, giving the traffic signs a new quantitative dimension. Our optimal design concept is based on the traffic signs having stronger relative conspicuity for the pictogram of the sign based on the model, and calculated by the relative conspicuity of the two colors in the design. The actual designs shown in this work visually demonstrate the striking power of this model and the difference that such models can make to emotive response.