Abstract
As a fundamental study on quantifying subjective evaluation by eye movement information, a relationship between eye fixation time and subjective evaluation was discussed. Firstly, a view point measurement system to extract eye fixation in opinion tests with pictures was developed. In the system, linear projection transform and adaptive α-Trimmed mean filters were used to detect eye positions on a picture and reduce noise in view point measurements, respectively. The eye fixation was detected when the change of the eye position in less than 2° was kept for more than 150ms. Secondly, eye fixation and its time were measured when pairs of food pictures were displayed and one picture corresponding to an opinion “Like” or “Dislike” was subjectively selected. Results show the eye fixation time for a picture evaluated as the opinion “Like” or “Dislike” becomes longer than that for the other picture (not evaluated), which indicates a feasibility of detecting a difference of subjective evaluation by the eye fixation time.
