Patent ID: 8830164

Claim:
A user interface device configured to estimate a user's degree of interest in a plurality of objects displayed on a screen, for performing an input process on the basis of the user's degree of interest, the user interface device comprising: a gaze direction detection unit configured to detect a gaze direction of the user; a gaze duration calculation unit configured to calculate a gaze duration during which the gaze direction has remained on each of the plurality of objects; an eye-attracting force calculation unit configured to calculate an eye-attracting force of each of the plurality of objects, the eye-attracting force being a value indicating how strongly the object visually draws the user's attention; and a degree of interest estimation unit configured to estimate the user's degree of interest in each of the plurality of objects such that the longer the gaze duration is the higher the degree of interest becomes, and the smaller the eye-attracting force is the higher the degree of interest becomes.