We developed an expressible pupil response inter face using hemispherical displays for enhancing human-robot communication. This interface looks like robot's eyeballs and expresses vivid pupil response by speech input. In particular, the interface can express exaggerated pupil response that human cannot express. In this study, for the basic research of realizing affinitive interaction in human-robot communication, we analyzed the pupil response with affective expression during utterance using a pupil measurement device. On the basis of the analysis result, we developed a speech-driven pupil response system with affective expression using hemispherical displays. This system expresses pupil response with various affective expression by speech input. We carried out an evaluation experiment by using a sensory evaluation with the system acting as the speaker. The result demonstrated that the system with affective expression is effective for enhancing affinitive interaction.
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