Estimation of Finger Pressure Direction by Image Analysis of Fingernail for Interactive Surface

Abstract

In this paper, we propose a finger contact and force direction simultaneous recognition method based on image analysis, which can be applied to any kind of real surfaces. In this method, the fingertip contact is recognized by using the property that the color pattern of its nail changes from pink to white when it touches a surface. This method does not disturb user's tactile feeling and not limit the range where a contact recognition is possible.