Support System of Grasping Action for Impaired Vision Using QR Code

Abstract

There are a lot of people who have impaired vision. It is difficult for weak-eyed people to sense a distance because of their blurry vision. Therefore they often feel difficulties in grasping objects. It is useful to develop a system presenting the distance between a hand and an object for low vision people. In this paper, we propose a method to estimate the distance between a camera and an object surface on which a QR code is pasted. In this system, we assume the camera is worn on hand and the QR code with information embedded is pasted on the surface of object. The distance between the camera and the QR code which is attached on the object is estimated by comparing the real size of QR code with the size of QR code in the camera. In the experiment section, we performed two kinds of experiments to gauge an accuracy of the estimated distance and validate usability of the system by examinees. The effectiveness of proposed system is verified through these experiments.