The Fundamental Research on the Improvement of Measurement Range in 3D Image Measurement of Human Leg using Mirrors

Abstract

In this study, we report a method for the measurement of an entire periphery using stereo images and mirrors. Several methods have been proposed to measure the entire periphery, such as surrounding the target with cameras, rotating the target on a rotating table, and reflecting the target using mirrors. The advantages of using mirrors are synchronizing measurement, saving space, and low cost. In the past, we reported a method for measuring the shape of a leg using mirrors. The combination of mirrors and stereo images was unique. However, we confirmed that there is a measurement deficit around the edge of the target. This deficit occurs because of the short distance between the mirrors and the target at the limited area. Therefore, we aimed to improve our technique using additional mirror reflections. We expanded the measurement range using the image reflected twice on the mirrors. As a result, we succeeded in improving the measurement deficit.