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Indexed by:会议论文

Date of Publication:2016-06-08

Included Journals:EI、CPCI-S、Scopus

Volume:2016-November

Page Number:880-884

Key Words:refraction; machine vision; measurement

Abstract:In this paper, a monocular vision measurement method based on refraction of light is proposed. A flat glass board is placed between the target and the camera, which causes light refraction during the measurement process. By analyzing images taken before and after light refraction, the 3D coordinates of the target can be obtained. Using this method, only the thickness and refractive index of the glass board is required to solve the problem of 3D measurement even if the glass board is placed at any angle. Besides, a novel method for calculating the normal vector of the glass board based on images before and after light refraction is proposed, which makes it easier to complete 3D measurement with a single camera. The measuring method proposed in this paper is simple, and the equipment required is low-costing. The 3D information of a target can be measured without requirement for a priori knowledge of feature points on the target or the location information of the glass board. Finally experiments are conducted in the laboratory, and results show that excellent accuracy can be obtained with proposed method.