Research on Calibration of Optical See-Through Head-Mounted Display

Abstract

In order to successfully apply augmented reality technology and provide users with immersive 3D experience of augmented reality, it is necessary to calibrate the optical see-through head-mounted display (OST HMD) of augmented reality equipment. With the help of the video tracking system, a new display calibration method was proposed, in which the data of the video tracker were taken as input and the 3d coordinates of the visual virtual model were taken as output to find the projection transformation matrix between the 3d coordinates of the virtual space and the 3d coordinates of the real space. In addition, in order to obtain the video tracker data conveniently, the 3d calibration target with checkerboard was designed. The display calibration experiment was carried out on Microsoft Hololens platform. The experimental results show that the displacement error of the reprojection of the virtual object is 2.7cm within the active range of 80cm*80cm*100cm of the tracker.