Calibration Method of Visual Parameters of See-Through Head-Mounted Display to Adjust Apparent Distance.

Measurement of auditory alleys in a virtual environment and their mathematical models

“…The STHMD, in which the virtual environment can be superimposed on the real environment by a beam splitter, can be calibrated to make the coordinates of the visual space for a virtual environment coincide with those of the visual space for a real environment by the superimposition. A calibration method was developed and applied to the visual parameters of the STHMD to eliminate errors caused by mechanical misalignments in the STHMD [11] and by individual differences between actual and designed location of pupils of eyes, which ensured the coincidence of the apparent distance in a virtual environment with that in the real environment [12]. Using one of the computers, auditory signals were synthesized, output through DSP, and input through headphones (Senheiser HD25SP) to both ears of the subject.…”