3d vision

Gamma-corrected stimuli were generated by using a DELL computer running MATLAB (The Mathworks Corp., Natick, MA, USA) and PsychToolbox subroutines (Brainard, 1997 (link); Denis, 1997 (link)), and it was presented on an ASUS VG278 3D monitor with a resolution of 1,920 × 1,080 pixels at a refresh rate of 80 Hz. Each pixel subtended 0.46 min of arc at a viewing distance of 2.35 m. Stereoscopic images were displayed dichoptically through liquid crystal shutter glasses (NVIDIA 3D VISION) that were synchronized to the VG 278 3D monitor. The mean luminance of the stimulus and background was 43.86 and 0.26 cd/m², respectively. A chin/forehead rest was used to minimize head movement during the experiment.

The VIEWPixx 3D (VPixx Technologies, Montreal, Canada) is an LCD panel with an LED backlight. It is a high-performance system intended to replace CRT monitors in vision-science applications. When paired with an active-shutter-goggle system (Nvidia 3D Vision, Nvidia, Santa Clara, CA), it is capable of stereo presentation at 120 Hz. This system was driven by a 2013 Mac Pro (Apple, Cupertino, CA), with code written in MATLAB using Psychtoolbox 3.0.11.