The Efficient Range of Velocities for Inducing Depth Perception by Motion Parallax

Abstract

The range of velocities over which depth perception can be simulated by motion parallax, was studied experimentally. Perception of apparent depth was induced using method of simulated motion parallax. In the condition of ‘observer parallax,’ the range of angular velocity over which apparent depth accompanied by motion was perceived was 0.0048 to 0.048 rad/sec., while velocities for which robust perception of apparent depth was obtained were restricted to the range 0.0010 to 0.0024 rad/sec., and no perceived reversals of depth occurred over this range. No distinct range for robust perception of apparent depth could be found in the condition of ‘stimulus parallax.’ In the case of velocity ratios of 1:1.1 and 1:1.3, the velocity that produced the most robust perception of apparent depth was 0.0024 rad/sec., and inhibition of perceived depth reversals occurred at 0.0010 rad/sec. Under conditions of opposing relative motion, the velocity range over which robust perception of apparent depth was observed was 0.0005 to 0.0010 rad/sec., slightly lower than when both motions were in the same direction.