Stereo/motion cues in pre-attentive vision processing - some experiments with random-dot stereographic image sequences.

Demonstrations are described which present evidence regarding the interaction of the motion, depth, and occlusion cues in low-level vision processing. The result of the demonstrations seem to indicate that the processing of stereo and motion information is not a simple sequential series of processes, but that stereo and motion are separate processes that interact with each other, and whose results are integrated into a final interpretation. One demonstration clearly indicates that motion perception can be aided by stereo information, while another demonstration clearly shows motion information aiding the perception of depth. Also very important is the finding that when information from several cues is conflicting, the system will tend to accept the information generated by the stereo depth cue and ignore any conflicting information. At the same time, it seems that stereo image processing requires a significant amount of time (with respect to real-time processing of the image data), and is therefore simply overrun if the image data are presented too rapidly, requiring the system to fall back on other cues.