Obstacle Avoidance Using Flow Field Divergence
IEEE Transactions on Pattern Analysis and Machine Intelligence
A Diffusion Mechanism for Obstacle Detection from Size-Change Information
IEEE Transactions on Pattern Analysis and Machine Intelligence
Neural Processing Letters
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It is shown that a tiled floor provides continuous stabilizing visualinformation against stumbling and falling while walking. A steadywalk, eyes at a nearly constant height, maintains a certain level ofnet optical flow in a tile‘s image. A stumble generates a disturbancein the net flow, which is fed back as a corrective signal to thelimbs. This may explain why people with certain motoric disorders,such as those associated with Parkinson‘s disease, appear to be morecomfortable walking on tiled floors than on untiled ones.