The trees threw bands of shadow across the sidewalk.

树木在人行道上留下了数条阴暗的光带。

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This paper proposes a blind sidewalk detecting and tracing algorithm based on the color information and lays emphasis on dealing with the change of illumination and the cast shadow.

本文提出了一种基于颜色信息的盲道区域识别与跟随算法，侧重于解决光照条件改变与有投射阴影的条件下导盲道的识别问题。

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