Obstacle Detection With A Sequence Of Ultra
Telephoto Camera Images
Author(s)
M. Ukai
Abstract
In order to detect obstacles on railway tracks, we have developed a forward
monitoring system, which plays an important role to ensure the safety of train
operation. In this paper, we propose a method of detecting obstacles with an
image sequence taken by an ultra telephoto lens camera mounted on train which
monitors the status of the track for 600m (brake distance) or over ahead of the
train. We first discussed the railway track environment recognition. Particularly
extraction of two parallel rails is a fundamental issue in applying image
processing to railways. It is inevitable to limit the area where obstacles exist. A
first detection algorithm is based on the analysis of optical flow which
characteristically occurs in those moving obstacles. Assuming that pixels
corresponding to the same object have similar flow vectors, we extract a
connected
Keywords
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