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A Video Image Analysis System for Tunnel Lighting Automatic Control

Huang ke, Weng ji

Abstract


The most important part of tunnel lighting is the entrance section, which is the starting point of the whole tunnel, and the entrance illumination should not only adapt to the surrounding environment brightness but reasonable reduce to the interior section of the tunnel. When the outside environment brightness L20 changes, the brightness of tunnel entrance Lth should adjusted to match the vision needs. As the object logarithmic brightness and image gray scale logarithm is in a linear relationship, the environment luminance information can be extracted from a digital image by using HD digital monitoring probe. Based on the video image analysis system, the tunnel lighting can be adjusted automatically by processing the information of environment brightness, traffic flow and speed.

Keywords


tunnel lighting, environment information, automatic control.

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