|Table of Contents|

Visibility measurement of highway based on digital image processing technology(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2010年05期
Page:
89-92
Research Field:
Publishing date:
2010-10-20

Info

Title:
Visibility measurement of highway based on digital image processing technology
Author(s):
GUAN Ke1;  QI Shu-min1;  LIANG Jia2
1. School of Information Engineering, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Sunyard Technology Co Ltd, Hangzhou 310053, Zhejiang, China
Keywords:
image processing;  freeway;  visibility;  DSP
PACS:
TN911.73; U491.53
DOI:
-
Abstract:
The theoretical analysis for calculating air visibility shows the feasibility to apply digital image processing technology on air visibility measurement, based on which a new freeway air visibility measurement system is proposed. The hardware structure of the freeway air visibility measurement system is composed of high performance DSP IC, model TMS320C6713, the core of the structure, analog image-sampling circuit, A/D conversion circuit, image storage, power management module and communication module and the arithmetic of the system can be divided into three steps, which are brightness correction, self adapt threshold and the object separation from background and calculation of air visibility. The examinations to the system testify that it can work well in the different weather conditions of freeway. The measurement accuracy can be achieved by ±13%, which can satisfy the requirement of highway meteorological visibility measurement, ±20% in two kilometer. 4 figs, 8 refs.

References:

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Memo

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Last Update: 2010-10-20