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http://dx.doi.org/10.5573/ieie.2015.52.4.156

Active Water-Level and Distance Measurement Algorithm using Light Beam Pattern  

Kim, Nac-Woo (ETRI, IT Management Device Research Section)
Son, Seung-Chul (ETRI, IT Management Device Research Section)
Lee, Mun-Seob (ETRI, IT Management Device Research Section)
Min, Gi-Hyeon (ETRI, IT Management Device Research Section)
Lee, Byung-Tak (ETRI, IT Management Device Research Section)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.52, no.4, 2015 , pp. 156-163 More about this Journal
Abstract
In this paper, we propose an active water level and distance measurement algorithm using a light beam pattern. On behalf of conventional water level gauge types of pressure, float-well, ultrasonic, radar, and others, recently, extensive research for video analysis based water level measurement methods is gradually increasing as an importance of accurate measurement, monitoring convenience, and much more has been emphasized. By turning a reference light beam pattern on bridge or embankment actively, we suggest a new approach that analyzes and processes the projected light beam pattern image obtained from camera device, measures automatically water level and distance between a camera and a bridge or a levee. As contrasted with conventional methods that passively have to analyze captured video information for recognition of a watermark attached on a bridge or specific marker, we actively use the reference light beam pattern suited to the installed bridge environment. So, our method offers a robust water level measurement. The reasons are as follows. At first, our algorithm is effective against unfavorable visual field, pollution or damage of watermark, and so on, and in the next, this is possible to monitor in real-time the portable-based local situation by day and night. Furthermore, our method is not need additional floodlight. Tests are simulated under indoor environment conditions from distance measurement over 0.4-1.4m and height measurement over 13.5-32.5cm.
Keywords
Light beam pattern; water-level measurement; distance measurement;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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