光电工程, 2013, 40 (4): 1, 网络出版: 2013-05-24   

嵌入式水尺图像检测系统与判读算法研究

Embedded Measurement System and Interpretation Algorithm for Water Gauge Image
黄战华 1,2,*熊浩伦 1,2朱猛 1,2蔡怀宇 1,2
作者单位
1 天津大学精密仪器与光电子工程学院
2 光电信息技术教育部重点实验室, 天津 300072
摘要
为提高沿岸、岛礁的潮汐测量及内陆水位监测的机动灵活性, 设计了一种嵌入式、非接触水位自动测量的水尺图像采集与处理系统。该系统包括了成像单元, 数据采集、处理和存储单元, 交互接口单元。基于实际使用情况, 提出了一种水尺自动判读算法。利用传感器的窗口截取特性, 采集含有少量背景信息的水尺图像; 采用 Sobel水平边缘检测算子进行特征提取; 最后采用投影分析的办法来判读水尺信息。水域实验结果表明, 该系统能进行全天候的水位自动测量。在成像距离为 25~100 m范围内, 达到 6 mm以内的判读精度。
Abstract
A non-contact, embedded water gauge image acquisition and processing system for water level measurement is designed, which can improve the measurement and monitoring flexibility of coast and reefs tides. This system includes imaging unit, data processing unit, storage and interactive unit. For practical application, a water gauge automatic interpretation algorithm is proposed, which includes: the water gauge image collection that contains only a small scale of image using the window interception feature of the sensor, and the Sobel horizontal edge detection operator to extract features and auto-interpretation of the water gauge with the projection analysis method. The experimental results in water show that this system can achieve auto-interpretation measurement of water gauge around the clock. Under the condition that the image distance varies from 25 m to 100 m, maximum interpretation accuracy 6 mm is obtained.

黄战华, 熊浩伦, 朱猛, 蔡怀宇. 嵌入式水尺图像检测系统与判读算法研究[J]. 光电工程, 2013, 40(4): 1. HUANG Zhanhua, XIONG Haolun, ZHU Meng, CAI Huaiyu. Embedded Measurement System and Interpretation Algorithm for Water Gauge Image[J]. Opto-Electronic Engineering, 2013, 40(4): 1.

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