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25～100m范围内,达到6mm以内的判读精度。
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.
出处
《光电工程》
CAS
CSCD
北大核心
2013年第4期1-7,共7页
Opto-Electronic Engineering
基金
教育部博士点基金资助项目(20110032120059)
关键词
水位测量
图像检测
投影分析
自动判读
water level measurement
image detection
projection analysis
automatic interpretation
