CAJ | 학술논문

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.
위제고연안、도초적조석측량급내륙수위감측적궤동령활성,설계료일충감입식、비접촉수위자동측량적수척도상채집여처리계통.해계통포괄료성상단원,수거채집、처리화존저단원,교호접구단원.기우실제사용정황,제출료일충수척자동판독산법.이용전감기적창구절취특성,채집함유소량배경신식적수척도상;채용Sobel수평변연검측산자진행특정제취;최후채용투영분석적판법래판독수척신식.수역실험결과표명,해계통능진행전천후적수위자동측량.재성상거리위25~100 m범위내,체도6 mm이내적판독정도.
@@@@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.