边缘检测法在线阵CCD中的应用  

Application of edge detection method in linear array CCD

作　　者：瞿仕波[1] 周炎涛[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《传感器与微系统》2013年第8期149-152,共4页Transducer and Microsystem Technologies

基　　金：广东省部产学研结合资助项目(2011B090400628)

摘　　要：根据工业、交通等领域对于非接触测量越来越高的精度需求,采用先进的线阵耦合器件(CCD)和复杂可编程逻辑器件(CPLD)技术,设计了一种用于实现高精度边缘检测的系统。系统将一维视频信号的噪声通过滤波技术、相关双采样技术进行消除,经A/D转换后求出信号灰度梯度最大的点,由直线拟合方法确定出经过平滑滤波处理的CCD图像的亚像元级边界。系统测试表明:所设计的片上系统具有高精度、高速度、高集成度、高可靠性的特性,有很强的实用性。According to industry and transportation and other fields have higher and higher demands on precision of non-contact detection,a kind of system is designed for high-precision edge detection using advanced CCD and CPLD technology.The noise of one-dimensional video signal is eliminated by system through filtering and correlated double sampling technologies.Then the maximal point of signal gray scale gradient is worked out after A/D transformation.Straight line fitting method determines sub-pixel boundary of CCD image which is disposed by smoothing filtering.System testing indicates that the designed system on chip is characterized by high precision,high-speed,high-integration,high reliability and strong practical applicability.

关 键 词：电荷耦合器件 边缘检测 相关双采样 线性拟合 

分 类 号：TP211.6[自动化与计算机技术—检测技术与自动化装置] TP391[自动化与计算机技术—控制科学与工程]