针对Canny边缘检测算法中通过固定的高低阈值而产生边缘的方法调参繁琐且有边缘间断或伪边缘的问题, 文章基于边缘特征的AdaBoost连接算法, 结合梯度信息、方向信息, 通过训练标记了的边缘结构的边缘特征数据, 将多个弱边缘分类器加权组合成强边缘分类器, 计算出图像中边缘端点与相邻端点的连接置信度, 判断端点之间是否连接。结果表明, 改进边缘连接的Canny算法具有更好的端点识别和连接能力, 能够有效连接漏掉的边缘, 且能获得完整干净的边缘。
边缘检测 边缘特征 连接 置信度 分类器 edge detection edge character connection confidence level classifier
Author Affiliations
Abstract
Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
We study the performance of an orthogonal modulation system with frequency-shift keying (FSK) label and optical Manchester-coded (MC) payload. Simulation result shows that by introducing an optical MC payload, the available extinction ratio (ER) value of a FSK and intensity modulation (IM) orthogonal modulation system can be improved from 5 to 9 dB for system optimization, exhibiting great advantages over the traditional non-return-to-zero (NRZ) payload. Besides, the bit error rate (BER) characteristics of both label and payload show a more remarkable advantage than that of NRZ coding, verifying itself as a perfect candidate for the payload coding method in orthogonal modulation systems.
光曼彻斯特编码 马赫曾德调制器 正交调制 消光比 060.2330 Fiber optics communications 060.4080 Modulation Chinese Optics Letters
2010, 8(5): 464
