基于全景视觉的海天线提取方法研究.doc

基于全景视觉的海天线提取方法研究自动化学院 10041227 涂前指导教师:苏丽摘要本文进行基于全景视觉的海天线提取方法研究。课题首先对图像预处理方法进行了研究。全景图像的预处理有三步: 滤波、锐化、边缘检测。在图像预处理的基础上,重点进行了对全景图像中圆形海天线提取方法研究, 主要研究了两方面内容: (1) 基于全景柱面展开的直线海天线提取算法研究。对全景海域图像进行柱面展开。针对全景设备区成像对海天线检测的不良影响,设计了无关区域遮挡结合 Hough 变换的海天线提取算法和基于垂直方向最外边缘搜索结合 Hough 变换的海天线提取算法,分别实现了全景柱面展开图中的直线海天线提取,仿真结果验证了算法的有效性; (2) 基于全景图像的圆形海天线直接提取算法研究。设计了一种剔除无关边缘点的方法,有效消除了全景设备区成像对全景海天线检测的不良影响。在此基础上,分别采用 Hough 圆变换、随机 Hough 圆变换和基于最小二乘法的椭圆拟合直接提取圆形海天线, 仿真结果验证了算法的有效性。关键词: 全景视觉;可见光图像; 预处理; 海天线提取; Hough 变换 ABSTRACT In this paper, sea-sky-line extraction algorithm based on panoramic vision is studied. Subject first studied the image preprocessing method. Panoramic image preprocessing has three steps: filtering, sharpening, edge detection. On the basis of image preprocessing, we pay more attention on the research method to extract the circular sea-key-line in panoramic image, and studied the two main aspects: (1) Research on sea-key-line extraction algorithm based on panoramic cylinder unfolded. First , we unfold the cylindrical panoramic image. Considering the bad effects in sea-key-line detection influenced by panoramic imaging equipment area, we have designed sea-key-line extraction algorithm based on irrespective regional bined Hough transform and sea-key-line extraction algorithm based on the vertical direction of the outer edge search. The simulation results verify the effectiveness of the algorithm; (2) Research on circular sea-key-line extraction algorithm based on panoramic image. First of all, we designed a method about eliminating irrelevant edge points, which effectively eliminates negative effects exerted by the panoramic imaging equipment area in panoramic sea-key-line test. On this basis, respectively using Hough circular transformation, randomized Hough circular transformation and ellipse fitting based on least square method directly extract circular sea-key-line, and the simulation results verify the effectiveness of the algorithm. Key words : panoramic vision; visible image;