一种链码跟踪与相位验证相结合的直线提取方法

发布时间：2018-04-25 07:34

本文选题：直线提取 + 细化方法　；参考：《测绘学报》2017年02期

【摘要】：提出了一种链码跟踪与相位验证相结合的直线提取方法。该方法首先针对Canny边缘图提出一种完全细化方法;其次提出一种改进的链码跟踪方法,其步骤包括检测链码端点,建立动态链码主方向确定链码跟踪方向,优先跟踪八邻域内边缘点,八邻域内无边缘点再进行八邻域外边缘点,并采用直线化分析对链码进行动态约束;最后对链码进行直线拟合及相位验证,满足条件输出直线,不满足要求的链码则重新设定端点进行跟踪直线提取。通过多种不同光学图像数据的试验结果分析表明,本文所提出的方法不仅能够精确实现边缘直线信息的拟合,并且能够解决由于白噪声及相位编组所引起的直线断裂问题。
[Abstract]:A linear extraction method combining chain code tracking and phase verification is proposed. In this method, firstly, a complete refinement method is proposed for Canny edge graph, and then an improved chain code tracking method is proposed, which consists of detecting chain code endpoints and establishing dynamic chain code main direction to determine chain code tracking direction. The inner edge points of the eight neighbors are tracked first, the outer edge points of the eight neighbors are further carried out without edge points in the eight neighborhoods, and the chain codes are dynamically constrained by linearization analysis. Finally, the line fitting and phase verification of the chain codes are carried out to satisfy the condition of outputting the straight lines. If the chain code does not meet the requirements, the endpoint is reset to extract the tracking line. The experimental results of various optical image data show that the proposed method can not only accurately fit the edge line information, but also solve the linear fracture problem caused by white noise and phase grouping.
【作者单位】：辽宁工程技术大学测绘与地理科学学院;中国测绘科学研究院;
【基金】：国家自然科学基金(41271374;61540056;41401535) 对地观测技术国家测绘地理信息局重点实验室开放基金项目(K201402) 资源与环境信息系统国家重点实验室开放基金~~
【分类号】：P237;TP391.41

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