摘要
随着信息时代的到来,图像特征提取成为三维城市建模的关键问题之一,同时也是计算机视觉和图像理解领域的研究前沿,而在特征提取过程中,直线提取方法尤为重要。鉴于Hough变换直线提取具有几何解析性简单、容错性和鲁棒性好,能够较好地处理局部遮挡、覆盖等优点,本文把基于Hough变换的直线提取作为研究重点。首先,对国内外Hough变换直线提取方法的产生及研究现状进行了概述,然后,利用Canny算子和Freeman链码对该方法进行改进,并对优化后的Hough变换直线提取方法进行了全面的实验与分析。结果表明,该方法取得了更加可靠的直线提取结果。
With the coming of the information age, the extraction of image features has become one of the key problems in 3D urban modeling. It has also become a research frontier in the field of computer vision and image comprehension. In the process of feature extraction, the line extraction method is especially important. The line extraction of Hough transform has the advantages of simple geometric resolution, high fault tolerance and good robustness. It can also better deal with local occlusion and coverage. In this paper, the line extraction based on Hough transform is used as the research focus. Firstly, this paper gives a comprehensive overview of the generation and research status of Hough transform line extraction methods at home and abroad. Then the Canny operator and the Freeman chain code are used to improve the method, and some experiments and analysis are carried out for the optimized Hough transform. Experiment results show that they have been more reliable than before.
作者
王琦
宋伟东
王竞雪
WANG Qi;SONG Weidong;WANG Jingxue(School of Geomatics, Liaoning Technical University, Fuxin 123000, China)
出处
《测绘与空间地理信息》
2019年第6期214-217,221,共5页
Geomatics & Spatial Information Technology
