新型对地观测多光谱激光雷达及其控制实现

基金项目: ?国家973计划资助项目(2012CB719900)

详细信息

Automatic Urban Area Extraction Using a Gabor Filter and High-Resolution Remote Sensing Imagery

¹School of Geosciences and Info-Physics,Central South University,South Lushan Road,Changsha 410083,China

Funds: ?国家973计划资助项目(2012CB719900)

摘要: 提出新型对地观测多光谱激光雷达,采用556nm、660nm、705nm和785nm共4个波长,进行不同波长同时收发及扫描、测距设计,通过对扫描、测距及多光谱数据采集等操作的有效控制,实现了地物三维空间数据和多光谱数据的同步获取,并且通过地面实验对多光谱激光雷达的性能进行了展示,验证了系统设计及控制实现的可行性及优势。
- 激光雷达 /
- 多光谱 /
- 同步获取 /
- 控制
Abstract: A new automatic urban area extraction method from high-resolution remote-sensing imagery that exploits the unique local features of urban area is presented in this paper.The proposed algorithm contains the following steps: First,it obtains the filtering response images with Gabor filters grouped at various central frequencies and orientations;Secondly,we use the Ostu’s method to implement threshold segmentation,and then realize the logical and operation in the various orientations of every central frequency;Thirdly,we determine the optimal central frequency with the Gabor features distribution information;Finally,with the information above,we extract the urban area by forming the spatial voting matrix with the Gaussian function.Experimental results show that the approach is able to detect the urban areas in the high-resolution remote-sensing imagery.The results of a performance evaluation also support the high precision of this approach.
- high-resolution

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