光学遥感影像道路提取的方法综述(18)
Template matching methods can be generally divided into rule template and variable template according to template type. The difference between the two types is whether the template can be drawn with regular graphics. Template matching mainly consists of the following three steps:template design,measure analysis,and location template design can usually be set manually or by certain rules. Then, the target template is given in the measure analysis. Furthermore, the extreme value of the region is found by the measure function within the defined ,the location of the road centerline is dynamically updated.
Roads, as artificial ruled features, provide large information. Hence, knowledge-driven methods based on relevant knowledge are used in road extraction work. On the basis of the relationship between knowledge and road, this study divides the knowledge-driven methods by three kinds: geometric knowledge, context knowledge, and auxiliary knowledge. Three methods are described as follows: (1) Geometric knowledge. The model is mainly constructed on the basis of the geometric features of the road. (2) Contextual knowledge. The method utilizes road-related auxiliary knowledge (motor vehicles, trees, zebra crossings, et al.) to assist in identifying the road. (3) Assisting knowledge. Road extraction is guided by using multisource remote sensing data, vector data, GPS data, navigation data, and public source data.
With the rapid increase of spatial resolution of optical remote sensing images, object-oriented methods have gradually become one of key methods in road ,the method selects the spectral and geometric feature criteria to segment ,the geometric radiation similarity criterionis used to classify the segmentation region. Finally, the road extraction results are released by post-processing methods,such as mathematical morphology,matching tracking,and tensor voting.
Road extraction research belongs to the problem of remote sensing image interpretation, whereas deep learning supplies a new opportunity for satellite image interpretation in a semantic direction. Deep learning extracts road information with high precision through convolution,pooling,and ,road breakage and mistaken extraction problems still exist.
文章来源:《光学与光电技术》 网址: http://www.gxygdjs.cn/qikandaodu/2021/0622/593.html
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