基于平行活动围道模型的高分辨率遥感影像城区主干道路段提取

为了提取并表示高分辨率遥感影像中的主干道路段，提出了一种多分辨框架下的平行活动围道模型的算法.该算法在活动围道模型原理的基础上，重新定义各能量项:采用抛物线做为道路段的先验模型，增加了平行性能量，并采用多分辨框架下的梯度做为外部能量.该模型的优化过程实现了道路的定位，得到的结果是平行抛物线的参数，实现了道路的矢量表示.实验结果表明，能有效提取高分辨率遥感影像中的主干道路段.

Parallel Active Contour Model for Main Road Segments Extraction From High-resolution Remote Sensing Images

An algorithm of parallel active contour model based on multi-scale frame is proposed to extract and represent main road segments from high-resolution remote sensing images.Energies in active contour model are redifined as following: using parabola to model two sides of main road segments as a prior,adding parallel energy,and adopting gradients in multi-scale frame as exterior energy.Optimizing the model results in location the two edges of road which is represented as a vectorgraph by the parameter of parallel parabolas.Experiment results demonstrate the algorithm's effectiveness in extracting main road segments from high-resolution images.