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摘要： 针对树木或高大建筑物遮挡以及噪声等因素造成道路提取结果不完整的现象，根据道路的几何特征，在Snake模型中加入道路宽度信息，构造Ribbon Snake模型。为了克服模型对内部参数依赖性较大、容易受到复杂背景干扰影响的不足，采用B样条曲线对道路的平滑性进行约束，与Ribbon Snake相结合建立道路提取算法，通过调节控制点的数目增强曲线的灵活性。从改进的B样条Ribbon Snake的道路网分割结果可以看出，分割的结果更加平滑，精度更高，对噪声具有更好的鲁棒性。
