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Block-index Curved Fitting Filtering Method Guided by Gradient Based on LiDAR Data
Pages: 16-19
Year: Issue:  4
Journal: Hydrographic Surveying and Charting

Keyword:  point cloud datagradientfilteringblock indexblock size;
Abstract: 根据点云密度确定分块曲面滤波区块的大小,通过构建梯度引导图,引导进行分块曲面滤波,并利用得到的初始结果对滤波进行进一步细化.将最后滤波结果的总错误率与ISPRS提供的测试方法进行比对,在3个测区内总错误率均低于ISPRS提供的方法.实验结果表明,该方法不受建筑物大小的影响,在保证较好滤波结果的基础上,提高了算法的自适应性和滤波的自动化程度.
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