激光与光电子学进展, 2017, 54 (12): 122802, 网络出版: 2017-12-11
多站地面三维激光扫描强度数据纠正与归一化 下载: 882次
Correction and Normalization of Multi-Scan Terrestrial Three-Dimensional Laser Scanning Intensity
遥感 地面三维激光扫描 强度 纠正 高斯混合模型 归一化 remote sensing terrestrial three-dimensional laser scanning intensity correction Gaussian mixture model normalization
摘要
针对地面三维激光扫描强度纠正局限于单站点云强度纠正的问题, 提出基于高斯混合模型的直方图匹配方法, 对多站点云强度进行纠正。该方法通过拟合距离-强度模型与入射角-强度模型, 对单站点云强度值进行纠正。利用高斯混合模型拟合纠正后的单站点云强度直方图, 并对直方图进行分割。通过子直方图匹配对多站点云强度进行归一化。实验结果表明, 本文提出的方法不仅可以有效纠正单站点云强度值的差异, 也可以改善多站点云强度值的差异。
Abstract
Current point cloud intensity correction is confined to single scan station. In order to solve this problem, we propose a histogram equalization method for multi-scan intensity based on Gaussian mixture model. Firstly, the range-intensity and incidence angle-intensity correction models are used to correct the intensity for a single scan station. Then Gaussian mixture model is used to fit the histogram of intensity distribution after correction and segment the histogram. Finally, normalization of multi-scan intensity is achieved through sub-histogram matching. The experiment results indicate that the proposed method can not only correct the intensity of a single scan station efficiently, but also improve the inconsistence among different scan stations.
李泉, 程效军, 田芮, 杨泽鑫. 多站地面三维激光扫描强度数据纠正与归一化[J]. 激光与光电子学进展, 2017, 54(12): 122802. Li Quan, Cheng Xiaojun, Tian Rui, Yang Zexin. Correction and Normalization of Multi-Scan Terrestrial Three-Dimensional Laser Scanning Intensity[J]. Laser & Optoelectronics Progress, 2017, 54(12): 122802.