光学学报, 2020, 40 (22): 2230001, 网络出版: 2020-10-25
基于多光谱成像和随机森林算法的石窟表面风化智能评估方法 下载: 962次
Intelligent Evaluation Method of Grottoes Surface Weathering Based on Multispectral Imaging and Random Forest Algorithm
图 & 表
图 1. 不同风化类型及风化程度石窟表面的反射光谱表征
Fig. 1. Characterization of reflection spectrum of grottoes surface with different weathering types and degrees
图 2. 不同风化类型及风化程度石窟表面的光谱反射率
Fig. 2. Spectral reflectance of grotto surface with different weathering types and degrees
图 3. 不同风化类型及风化程度石窟表面光谱反射率的一阶导数特征
Fig. 3. Characteristics of the first derivative of spectral reflectance of grotto surface with different weathering types and degrees
图 4. 风化类型及风化程度评估方法的技术框图
Fig. 4. Technical block diagram of weathering types and degrees evaluation method
图 6. 石窟表面多光谱成像数据采集。(a)目标采集区域的RGB图像;(b)目标区域的640 nm多光谱影像;(c)采样点分布
Fig. 6. Multispectral imaging data collection on grotto surface. (a) RGB image of target collection area; (b) 640 nm multi-spectral image of target area; (c) distribution of sampling points
图 8. 不同风化类型及风化程度石窟表面的标准化光谱反射率数据
Fig. 8. Normalized spectral reflectance data of grotto surface with different weathering types and degrees
图 9. 不同风化类型及风化程度石窟表面标准化光谱反射率数据的一阶导数特征
Fig. 9. Characteristics of the first derivative of standardized spectral reflectance date of grotto surface with different weathering types and degrees
图 11. 4种算法对石窟表面整体风化类型及风化程度的评估结果。(a)真实的风化类型及风化程度;(b) RF算法;(c) SVM算法;(d) SAM算法;(e) CNN算法
Fig. 11. Assessment results of four algorithms on overall weathering types and degrees of grotto surface. (a) True weathering types and degrees; (b) RF algorithm; (c) SVM algorithm; (d) SAM algorithm; (e) CNN algorithm
表 14种算法预测结果的对比
Table1. Comparison of prediction results of four algorithms
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表 24种算法的混淆矩阵对比
Table2. Comparison of confusion matrix of four algorithms
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曹赤鹏, 王慧琴, 王可, 王展, 张刚, 马涛. 基于多光谱成像和随机森林算法的石窟表面风化智能评估方法[J]. 光学学报, 2020, 40(22): 2230001. Chipeng Cao, Huiqin Wang, Ke Wang, Zhan Wang, Gang Zhang, Tao Ma. Intelligent Evaluation Method of Grottoes Surface Weathering Based on Multispectral Imaging and Random Forest Algorithm[J]. Acta Optica Sinica, 2020, 40(22): 2230001.