Wenxin Tian, Yuwei Chen, Lingli Tang, Ziyang Li, Shi Qiu, Haohao Wu, Huijing Zhang, Linsheng Chen, Changhui Jiang, Peilun Hu, Jianxin Jia, Haibin Sun, Yicheng Wang, Yihua Hu. Bidirectional reflectance distribution function model of rough surface based on backscatter intensity of hyperspectral LiDAR[J]. Infrared and Laser Engineering, 2023, 52(10): 20230108
- Infrared and Laser Engineering
- Vol. 52, Issue 10, 20230108 (2023)
Fig. 1. (a) The larger the variance of the normal direction of the micro surface, the rougher the macro surface; (b) The smaller the variance of the normal direction of the micro surface, the smoother the macro surface
Fig. 2. Schematic diagram of Oren-Nayar model
Fig. 3. Hyperspectral LiDAR system. (a) Composition diagram of hyperspectral LiDAR system; (b) Principle prototype of hyperspectral LiDAR
Fig. 4. Experimental sample. (a) White paper; (b) Floor tiles; (c) Concrete; (d) Gypsum; (e) Orthoclase; (f) Silica; (g) Granite; (h) Griotte
Fig. 5. Schematic diagram of distance effect experiment
Fig. 6. Incident angle effect of backscatter intensity of hyperspectral LiDAR at different wavelengths. (a) White paper; (b) Floor tiles; (c) Concrete; (d) Gypsum; (e) Orthoclase; (f) Silica; (g) Granite; (h) Griotte
Fig. 7. Scatter plot and Lambertian model fitting curve of backscatter intensity (650 nm). (a) Floor tiles; (b) Concrete
Fig. 8. Distance effect of backscatter intensity of 100% diffuse reflective whiteboard at different wavelengths. (a) The curve of the backscatter intensity varying with R ; (b) Curve of backscatter intensity varying with
Fig. 9. Distance effect of backscatter intensity of 70% diffuse reflective whiteboard at different wavelengths. (a) The curve of the backscatter intensity varying with R ; (b) Curve of backscatter intensity varying with
Fig. 10. Calculation results of
Fig. 11. Backscatter intensity of different wavelengths after correction of Oren-Nayar model. (a) White paper; (b) Floor tiles; (c) Concrete; (d) Gypsum; (e) Orthoclase; (f) Silica; (g) Granite; (h) Griotte
Fig. 12. Reflectance comparison of different incident angles before and after correction of concrete. (a) Before correction; (b) After correction of Lambert model; (c) After correction of Oren-Nayar model
Fig. 13. Standard deviation of reflectance at different incident angles. (a) White paper; (b) Floor tiles; (c) Concrete; (d) Gypsum; (e) Orthoclase; (f) Silica; (g) Granite; (h) Griotte
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Table 1. σmean calculation results of different samples of Oren-Nayar model
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Table 2. Average value of standard deviation of reflectance at different incident angles
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