Parameter fitting method of BRDF model based on generalized inverse matrix

ZHAO Jiale; ZHOU Bing; WANG Guanglong; YING Jiaju; WANG Qianghui; DENG Lei

doi:10.7510/jgjs.issn.1001-3806.2023.03.019

LASER TECHNOLOGY > 2023 > 47(3): 407-412. > DOI: 10.7510/jgjs.issn.1001-3806.2023.03.019

ZHAO Jiale, ZHOU Bing, WANG Guanglong, YING Jiaju, WANG Qianghui, DENG Lei. Parameter fitting method of BRDF model based on generalized inverse matrix[J]. LASER TECHNOLOGY, 2023, 47(3): 407-412. DOI: 10.7510/jgjs.issn.1001-3806.2023.03.019

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Parameter fitting method of BRDF model based on generalized inverse matrix

1.
Department of Electronic and Optical Engineering, Shijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang 050003, China
2.
Department of Missile Engineering, Shijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang 050003, China

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Received Date: March 23, 2022
Revised Date: April 17, 2022
Published Date: May 24, 2023

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Abstract

Abstract

In order to improve the efficiency of parameter fitting of binary reflectance distribution function (BRDF)model and understand the spectral direction characteristics of ground object more specifically, a method of parameter fitting of BRDF model based on generalized inverse matrix was proposed. Firstly, the directional characteristics of spectral reflection of ground objects were analyzed, and then the spectral reflectance of targets in different directions was measured by imaging spectrometer. The experimental conditions and a priori measurement data were substituted into BRDF model, the generalized inverse matrix equation was established, and the model parameters of measurement targets were fitted. Using the BRDF model parameters of fitting the push any particular direction under the condition of spectral reflectance and compared with experimental data. Spectral angle mapping method was used to measure its similarity and the results showed that the grass and camouflage raincoat fitting spectrum curve and the measured spectral curve similarity is very high, up to the 0.1307 and 0.0896, confirmed the validity of the parameter fitting method, the ability to verify the generalization of the BRDF model fitting. This method is simple in principle, fast and effective, and provides reference for other types of BRDF model parameter fitting and subsequent research on spectral characteristics of ground objects.
- spectroscopy,
- binary reflectance distribution function,
- generalized inverse matrix,
- parameter fitting

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References

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