Research on the model of spectral BRDF for space target surface material

Sun, Chengming; Yuan, Yan; Zhang, Xiubao; Wang, Qian; Zhou, Zhiliang

doi:10.1109/isot.2010.5687369

Cited by 4 publications

(4 citation statements)

References 18 publications

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“…Since the wavelength of the TOF camera light source used in this paper is 850 nm, the parameters of the BRDF model at 850 nm are fitted, and the fitting error is expressed by the following formula [32,33].…”

Section: Target Materials Characteristics Modelingmentioning

confidence: 99%

Physics-Based TOF Imaging Simulation for Space Targets Based on Improved Path Tracing

et al. 2022

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Aiming at the application of close-up space measurement based on time-of-flight (TOF) cameras, according to the analysis of the characteristics of the space background environment and the imaging characteristics of the TOF camera, a physics-based amplitude modulated continuous wave (AMCW) TOF camera imaging simulation method for space targets based on the improved path tracing is proposed. Firstly, the microfacet bidirectional reflection distribution function (BRDF) model of several typical space target surface materials is fitted according to the measured BRDF data in the TOF camera response band to make it physics-based. Secondly, an improved path tracing algorithm is developed to adapt to the TOF camera by introducing a cosine component to characterize the modulated light in the TOF camera. Then, the imaging link simulation model considering the coupling effects of the BRDF of materials, the suppression of background illumination (SBI), optical system, detector, electronic equipment, platform vibration, and noise is established, and the simulation images of the TOF camera are obtained. Finally, ground tests are carried out, and the test shows that the relative error of the grey mean, grey variance, depth mean, and depth variance is 2.59%, 3.80%, 18.29%, and 14.58%, respectively; the MSE, SSIM, and PSNR results of our method are also better than those of the reference method. The ground test results verify the correctness of the proposed simulation model, which can provide image data support for the ground test of TOF camera algorithms for space targets.

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Section: Target Materials Characteristics Modelingmentioning

confidence: 99%

Physics-Based TOF Imaging Simulation for Space Targets Based on Improved Path Tracing

et al. 2022

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“…In existing studies, scientists used other methods to achieve the simulation of real metals. Sun et al [9] used a five-parameter BRDF model to simulate the effect of wavelength on reflection with silver-tin, and the wavelength was 0.038 to 2.5 μm. In his research, the simulated annealing algorithm was employed to match the five parameters in isolating the wavelength, but no uniform BRDF model was observed in the whole wavelength.…”

Section: Optical Roughness Brdf Modelmentioning

confidence: 99%

Optical roughness BRDF model for reverse Monte Carlo simulation of real material thermal radiation transfer

Eri

Wang

2014

Appl. Opt.

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Optical roughness was introduced into the bidirectional reflectance distribution function (BRDF) model to simulate the reflectance characteristics of thermal radiation. The optical roughness BRDF model stemmed from the influence of surface roughness and wavelength on the ray reflectance calculation. This model was adopted to simulate real metal emissivity. The reverse Monte Carlo method was used to display the distribution of reflectance rays. The numerical simulations showed that the optical roughness BRDF model can calculate the wavelength effect on emissivity and simulate the real metal emissivity variance with incidence angles.

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“…It is both impossible and unnecessary to calculate and consider all the influencing factors. Here, the primary error sources are considered, which include the light source, turntable mechanism, detector and the operator's artificial judgment [10]. The total measurement error of BRDF can be expressed as…”

Section: Measurement Error Of Brdfmentioning

confidence: 99%

“…Current correlative studies are concentrated on two main aspects. The first aspect is the optical scattering characteristics of various satellite surface materials, including the modeling, optimization and measurement of materials' bidirectional reflectance distribution function (BRDF) [8][9][10][11]. The second aspect is the entire or general scattering characteristics of the space target, which includes the measurement, prediction and simulation calculation of the OCS or magnitude of the target, as well as the analysis of the change of the special satellite's irradiance over time, etc [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the optical scattering characteristics of different types of space targets

Han

Sun

Feng

et al. 2014

Meas. Sci. Technol.

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This paper mainly focused on the measurement, evaluation and potential identification methods of the unresolved space target's photometric characteristics. The bidirectional reflectance distribution function (BRDF) measurement system was introduced first, and then the measurement error of BRDF and its influence on target's optical cross section (OCS) and magnitude were analyzed. Then, different space targets’ OCS and magnitude changing with different factors, such as surface materials and shapes, flying conditions and working states, were analyzed respectively, and some general inclusions of variation laws were deduced. This research can provide references for future studies on space target classification and identification based on the photometric measurement data.

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Research on the model of spectral BRDF for space target surface material

Cited by 4 publications

References 18 publications

Physics-Based TOF Imaging Simulation for Space Targets Based on Improved Path Tracing

Physics-Based TOF Imaging Simulation for Space Targets Based on Improved Path Tracing

Optical roughness BRDF model for reverse Monte Carlo simulation of real material thermal radiation transfer

Analysis of the optical scattering characteristics of different types of space targets

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