Evaluation of the shape of the specular peak for high glossy surfaces

Obein, Gaël; Ouarets, Shiraz; Ged, Guillaume

doi:10.1117/12.2040350

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…Achieving such a resolution is of course a way to see what the human eye, with its typical resolution of 1 ′ ~0.017°, perceives. It also reveals other effects not perceived visually, namely strong intensity fluctuations superimposed within the specular peak of the BRDF [4,6]. The question we address in this article is the nature of these fluctuations.…”

Section: Introductionmentioning

confidence: 93%

Study and simulations of speckle effects on BRDF measurements at very high angular resolution

Labardens¹,

Chavel²,

Sortais³

et al. 2021

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Section: Introductionmentioning

confidence: 93%

Study and simulations of speckle effects on BRDF measurements at very high angular resolution

Labardens¹,

Chavel²,

Sortais³

et al. 2021

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“…Camera with fisheye On adjustable holder Traditional BRDF measurement technology is becoming increasingly sophisticated. At present, it is known that the BRDF measurement device with the best angular resolution is the Condor device proposed by LNE-CNAM in 2015, with an angular resolution of 0.022° [56][57][58]. The SOC series BRDF test device developed by US SOC (Surface Optics Corporation) is one of the typical commercial device that has achieved the establishment of a large BRDF database [59].…”

Section: Sample Holder With Precision Screws Plate Samplementioning

confidence: 99%

Developmental Trends in the Application and Measurement of the Bidirectional Reflection Distribution Function

Zou

Zhang

et al. 2022

Sensors

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The bidirectional reflection distribution function (BRDF) is among the most effective means to study the phenomenon of light–object interaction. It can precisely describe the characteristics of spatial reflection of the target surface, and has been applied to aerial remote sensing, imaging technology, materials analysis, and computer rendering technology. This study provides a comprehensive review of the development of devices to measure the BRDF. We gathered research in the area by using the Web of Science Core Collection, and show that work on the BDRF has been ongoing in the last 30 years. We also describe some typical measurement devices for the BRDF proposed in the literature. Finally, we summarise outstanding problems related to BRDF measurement and propose directions of future research in the area.

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“…It corresponds to a balance between avoiding over-filtering effects due to low number of cells, and noisy representation in reconstructed signal due to too small cells (Figure 6). As a comparison, the EZ-Contrast from Eldim [41] has an angular resolution of 0.4 • and the ConDOR facility (Conoscopic Device for Optic Reflectometry) [42] developed by the LNE-CNAM has an angular resolution of 0.018 • (this is one of the most precise existing device). The latter is dedicated to study the shape of a 1 • width specular peak that does not correspond to our level of surface roughness study.…”

Section: A Virtual Goniophotometermentioning

confidence: 99%

Design of rough microgeometries for numerical simulation of material appearance

et al. 2020

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Microfacet-based material appearance models are commonly considered as a physical plausible representation of matter–light interaction. With such models, the microgeometry of a surface element is defined by a statistical distribution of microfacets. The mathematical formulation ensures physical plausibility, such as energy conservation and reciprocity. Many authors have addressed microfacet bidirectional scattering distribution function (BSDF) representations, with various normal distribution functions (NDFs) and their relationship with shadowing and masking, or the effects due to multiple light scattering on the microgeometry. However, an extensive study on how an actual microgeometry drives material appearance still is missing. This question is a key issue for inverse design and manufacturing. This paper contributes to filling this gap by proposing a complete pipeline composed of a microgeometry generation process and numerical lighting simulation. From any input NDF, our method generates a controlled and structured microgeometry, integrated within numerical light scattering simulation. Reflected light is gathered using a virtual goniophotometer. From a given set of parameters, we use our pipeline to study the impact of microgeometry structures on material light scattering in the case of rough surfaces. The obtained results are discussed and compared with already existing approaches when they exist in the pipeline.

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Evaluation of the shape of the specular peak for high glossy surfaces

Cited by 9 publications

References 9 publications

Study and simulations of speckle effects on BRDF measurements at very high angular resolution

Study and simulations of speckle effects on BRDF measurements at very high angular resolution

Developmental Trends in the Application and Measurement of the Bidirectional Reflection Distribution Function

Design of rough microgeometries for numerical simulation of material appearance

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