The preparation and characterization of high refractive index and heat-resistant silicone nanocomposites

Liu, Canqun; Gui, Dayong; Yu, Si; Chen, Wei; Zong, Yangyang

doi:10.1109/icept.2016.7583232

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…Figure 7 shows the MWIR images of two subjects before and after wearing 3D masks. Generally, the surface roughness of a 3D silicone mask is smaller than that of real facial skin and its surface refractive index is larger [31][32][33]. Thus, the MWIR DoLP of a 3D silicone mask is higher than that of a real human face.…”

Section: Data Collection and Composition Of Datasetmentioning

confidence: 99%

A 3D Mask Presentation Attack Detection Method Based on Polarization Medium Wave Infrared Imaging

Sun

Zeng

et al. 2020

Symmetry

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Facial recognition systems are often spoofed by presentation attack instruments (PAI), especially by the use of three-dimensional (3D) face masks. However, nonuniform illumination conditions and significant differences in facial appearance will lead to the performance degradation of existing presentation attack detection (PAD) methods. Based on conventional thermal infrared imaging, a PAD method based on the medium wave infrared (MWIR) polarization characteristics of the surface material is proposed in this paper for countering a flexible 3D silicone mask presentation attack. A polarization MWIR imaging system for face spoofing detection is designed and built, taking advantage of the fact that polarization-based MWIR imaging is not restricted by external light sources (including visible light and near-infrared light sources) in spite of facial appearance. A sample database of real face images and 3D face mask images is constructed, and the gradient amplitude feature extraction method, based on MWIR polarization facial images, is designed to better distinguish the skin of a real face from the material used to make a 3D mask. Experimental results show that, compared with conventional thermal infrared imaging, polarization-based MWIR imaging is more suitable for the PAD method of 3D silicone masks and shows a certain robustness in the change of facial temperature.

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Section: Data Collection and Composition Of Datasetmentioning

confidence: 99%

A 3D Mask Presentation Attack Detection Method Based on Polarization Medium Wave Infrared Imaging

Sun

Zeng

et al. 2020

Symmetry

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“…Silicone rubber gel can maintain a solid shape, and due to the advantages of dimensional stability, small shrinkage, deep curing, low crosslinking density, more flexible molecular chains, and smaller installation pressure, the addition of liquid silicone rubber gel is more studied and applied in the packaging of semiconductor SiC power devices [ 10 , 11 ]. In the current research, there is a lack of systematic research on the influence of hydrogen silicone oil type and content and aging time on the properties of additional liquid silicone rubber gel materials.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Methyl Hydro-Silicone Oil Content and Aging Time on Compression Modulus and Breakdown Strength of Additional Liquid Silicone Rubber Gel

Wang,

Chen,

Yang

et al. 2024

Polymers

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The performance of silicone rubber gel elastomers is affected by the composition and structure of the crosslinker. In this work, a two-component addition liquid silicone rubber gel material was developed, and the effects of the contents of two methyl hydro-silicone oils on the compression modulus and breakdown strength of the silicone rubber gel insulating material, as well as the performance change after hot air aging at different times (24 h, 48 h, 72 h, 96 h, 120 h, 144 h, 168 h), were studied. The results showed that the breakdown strength and compression modulus exhibited an upward trend with the increase in the hydrogen silicone oil content. The best performance was achieved in the silicone rubber gel with Si-H:Si-Vi = 1.4:1. Moreover, with the increase in aging time, the breakdown strength decreased and the compression modulus increased.

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The preparation and characterization of high refractive index and heat-resistant silicone nanocomposites

Cited by 2 publications

References 12 publications

A 3D Mask Presentation Attack Detection Method Based on Polarization Medium Wave Infrared Imaging

A 3D Mask Presentation Attack Detection Method Based on Polarization Medium Wave Infrared Imaging

Effect of Methyl Hydro-Silicone Oil Content and Aging Time on Compression Modulus and Breakdown Strength of Additional Liquid Silicone Rubber Gel

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