Physically inspired technique for modeling wet absorbent materials

Bajo, Juan M.; Delrieux, Claudio; Patow, Gustavo

doi:10.1007/s00371-020-01963-w

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…It is worth noting that physically inspired (instead of physically based) methods are extensively employed in different areas of computer graphics (e.g. [ 4 , 37 , 41 , 46 ]). These methods, albeit inspired by real physical observations, are developed from a relaxation of physically based methodology in order to avoid complex formulations and, consequently, keep the representation of different materials plausible at a relatively low cost.…”

Section: Introductionmentioning

confidence: 99%

Observation-driven generation of texture maps depicting dust accumulation over time

Santos

Baranoski

2022

Vis Comput

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The perception of realism in computer-generated images can be significantly enhanced by subtle visual cues. Among those, one can highlight the presence of dust on synthetic objects, which is often subject to temporal variations in real settings. In this paper, we present a framework for the generation of textures representing the accumulation of this ubiquitous material over time in indoor settings. It employs a physically inspired approach to portray the effects of different levels of accumulated dust roughness on the appearance of substrate surfaces and to modulate these effects according to the different illumination and viewing geometries. The development of its core algorithms was guided by empirical insights and data obtained from observational experiments which are also described. To illustrate its applicability to the rendering of visually plausible depictions of time-dependent changes in dusty scenes, we provide sequences of images obtained considering distinct dust accumulation scenarios.

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Section: Introductionmentioning

confidence: 99%

Observation-driven generation of texture maps depicting dust accumulation over time

Santos

Baranoski

2022

Vis Comput

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“…Although the static contact angles of sample B72 and PDMS were hydrophobic, the free water absorption rate of sample PDMS was significantly lower than that of sample B72, indicating that the short−term water repellency and long−term wettability of the stone were two independent results. The static contact angle reflected the wettability of the sandstone surface coating, while the free water absorption result reflected the compactness of the coating and the internal structure of the sandstone [43]. The porosities of the samples Blank, SiON, B72, and PDMS were 10.06%, 7.12%, 8.96%, and 7.64%, respectively (Figure S5).…”

Section: Water Repellency Analysismentioning

confidence: 99%

Application of SiON Coatings in Sandstone Artifacts Conservation

2022

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For a long time, a large number of sandstone cultural relics have been exposed to the outdoors, and they are facing unprecedented threats. Curing perhydropolysilazane at varied pyrolysis times results in a series of SiON solids. Fourier transform infrared absorption spectroscopy (FTIR) results show that the Si−H bond disappears at 2163 cm−1, and that the Si−O peaks at 460 cm−1, becoming stronger during the pyrolysis of Perhydropolysilazane (PHPS) to SiON solids. X-ray photoelectron spectroscopy (XPS) results indicate a decrease in the proportion of N atoms from 22.71% to 3.38% and an increase in the proportion of O atoms from 59.74% to 69.1%, indicating a gradual production of SiO2 from perhydropolysilazane. To protect the sandstone, the SiON protective layer and the commonly used protective materials—acrylic resin and polydimethylsiloxane—are applied. When compared to sandstone treated with acrylic resin B72 and polydimethylsiloxane coatings, SiON-coated sandstone effectively reduces porosity and water absorption. Ageing tests have shown that the SiON-coated sandstone is effective in resisting crystalline damage from sodium sulfate. These thenardites can change shape during formation, allowing their widespread distribution in different locations in the sandstone. The surface thenardite of the SiON-treated samples was smaller than that of the polydimethylsiloxane and acrylic resin B72-treated samples, while the untreated samples were flaky with obvious dehydration characteristics.

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