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Veiga, Rosário (author), Faria, Paulina (author), van Hees, R.P.J. (author), Stefanidou, Maria (author), Maravelaki, Pagona Noni (author), Ioannou, Ioannis (author), Theodoridou, Magdalini (author), Bokan Bosilijkov, Violeta (author), Bicer-Simsir, Beril (author)Renders and plasters have significant functions in buildings. Their functionality is closely related to their properties, which depend on the mortar itself, the application technology, the interaction with the environment and the substrate. There are many basic characteristics that influence the performance of renders and plasters; however,...journal article 2023
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Wen, Minzhen (author), Guo, Baotong (author), Chen, Shanghuan (author), Hu, X. (author), Fan, Xuejun (author), Zhang, Kouchi (author), Fan, J. (author)The (Ca, Sr) AlSiN₃:Eu²⁺(CSASN:Eu) red phosphor is widely used to improve color rendering of high-power phosphor-converted lighting diode (pc-WLED), but it is always unstable under high temperature and high humidity environments. Therefore, the studies on the temperature and humidity resistance of red phosphors and their aging mechanism have...conference paper 2023
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Guo, Jerry Jinfeng (author)Realism has always been a major goal in visual content creation - from oil painting to motion pictures, from graphic arts to scientific data visualization. Computer graphics creates a virtual reality with digital representations. Trading between accuracy and speed, realistic rendering either creates photorealistic renders that follow strict...doctoral thesis 2022
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CHEN, ENPU (author)In inspection and display scenarios, reconstructing and rendering the entire surface of a building is a critical step in presenting the overall condition of the building. In building reconstruction, most works are based on point clouds because of their enhanced availability. In recent years, neural radiance fields (NeRF) have become a common...master thesis 2022
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Romeu Huidobro, Jorge (author)Direct lighting calculation is an essential part of photorealistic rendering. Standard importance sampling techniques converge slowly in scenes where a light source is only visible through small openings as visibility is not considered. This problem is often addressed by manually placing light portals, marking the openings to the light. However,...bachelor thesis 2022
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Makridis, Pavlos (author)Indirect illumination is an essential part of realistic computer-generated imagery. However, accurate calculation of indirect illumination comes at high compute costs. To this end, we replace lengthy indirect illumination paths by employing an ambient light cache based on photon mapping principles. By only performing cache queries after a...bachelor thesis 2022
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Đào, Tan (author)Spectral Monte-Carlo rendering can simulate advanced light phenomena (e.g., dispersion, caustics, or iridescence), but require significantly more samples compared to trichromatic rendering to obtain noise-free images. Therefore, its progressive variant typically exhibits an extreme amount of chromatic noise in early renders. To that end, we...bachelor thesis 2022
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Wei Chen, Chen (author), Cao, Dunhua (author), Dong, Yongjun (author), Xiong, Jingkang (author), Trofimov, Yuri (author), Lishik, Sergey (author), Zhang, Kouchi (author), Fan, J. (author)Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sup>3+</sup> (YAG:Ce<sup>3+</sup>) single crystal phosphor (SCP) exhibits high internal quantum efficiency (IQE) and excellent thermal conductivity and stability. Such properties are promising in high-power laser-excited white lighting applications. However, YAG:Ce<sup>3+</sup> SCP usually shows...journal article 2022
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Van Damme, Nathan (author), Ratz, Raphael (author), Marchal Crespo, L. (author)Sensorimotor impairments of the hand after stroke can drastically reduce the ability to perform activities of daily living. Recently, there has been an increased interest in minimally supervised and unsupervised rehabilitation to increase therapy dosage and to complement conventional therapy. Several devices have been developed that are...conference paper 2022
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Özen, Özhan (author), Buetler, Karin A. (author), Marchal Crespo, L. (author)BACKGROUND: Current robot-aided training allows for high-intensity training but might hamper the transfer of learned skills to real daily tasks. Many of these tasks, e.g., carrying a cup of coffee, require manipulating objects with complex dynamics. Thus, the absence of somatosensory information regarding the interaction with virtual objects...journal article 2022
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Clausen, O. (author), Chen, Y. (author), Fuhrmann, A. (author), Marroquim, Ricardo (author)Simulating light–matter interaction is a fundamental problem in computer graphics. A particular challenge is the simulation of light interaction with rough surfaces due to diffraction and multiple scattering phenomena. To properly model these phenomena, wave-optics have to be considered. Nevertheless, the most accurate BRDF models, including...journal article 2022
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- Ronner, E.I. (author) book chapter 2022
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Kulhánek, Jonáš (author), Derner, Erik (author), Sattler, Torsten (author), Babuska, R. (author)Novel view synthesis is a long-standing problem. In this work, we consider a variant of the problem where we are given only a few context views sparsely covering a scene or an object. The goal is to predict novel viewpoints in the scene, which requires learning priors. The current state of the art is based on Neural Radiance Field (NeRF), and...conference paper 2022
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Müller, Jan U. (author), Weinmann, M. (author), Klein, Reinhard (author)We propose an efficient and GPU-accelerated sampling framework which enables unbiased gradient approximation for differentiable point cloud rendering based on surface splatting. Our framework models the contribution of a point to the rendered image as a probability distribution. We derive an unbiased approximative gradient for the rendering...conference paper 2022
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Zeilstra, Mika (author)This paper accelerates the rendering of diffusion curves using the ray tracing cores found on modern NVIDIA graphics cards using the method described by Bowers et al. [Bowers, Leahey and Wang 2011]. This method approximates the final result of the Poisson equation and in this paper is accelerated using Optix and dedicated ray tracing hardware....bachelor thesis 2021
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Guo, Jerry Jinfeng (author), Eisemann, E. (author)Numerical integration is fundamental in multiple Monte Carlo rendering problems. We present a sample reweighting scheme, including underlying theory, and analysis of numerical performance for the integration of an unknown one-dimensional function. Our method is simple to implement and builds upon the insight to link the weights to a function...journal article 2021
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Cao, Yixing (author), Chen, Shanghuan (author), Li, Yutong (author), Du, Yunjia (author), Chen, Wei (author), Fan, J. (author), Zhang, Kouchi (author)The emission spectra of high color rendering phosphors, mixed with the yttrium aluminium garnet, silicon based oxynitride and nitride based phosphors, were predicted by the Lambert-Beer theory and back propagation neural network (BP NN). Firstly, the modified Lambert-Beer model was used to calculate the proportional coefficient of the...journal article 2021
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Vermeer, Jop (author), Scandolo, L. (author), Eisemann, E. (author)Ambient occlusion (AO) is a popular rendering technique that enhances depth perception and realism by darkening locations that are less exposed to ambient light (e.g., corners and creases). In real-time applications, screen-space variants, relying on the depth buffer, are used due to their high performance and good visual quality. However, these...journal article 2021
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Özen, Özhan (author), Buetler, Karin A. (author), Marchal Crespo, L. (author)Despite recent advances in robot-assisted training, the benefits of haptic guidance on motor (re)learning are still limited. While haptic guidance may increase task performance during training, it may also decrease participants' effort and interfere with the perception of the environment dynamics, hindering somatosensory information crucial...journal article 2021
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Vermeer, Jop (author)Ambient occlusion is a popular rendering technique that creates a greater sense of depth and realism, by darkening places in the scene that are less exposed to ambient light (e.g., corners and creases). Ambient occlusion measures how geometrically occluded each point in the scene is and modulates the ambient light accordingly. In real-time...master thesis 2020