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- 摘要
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- 实验方案
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[IEEE 2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4) - Trebic, Czech Republic (2018.9.18-2018.9.20)] 2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4) - The Floodlighting Design System Based on the Object's Daytime Photography
摘要： The article presents a solution to the problem of work and time consuming of the objects floodlighting projects creation. Currently, the only technically correct methods for creating such projects are a three-dimensional computer simulation using photometric files of luminaires or field trials using real equipment. Both of these methods have their advantages, but also many disadvantages. Among architects, in turn, a popular method of floodlighting designing is graphic processing of daytime or evening images objects. The method is relatively fast and it gives photorealistic effects but it is technically incorrect. An architect or graphic designer creates a picture that is attractive to the eye, but usually has nothing to do with reality. This is due to the fact that the lighting parameters of both lighting equipment and analyzing this type of project in terms of technology are not taken into account. The article presents a solution to this problem. It describes a system created especially for this purpose based on a dedicated computer application that allows simulation of the object floodlighting using its daily photograph. This is technically correct simulation, because it uses photometric files of luminaires. The system allows correction of basic photometric parameters: editing of photometric files, luminous flux, light in different directions, color temperature and the use of color filters. The computer application also enables photo editing, geometric correction, measurement and defining reflection and transmission properties of materials from which the object is actually built. Full lighting analysis is also possible and is based on luminance and illuminance distributions generated in the false color scale and measurements in points and selected areas. The advantages, disadvantages and limitations of the developed system are presented.
关键词： luminance distribution,visualization,floodlighting,advanced lighting simulation,lighting design
更新于2025-09-23 15:21:21
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[ACM Press SIGGRAPH Asia 2017 Posters - Bangkok, Thailand (2017.11.27-2017.11.30)] SIGGRAPH Asia 2017 Posters on - SA '17 - VR lighting design
摘要： Lighting design is a crucial process in video games, animation, interior design, and some other fields. Current lighting design systems support only direct lighting paradigm which requires fine-tuning each light’s parameters to achieve a global lighting effect. In this study, we developed an integrated lighting design system which comprises direct, indirect, and inverse lighting design paradigms in VR environment. The system provides designers with an immersive, intuitive, and effective way of lighting design.
关键词： Lighting design,Computer-aided design,Virtual reality,VR,Inverse lighting
更新于2025-09-19 17:15:36
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Light Shapes
摘要： In computer graphics, illuminating a scene is a complex task, typically consisting of cycles of adjusting and rendering the scene to see the effects. We propose a technique for visualization of light as a tensor field via extracting its properties (i.e., intensity, direction, diffuseness) from (virtual) radiance measurements and showing these properties as a grid of shapes over a volume of a scene. Presented in the viewport, our visualizations give an understanding of the illumination conditions in the measured volume for both the local values and the global variations of light properties. Additionally, they allow quick inferences of the resulting visual appearance of (objects in) scenes without the need to render them. In our evaluation, observers performed at least as well using visualizations as using renderings when they were comparing illumination between parts of a scene and inferring the final appearance of objects in the measured volume. Therefore, the proposed visualizations are expected to help lighting artists by providing perceptually relevant information about the structure of the light field and flow in a scene.
关键词： perception,visualization,lighting design,Light transport
更新于2025-09-19 17:15:36
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OLED Lighting: The Differentiation Challenge
摘要： OLED lighting trails inorganic LEDs in almost every market segment, and therefore has to play catch-up. OLED displays are likely to lose this battle in the short and medium term, given that OLED displays are both under-performing and over-priced. The endgame, however, is promising because customers will buy OLED devices if the cost and performance gap substantially narrows. Lighting companies have little choice but to hedge their bets and stay the course with OLEDs or else risk losing out in the decades to come. In the meantime, these companies need to create stepping stones that generate at least limited cash flow and allow them to accumulate production/marketing experience. In fact, substantial innovation and pressure are building up in the value chain, which will ultimately enable a cost reduction in OLED lighting.
关键词： performance gap,OLED lighting,LED lighting,design attributes,cost reduction
更新于2025-09-19 17:13:59
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What Color Does the Consumer See? Perceived Color Differences in Plastic Products in an LED-Lit Environment
摘要： To attract customers and increase market opportunities, retailers frequently use lighting to highlight the color of their products. However, di?erences between perceived and actual color, triggered by display lighting, can motivate buyers to discard products after purchase. Few studies have been reported on di?erences in perceived color, caused by LEDs. This study focuses on two correlated color temperatures (2800 K, 4000 K) and illuminance levels (500 lx, 1500 lx) to create four LED-lit environments, and measures the di?erences in the color perceived by 20 observers on acrylonitrile–butadiene–styrene (ABS) plastics, with di?erent surfaces, under these four environments. The results reveal that correlated color temperature results in larger perceived di?erences in color than illuminance, and the e?ects of LED light sources on green and yellow ABS plastic products are more obvious than their e?ects on red and blue products. One possible reason for this can be attributed to the visual sensitivity e?ect of human eyes. The results of this study can serve as a reference for designers fabricating ABS plastic products for practical lighting applications, and improving the role of LED lighting in sustainable development.
关键词： Light-emitting diode (LED),Acrylonitrile–butadiene–styrene (ABS) plastic,Perceived color di?erence,Lighting design
更新于2025-09-16 10:30:52
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[IEEE 2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4) - Trebic, Czech Republic (2018.9.18-2018.9.20)] 2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4) - Evaluation of Lighting Design Based on Computer Simulation
摘要： Photorealistic computer simulations are now a popular method of lighting design. They are usually associated with the illumination of objects, but they are also successfully used in interior lighting, especially representative lighting. The problem of the verifiability of the tool is often discussed and in which cases only visualization without purely analytical calculations can be used to evaluate the lighting design. The article presents both subjective and objective studies of conformity of a project made using photorealistic visualization and its subsequent implementation. Subjectively it means based on the comparison of simulation images made with different accuracy, with post-implementation photographs of these projects, objectively – on the basis of measurements of the luminance of the completed project and their reference to distributions previously generated by computer. The field measurements carried out as well as surveys have clearly shown that computer simulations in the form of raster images are a reliable design tool in the hands of a lighting designer. The future of the lighting design is also presented.
关键词： advanced lighting simulation,lighting design,virtual reality of lighting,floodlighting
更新于2025-09-10 09:29:36