A CAVE system for interactive modeling of global illumination in car interior

Dmitriev, Kirill; Annen, Thomas; Krawczyk, Grzegorz; Seidel, Hans‐Peter

doi:10.1145/1077534.1077560

Cited by 16 publications

(8 citation statements)

References 30 publications

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“…Pertinent examples involving architectural and/or lighting design include navigation through hospital operating room designs [4], interior lighting design [5], and accurate global illumination from daylighting for car interiors [6]. Research in Spatially Augmented Reality (SAR) [7] addresses some of the physically-immersive criteria that we wish to leverage.…”

Section: Virtual Environmentsmentioning

confidence: 99%

A Spatially Augmented Reality Sketching Interface for Architectural Daylighting Design

Sheng

Yapo

Young

et al. 2011

IEEE Trans. Visual. Comput. Graphics

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Abstract-We present an application of interactive global illumination and spatially augmented reality to architectural daylight modeling that allows designers to explore alternative designs and new technologies for improving the sustainability of their buildings. Images of a model in the real world, captured by a camera above the scene, are processed to construct a virtual 3D model. To achieve interactive rendering rates, we use a hybrid rendering technique, leveraging radiosity to simulate the inter-reflectance between diffuse patches and shadow volumes to generate per-pixel direct illumination. The rendered images are then projected on the real model by four calibrated projectors to help users study the daylighting illumination. The virtual heliodon is a physical design environment in which multiple designers, a designer and a client, or a teacher and students can gather to experience animated visualizations of the natural illumination within a proposed design by controlling the time of day, season, and climate. Furthermore, participants may interactively redesign the geometry and materials of the space by manipulating physical design elements and see the updated lighting simulation.

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Section: Virtual Environmentsmentioning

confidence: 99%

A Spatially Augmented Reality Sketching Interface for Architectural Daylighting Design

Sheng

Yapo

Young

et al. 2011

IEEE Trans. Visual. Comput. Graphics

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“…Another way for real-time illumination in a natural environment is based on environment map compression [Sloan et al 2002], using spherical harmonics [Ramamoorthi and Hanrahan 2001] or wavelets [Ng et al 2003]. Both approaches typically assume distant lighting and an extension to spatially varying light is difficult: Localized low-frequency lighting is possible by using spherical harmonic gradients [Annen et al 2004]. A few methods include indirect lighting from point and spot lights [Hasan et al 2006] [Kristensen et al 2005] ].…”

Section: Previous Workmentioning

confidence: 99%

Consistent interactive augmentation of live camera images with correct near-field illumination

Grosch¹,

Eble

Müeller

2007

Proceedings of the 2007 ACM Symposium on Virtual Reality Software and Technology

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Inserting virtual objects in real camera images with correct lighting is an active area of research. Current methods use a high dynamic range camera with a fish-eye lens to capture the incoming illumination. The main problem with this approach is the limitation to distant illumination. Therefore, the focus of our work is a real-time description of both near -and far-field illumination for interactive movement of virtual objects in the camera image of a real room. The daylight, which is coming in through the windows, produces a spatially varying distribution of indirect light in the room; therefore a near-field description of incoming light is necessary. Our approach is to measure the daylight from outside and to simulate the resulting indirect light in the room. To accomplish this, we develop a special dynamic form of the irradiance volume for real-time updates of indirect light in the room and combine this with importance sampling and shadow maps for light from outside. This separation allows object movements with interactive frame rates (10 -17 fps). To verify the correctness of our approach, we compare images of synthetic objects with real objects.

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“…Precomputing global illumination using a Radiosity method [5] is not helpful either, as Radiosity is a directionally independent quantity, and is thus useless for illuminating BTFs. Precomputed Radiance Transfer methods [22,13,7] might be a reasonably alternative, but have never been applied to such models, yet.…”

Section: Interior Lightingmentioning

confidence: 99%

Applying Ray Tracing for Virtual Reality and Industrial Design

Wald

Dietrich

Benthin³

et al. 2006

2006 IEEE Symposium on Interactive Ray Tracing

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Figure 1: Several example screenshots from the presented framework, demonstrated on a complex Mercedes C-Class model: (a) The model consists of 320,000 Bézier patches and thousands of trimming curves that are directly and interactively ray traced without triangulation.(b) The model with ray traced shaders, e.g. glass and car paint, put into a surrounding scene made up of 200,000 triangles and a captured high dynamic range environment map. Note the accurate reflections, the refraction through the glass, and the smooth shadows from environment lighting. (c) The realistic interior appearance is achieved via a shader supporting bidirectional texture functions of measured samples from the corresponding real-world materials. (d) All these effects work together seamlessly, as can be seen on this view through the side window. At slightly reduced quality during interaction, these views can be rendered at 20, 14, 1.5, and 4.8 frames per second, respectively (640 × 480 pixels). ABSTRACTComputer aided design (CAD) and virtual reality (VR) are becoming increasingly important tools for industrial design applications. Unfortunately, there is a huge and growing gap between what data CAD engineers are working on, what rendering quality is needed by designers and executives to faithfully judge a design variant, and what rendering capabilities are offered by commonly available VR frameworks. In particular, existing VR systems cannot currently cope with the accuracy demanded by CAD engineers, nor can they deliver the photo-realistic rendering quality and reliability required by designers and decision makers.In this paper, we describe a ray tracing based virtual reality framework that closes these gaps. In particular, the proposed system supports direct ray tracing of trimmed freeform surfaces even for complex models of thousands of patches, allows for accurately simulating reflections and refraction for glass and car paint effects, offers support for direct integration of measured materials via bidirectional texture functions, and even allows for soft environmental lighting from high dynamic range environment maps. All of these effects can be delivered interactively, and are demonstrated on a real-world industrial model, a complete Mercedes C-Class car.

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A CAVE system for interactive modeling of global illumination in car interior

Cited by 16 publications

References 30 publications

A Spatially Augmented Reality Sketching Interface for Architectural Daylighting Design

A Spatially Augmented Reality Sketching Interface for Architectural Daylighting Design

Consistent interactive augmentation of live camera images with correct near-field illumination

Applying Ray Tracing for Virtual Reality and Industrial Design

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