Level of detail based occlusion culling for dynamic scenes

Grundhöfer, Anselm; Brombach, Benjamin; Scheibe, Robert; Fröhlich, Bernd

doi:10.1145/1101389.1101396

Cited by 8 publications

(4 citation statements)

References 11 publications

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“…The identification of hidden objects from the camera's point of view for each frame every time the camera or an object moves is its main drawback. This technique is widely used in urban environments [COCSD03, GBSF05] but it is not suited to urban flights in real time. In its native form, it is not well suited to the treatment of mobile elements.…”

Section: Related Workmentioning

confidence: 99%

BqR‐Tree: A Data Structure for Flights and Walkthroughs in Urban Scenes with Mobile Elements

Pina

Serón

Cerezo³

2010

Computer Graphics Forum

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BqR-Tree, the data structure presented in this paper is an improved R-Tree data structure based on a quadtree spatial partitioning which improves the rendering speed of the usual R-trees when view-culling is implemented, especially in urban scenes. The city is split by means of a spatial quadtree partition and the block is adopted as the basic urban unit. One advantage of blocks is that they can be easily identified in any urban environment, regardless of the origins and structure of the input data. The aim of the structure is to accelerate the visualization of complex scenes containing not only static but dynamic elements. The usefulness of the structure has been tested with low structured data, which makes its application appropriate to almost all city data. The results of the tests show that when using the BqR-Tree structure to perform walkthroughs and flights, rendering times vastly improve in comparison to the data structures which have yielded best results to date, with average improvements of around 30%.

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Section: Related Workmentioning

confidence: 99%

BqR‐Tree: A Data Structure for Flights and Walkthroughs in Urban Scenes with Mobile Elements

Pina

Serón

Cerezo³

2010

Computer Graphics Forum

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“…On the other hand, static LOD techniques have also been used as tools for occlusion culling algorithms. Simplified versions of occluders have been used to reduce the computation for occlusions [77,56].…”

Section: Integrating View-dependent Lod and Visibility Cullingmentioning

confidence: 99%

Interactive View-Dependent Rendering over Networks

Zheng

Prakash

Chan

2008

IEEE Trans. Visual. Comput. Graphics

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For a client-server based view-dependent rendering system, the overhead of view-dependent rendering and the network latency are major obstacles in achieving interactivity. In this paper, we first present a multiresolution hierarchy traversal management strategy to control the overhead of view-dependent rendering for low-capacity clients. Then we propose a predictive parallel strategy to overcome the network latency for client-server based view-dependent multiresolution rendering systems. Our solution is to make the client process and the server process run in parallel, using the rendering time to cover the network latency. For networks with long round-trip times, we manage to overlap the network latency for one frame with the rendering time for multiple frames. View-parameters prediction is incorporated to make the parallelism of the client and the server feasible. In order to maintain an acceptable view-dependent rendering quality in the network environment, we develop a synchronization mechanism and a dynamic adjustment mechanism to handle the transient network slowdowns and the changes of the network condition. Our experimental results, in comparison with the sequential method, show that our predictive parallel approach can achieve an interactive frame rate while keeping an acceptable rendering quality for large triangle models over networks with relatively long round-trip times.

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“…The latter can be very useful for static background geometries which are usually seen from a very narrow field of view. There are some previous works that integrate occlusion culling and view-dependent rendering such as [1,7,13,12,35]. [1] proposed a hybrid technique which combines LOD rendering with visibility.…”

Section: Introductionmentioning

confidence: 99%

“…Quick-VDR relies on an out-of-core algorithm to compute a CHPM that performs a hierarchical cluster decomposition and simplification. Grundhofer et al [13] combined LOD-based rendering with an efficient multi-pass occlusion culling algorithm. LODs are generated off-line as well as the slicing of the high polygon count objects.…”

Section: Introductionmentioning

confidence: 99%

Surface Decimation by Scene Contents

Castelló¹

2017

IJCA

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Today, there is a wide variety of devices ranging from PC's, game consoles, up to smartphones and tablets. These computing devices have major differences in performance and make mesh decimation still active in the field of research. One of the latest topics in the area has been to create simplification algorithms considering visual similarity. However, the full potential of most visual simplification algorithms has yet to be tapped, especially in soft real-time interactive computer simulations such as video games and virtual reality environments. In this paper, a new framework, in which occlusion and visibility are exploited intensively, is introduced in order to simplify models more accurately by taking into account their context in actual 3D scenes. Static background elements are simplified by considering the effect of their surroundings, decreasing the polygon count in the surfaces partially hidden by others. In addition, by allowing users to perform an optimal placement of the cameras in the scene, simplification in regions not seen from such viewpoints is dramatically increased. Dynamic elements, such as characters, accomplish a higher level of simplification since these elements which often consist of multiple meshes, for example, clothes, those resulting from the design stage. These meshes usually cover some regions of the base mesh and are used as occluders in order to increase the amount of polygon reduction in dynamic elements, barely losing image quality.

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Level of detail based occlusion culling for dynamic scenes

Cited by 8 publications

References 11 publications

BqR‐Tree: A Data Structure for Flights and Walkthroughs in Urban Scenes with Mobile Elements

BqR‐Tree: A Data Structure for Flights and Walkthroughs in Urban Scenes with Mobile Elements

Interactive View-Dependent Rendering over Networks

Surface Decimation by Scene Contents

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