Real-Time Occlusion Culling with a Lazy Occlusion Grid

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Date
2001
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
We present a new conservative image-space occlusion culling method to increase the rendering speed of very large general scenes on today's available hardware without time-expensive preprocessing. The method is based on a low-resolution grid upon a conventional z-buffer. The occlusion information in the grid is updated in a lazy manner. In comparison to related methods this significantly reduces the number of pixels that have to be read from the z-buffer. The grid allows fast decisions if an object is occluded or potentially visible. It is used together with a bounding volume hierarchy that is traversed in a front-to-back order and which allows to cull large parts of the scene at once. A special front-to-back traversal is used if no pixel-level query for the furthest z-value of an image area is available. We show that the method works efficiently on today's available hardware and we compare it with related methods.
Description

        
@inproceedings{
:10.2312/EGWR/EGWR01/217-221
, booktitle = {
Eurographics Workshop on Rendering
}, editor = {
S. J. Gortle and K. Myszkowski
}, title = {{
Real-Time Occlusion Culling with a Lazy Occlusion Grid
}}, author = {
Hey, Heinrich
and
Tobler, Robert F.
and
Purgathofer, Werner
}, year = {
2001
}, publisher = {
The Eurographics Association
}, ISSN = {
1727-3463
}, ISBN = {
3-211-83709-4
}, DOI = {
/10.2312/EGWR/EGWR01/217-221
} }
Citation