Ray tracing with depth buffered display

Details Ray tracing with depth buffered display Ray tracing with depth buffered display

2005-08-11

2008-10-21

Wu, Xiao M. (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

Reexamination Certificate

active

07439973

ABSTRACT:
An image that includes ray traced pixel data and rasterized pixel data is generated. A synergistic processing unit (SPU) uses a rendering algorithm to generate ray traced data for objects that require high-quality image rendering. The ray traced data is fragmented, whereby each fragment includes a ray traced pixel depth value and a ray traced pixel color value. A rasterizer compares ray traced pixel depth values to corresponding rasterized pixel depth values, and overwrites ray traced pixel data with rasterized pixel data when the corresponding rasterized fragment is “closer” to a viewing point, which results in composite data. A display subsystem uses the resultant composite data to generate an image on a user's display.

REFERENCES:
patent: 6057847 (2000-05-01), Jenkins
patent: RE38078 (2003-04-01), Duluk, Jr.
patent: 2003/0160788 (2003-08-01), Buehler
Minor et al., “Terrain Rendering Engine (TRE): Cell Broadband Engine Optimized Real-time Ray-caster,” IBM Corporation, May 2005.
Szenberg et al., “An Algorithm for the Visualization of a Terrain with Objects,” Computer Graphics and Image Processing , 1997, Proceedings, Oct. 1997, pp. 103-110.
Bhalerao et al., “Fast re-rendering of volume and surface graphics by depth, color, and opacity buffering,” Medical Image Analysis, Dec. 1998, pp. 235-251.
Minor et al., “IBM: Terrain Rendering Engine (TRE),” IBM Corporation, May 2005.
GameTomorrow blog, Jul. 2005, retrieved from gametomorrow.com.

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