USA flag logo/image

An Official Website of the United States Government

Exploiting the Context for High Volume Compression of Virtual Reality Data

Award Information

Department of Defense
Award ID:
Program Year/Program:
1996 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
6811 Kenilworth Avenue, Suite 306 Riverdale, MD 20737
View profile »
Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No
Phase 1
Fiscal Year: 1996
Title: Exploiting the Context for High Volume Compression of Virtual Reality Data
Agency / Branch: DOD / NAVY
Contract: N/A
Award Amount: $69,055.00


Virtual reality involves manipulation of massive quantities of three dimensional elevation and imagery data to render a realistic scene as the operator "flies" through. Visualization of the large areas needed in these simulations requires that the data be compressed to very low bit rates to make storage and transfer feasible. An important design requirement for consideration is that the data compression scheme needs to exhibit high fidelity for achieving realism. The primary objective of this Phase I effort is to develop real-time data compression algorithms to support virtual reality data handling. Our approach to achieving high volume data compression that preserves important structures in the data (e.g., discontinuities in an image for draping) makes use of wavelet based algorithms we have developed in a current Phase II SBIR effort supported by NASA. Specifically, we have shown that the generic wavelet compression scheme can be further improved by using information about the type of terrain in an image resulting in compression ratios close to 200:1. Based on our experience with fractals, wavelets and other compression methods, we find that the conjoint spatial- Fourier domain techniques such as wavelets are very effective both from a real-time computational point of view as well as an optimal data compression point of view. hi the case of "draping" a scene for virtual reality, the reduced resolution image set inherent in wavelet based compression will also aid in rendering a perspective image without accessing the entire compressed image.

Principal Investigator:

Dr. Srinivasan Raghavan

Business Contact:

Small Business Information at Submission:

Lnk Corp, Inc.
6811 Kenilworth Ave., Suite 30 Riverdale, MD 20737

Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No