METHODS FOR REDUCING THE BLOCKING ARTIFACT OBSERVED IN IMAGES WHICH HAVE BEEN COMPRESSED USING TRANSFORM CODING ANDVECTOR QUANTIZATION

Award Information
Agency: National Science Foundation
Branch: N/A
Contract: N/A
Agency Tracking Number: 14373
Amount: $250,000.00
Phase: Phase II
Program: SBIR
Awards Year: 1992
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Optivision
1477 Drew Avenue, Suite 102, Davis, CA, 95616
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr. Paul M. Farrelle
 Dir. Of Compression Technology
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THIS IS A PROPOSAL TO STUDY TECHNIQUES TO REDUCE THE BLOCKING ARTIFACT WHICH IS OBSERVED WHEN CODING IMAGES USINGEITHER TRANSFORM TECHNIQUES OR VECTOR QUANTIZATION (VQ). THIS ARTIFACT, WHICH WE CALL THE TILE EFFECT, IS OBSERVED ESPECIALLY IN SMOOTH REGIONS OF A RECONSTRUCTED IMAGE AFTER MODERATE TO HIGH COMPRESSION. OUR APPROACH TO SOLVE THIS PROBLEM LIES IN A FUNDAMENTALLY DIFFERENT WAY OF MODELLING THE IMAGE AS THE SUM OF TWO SOURCES. THIS LEADS IN A VERY NATURAL WAY TO A REDUCTION OF THIS TILE EFFECT. THIS RESEARCH WILL ADDRESS IMAGE DATA COMPRESSION ALGORITHM DESIGN WITHIN THIS FRAMEWORK AND THEN CONCENTRATE ON TECHNIQUES TO ACHIEVE VERY HIGH COMPRESSION RATIOS WHILE REDUCING THE TILE EFFECT. WITH A SUCCESSFUL COMPLETION OF THIS RESEARCH WE CAN EXPECT TO SEE MORE EFFICIENT IMAGING SYSTEMS IN THE SENSE OFREDUCED STORAGE AND TRANSMISSION TIME AND/OR IMPROVED IMAGE QUALITY.

* information listed above is at the time of submission.

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