REVERSIBLE IMAGE COMPRESSION

LARRY BERNARD GRIM, University of Pennsylvania

Abstract

The area of image storage is becoming a major problem as higher resolution image devices come into use and as increased use is made of time sequences of images. Additionally, computer processing of images require that the original image be available. This dissertation examines algorithms which are reversible and can be used to encode images for storage. These algorithms make use of spatial redundancy found in the original in both the X and Y direction and also temporal redundancy between images in a sequence. It deviates from the standard approach to encoding in that it uses only computer length words and half words for the basic unit of storage and not the bit as was done by previous techniques. The images are first mapped into bit planes. The compression is then done on the individual bit planes. The use of bit planes provides significant advantage over compressing the original pixels.

Subject Area

Computer science

Recommended Citation

GRIM, LARRY BERNARD, "REVERSIBLE IMAGE COMPRESSION" (1980). Dissertations available from ProQuest. AAI8018551.
https://repository.upenn.edu/dissertations/AAI8018551

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