Lapped multiple bases algorithms for still image compression without blocking effect.

Debrunner, V E; Chen, L; Li, H J · IEEE Trans Image Process · 1997

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Abstract

We describe a system for still image compression that uses several transform sets in a multiple bases realization algorithm. Our algorithms reduce the number of encoded transform coefficients 20% beyond DCT-only compression. We extend these algorithms to use several newly developed lapped orthogonal transform (LOT) bases, resulting in useful algorithms for low bit rate (high compression) operation without blocking effect.