Image encoding method and an image encoder wherein a one-dimensi

Details Image encoding method and an image encoder wherein a one-dimensi Image encoding method and an image encoder wherein a one-dimensi

1997-02-21

1999-09-14

Coles, Edward L.

Image analysis

Image compression or coding

Adaptive coding

382234, 382248, 382251, 358432, 358433, 348408, 348411, G06T 900

Patent

active

059534605

ABSTRACT:
An image signal is transformed by at least two different mathematical transformations to obtain at least two different transformed signals. A selected one of the transformed signals is quantized and coded, the selection being made so as to minimize the size of the coded data. The selection is made by comparing the energy convergence rates of the transformed signals, or by quantizing all of the transformed signals and comparing the amounts of non-zero quantized data, or by quantizing and coding all of the transformed signals and comparing the coded data sizes directly.

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