Methods for reducing quantization error in hierarchical decompos

Details Methods for reducing quantization error in hierarchical decompos Methods for reducing quantization error in hierarchical decompos

1989-12-22

1991-05-28

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

G06K 936

Patent

active

050201204

ABSTRACT:
Methods to reduce the quantization error in the higher spatial resolution digital image signals of a hierarchical decomposition and reconstruction scheme are disclosed. The quantization errors in the high spatial resolution digital image signals are reduced by modifying the low spatial resolution digital image signals in a way that can produce only small errors in the low spatial resolution digital image signal. The small errors in the low spatial resolution digital image signal are reduced by utilizing an improved reconstruction method.

REFERENCES:
patent: 4193096 (1980-03-01), Stoffel
patent: 4682869 (1987-07-01), Itoh et al.
patent: 4809350 (1989-02-01), Shimoni et al.
patent: 4868764 (1989-09-01), Richards

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