Image processing apparatus

Details Image processing apparatus Image processing apparatus

1987-06-23

1990-02-20

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

3582621, 358426, 382 6, G06K 900

Patent

active

049033174

ABSTRACT:
An image processing apparatus includes a memory for storing image data, a loss-compression circuit for loss-compressing the image data, an expansion circuit for expanding the loss-compressed image data, and a difference circuit for calculating a difference between the original image data of the image memory and the expanded image data of the expansion circuit. A lossless compression circuit lossless-compresses the difference image data obtained by the difference circuit. A multiplexer multiplexes the loss-compressed image data output from the loss-compression circuit, with the lossless-compressed difference data obtained by the lossless-compression circuit.

REFERENCES:
patent: 4124870 (1978-11-01), Schatz et al.
patent: 4566127 (1986-01-01), Sekiya et al.
patent: 4568983 (1986-02-01), Bobick
patent: 4668995 (1987-05-01), Chen et al.
patent: 4682869 (1987-07-01), Itoh et al.
patent: 4776029 (1988-10-01), Shimura
patent: 4797741 (1989-01-01), Sato et al.

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