Method for fast data compression of half tone images with the us

Details Method for fast data compression of half tone images with the us Method for fast data compression of half tone images with the us

1993-05-25

1995-09-26

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

358429, 358430, 358432, H04N 141, H04N 1415

Patent

active

054538432

ABSTRACT:
Data in the form of a sequence of data bits is compressed by separating the data into groups of data bits. A value is derived for the respective groups from the data contained therein. When a group has a derived value equal to the derived value of at least its adjacent group, a pre-assigned control code is used as compressed data. Such compressed data is representative of the data in consecutive groups of data having the same derived value.

REFERENCES:
patent: 4409623 (1983-10-01), Kobayashi et al.
patent: 4679094 (1987-07-01), Rutherford et al.
patent: 4943869 (1990-07-01), Horikawa et al.
patent: 5072302 (1991-12-01), Ronchetti et al.
patent: 5148292 (1992-09-01), Kutaragi
patent: 5163104 (1992-11-01), Ghosh et al.

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