Image reduction method

Details Image reduction method Image reduction method

1986-03-17

1987-12-08

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

340731, 382 47, H04N 718

Patent

active

047121408

ABSTRACT:
A binary image is reduced in size by a method including the steps of: storing the image in bit sequence; dividing the image into transposable blocks; transposing by look up table, for each block having any nonzero data, each group of 6 bits along a first axis to a group of 5 bits; transposing by look up table, for each block having any nonzero data, each group of 6 bits along a second axis to a group of 5 bits; storing said transposed blocks.

REFERENCES:
patent: 3289164 (1966-11-01), Rabinow
patent: 4280143 (1981-07-01), Judd
patent: 4468688 (1984-08-01), Gabriel et al.
patent: 4528693 (1985-07-01), Pearson et al.
Boberg--Regridding Method--IBM Tech Discl. Bull., vol. 13, #8, Jan. 1971, pp. 2291-2293.
Liao--Table Look-up Realization of Digital Filtering--Xerox Discl. Jour., vol. 5, #1-Jan./Feb. 1980, p. 115.

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