Alternate line interpolation method and apparatus

Details Alternate line interpolation method and apparatus Alternate line interpolation method and apparatus

1983-08-26

1986-02-18

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358136, H04N 712

Patent

active

045716323

ABSTRACT:
A method and apparatus are provided for data compression in a digital facile document transmission system. In accordance with the method, only alternate scan lines are transmitted, i.e., every other line is deleted in transmission, and at the receiver, the missing scan lines are interpolated from the transmitted data. This compression technique provides a fixed compression ratio of 2 to 1 regardless of the complexity of the input document. The interpolation method relies on comparing, for each picture element to be interpolated, the colors of one or more pairs of adjacent picture elements of the transmitted scan lines and making a decision as to the color of the picture element to be interpolated on this basis.

REFERENCES:
patent: 3347981 (1967-10-01), Kagan et al.
patent: 3804975 (1974-04-01), Abe
patent: 3956578 (1976-05-01), de Loye et al.
patent: 4193092 (1980-03-01), Stoffel
patent: 4316222 (1982-02-01), Subramaniam

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