Image interpolation system

Details Image interpolation system Image interpolation system

1980-04-28

1981-12-01

Bookbinder, Marc E.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358138, 364515, H04N 100, H04N 712

Patent

active

043039472

ABSTRACT:
Analog image data pixels are sampled and held to produce a box car wave representative of the image data. Wave height differences are bridged by linear interpolation, with frequency enhancement imposed at the bridge junctures. The modified image wave is thresholded and sampled at a multiple of the original frequency to provide an image pixel stream comprised of both original image pixels having one or more interpolated image pixels therebetween. One or more intermediate image lines are interpolated by comparing binary image data, portions of which may be interpolated, on a pixel by pixel or multiple pixel basis one line pair at a time. The pixel comparison produces an address used to identify a specific image pixel pattern from multiple image pixel patterns stored in memory. The image pixel pattern taken from memory is used to form the interpolated intermediate line or lines.

REFERENCES:
patent: 2921124 (1960-01-01), Graham
patent: 3051787 (1962-08-01), Parks
patent: 3795763 (1974-03-01), Golding et al.
patent: 3830965 (1974-08-01), Beaudette
patent: 3849592 (1974-11-01), Rosenheck

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