Apparatus for producing and reproducing embedded pattern

Details Apparatus for producing and reproducing embedded pattern Apparatus for producing and reproducing embedded pattern

1981-07-08

1983-08-23

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358293, 358280, 382 16, H04N 100

Patent

active

044007370

ABSTRACT:
Apparatus for producing and reproducing embedded patterns in which a character or the like including a pattern which is not observable macroscopically can be differentiated from the other formats microscopically. An input unit reads a normal original image pattern utilizing a raster scanning system. In the apparatus for producing the format, a processing unit includes a gate which receives a signal from the input means and passes or blocks the signal in accordance with the desired embedded pattern. An output unit records the image using the raster scanning system. In the apparatus for reproducing the format, a processing unit includes a gate which blocks or passes an input signal depending on whether or not it contains the embedded pattern.

REFERENCES:
patent: 4229768 (1980-10-01), Kurahayashi

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