Marker dot detecting device for color image recording apparatus

Details Marker dot detecting device for color image recording apparatus Marker dot detecting device for color image recording apparatus

1992-05-13

1994-11-08

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358453, 358537, 358538, 382 30, 382 34, H04N 1387, H04N 140, H04N 146

Patent

active

053632125

ABSTRACT:
A marker dot detecting device for a color image recording apparatus such as a color copying machine, color facsimile, or color printer. The marker dot detecting device includes a marker dot detecting unit for detecting a marker dot by detecting a plane size of binary image data having a preset marker color. Further, the marker dot detecting unit includes a template mask unit having a first template mask in a predetermined first size and a second template mask in a predetermined second size larger than the first size, the second template mask including the first template mask. The template mask unit outputs a marker dot detecting signal when a detected size of the marker dot is larger than that of the first template mask and smaller than that of the second template mask.

REFERENCES:
patent: 4538182 (1985-08-01), Saito
patent: 5016096 (1991-05-01), Matsunawa et al.
patent: 5140440 (1992-08-01), Sasaki
patent: 5241609 (1993-08-01), Hasebe et al.

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