Image processing apparatus and method thereof for adding a prede

Details Image processing apparatus and method thereof for adding a prede Image processing apparatus and method thereof for adding a prede

1993-09-24

1996-09-17

Facsimile and static presentation processing

Facsimile

Recording apparatus

358401, 355201, 347129, H04N 129, H04N 100, G03G 2100, G01D 1514

Patent

active

055574165

ABSTRACT:
When a predetermined pattern (e.g. a pattern indicating the serial number of a copying machine) is added on an image formed on a recording paper, the image formation apparatus suppresses the appearance of fog by the addition of a predetermined pattern in the vicinity of the image. More particularly, a control circuit, which inputs and processes an image signal, estimates the leading and ending edge positions of the recording paper with respect to the transferring direction. The edge which is perpendicular to the transferring direction of the recording paper is determined based on a signal obtained from an ITOP generation circuit and a BD detector. Accordingly, an effective area for image formation on the recording paper is obtained and a modulation amount for adding the predetermined pattern is controlled in accordance with the position on the recording paper at which the predetermined pattern is added.

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patent: 5430525 (1995-07-01), Ohta et al.
patent: 5457540 (1995-10-01), Kajita

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