Image forming apparatus

Details Image forming apparatus Image forming apparatus

1994-11-30

1999-06-29

Lee, Thomas D.

Facsimile and static presentation processing

Natural color facsimile

Image reproduction

358504, 380 3, 382135, 399366, H04N 146

Patent

active

059176199

ABSTRACT:
The present invention provides a color tone detection sensor for detecting the tone of a color actually printed, a color conversion processing section for executing color conversion to inputted image data, and a system controller for executing color tone detection prior to an operation for detecting a copy-inhibited document in a copy-inhibited document detecting section, causing the copy-inhibited document detecting section to execute the operation for detecting a copy-inhibited document using image data subjected to color conversion in the color conversion processing section when the detected color tone is not a specified one, or causing the copy-inhibited document detecting section to execute the same operation using the inputted image data when the detected color tone is a specified one.

REFERENCES:
patent: 4586811 (1986-05-01), Kubo et al.
patent: 4587536 (1986-05-01), Saito et al.
patent: 5216724 (1993-06-01), Suzuki et al.
patent: 5321470 (1994-06-01), Hasuo et al.
patent: 5363202 (1994-11-01), Udagawa et al.
patent: 5424807 (1995-06-01), Ohmura
patent: 5440409 (1995-08-01), Sugano et al.

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