Image processing method and apparatus for adding identifying inf

Details Image processing method and apparatus for adding identifying inf Image processing method and apparatus for adding identifying inf

1995-09-25

1997-08-26

Rogers, Scott A.

Facsimile and static presentation processing

Natural color facsimile

Image reproduction

358530, 358401, 358450, H04N 1387, H04N 150

Patent

active

056615744

ABSTRACT:
An image processing apparatus for color image formation that adds a specific pattern to identify the apparatus more reliably, to image information. For example, in a bit array of a printer's identification number in binary representation, if one bit has a value "0", the value of input multivalued image data in a M-th line in a subscanning direction is decremented by "30". On the other hand, if the bit value is "1", the data of the input multivalued image data is incremented by "30". If the data value has been incremented by "30" in the M-th line, data value at a position immediately below the position where the data valued has been incremented (decremented) in the next (M+1)-th line is decremented by "30", while if the data value has been decremented by "30" in the M-th line, data value at a position immediately below the position where the data value has been incremented (decremented) in the next (M+1)-th line is incremented by "30".

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Komatsu, et al., "A Proposal on Digital Watermark in Document Image Communication and Its Application to Realizing a Signature", Electronics and Communications in Japan, Part 1, vol. 73, No. 5, 1990.

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