Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2011-08-09
2011-08-09
Popovici, Dov (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003060, C358S534000, C358S536000, C358S003030
Reexamination Certificate
active
07995247
ABSTRACT:
The present invention provides a method of generating information embedded halftone screen code. According to this method, massive digital information can be stored through printing on at least one type of print media. The information embedded can be read and recognized simply and reliably. The quality of the images will not be reduced after information embedded. The information printed on the media includes a predetermined array of halftone dots with different morphology including physical and geometrical characteristics, which forms the computer codes to embed information into printed content. The advantages of this invention are: the maximum similarity value can be reduced to under the threshold value according to this method; the recognition performance of the halftone screen code can be improved; and robustness can still be maintained at a high level even though the paper is defected or polluted.
REFERENCES:
patent: 3598993 (1971-08-01), Kaufer et al.
patent: 2003/0020678 (2003-01-01), Ozawa et al.
patent: 2004/0013284 (2004-01-01), Yu
patent: 2006/0170974 (2006-08-01), Wang et al.
Matthias Scholl P.C.
Popovici Dov
Scholl Matthias
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