Image analysis – Applications
Reexamination Certificate
2006-06-20
2006-06-20
Mancuso, Joseph (Department: 2621)
Image analysis
Applications
Reexamination Certificate
active
07065227
ABSTRACT:
Watermark data that indicate additional information, such as copyright information, are optimized in accordance with the contents of object data, and the watermark data is embedded in image data. An image divider200divides image data Vi into image blocks Iij, and corresponds a selected basic pattern Phij with each of the image blocks Iij. Orthogonal transformation units24and202generate DFT coefficients I′ij and P′hij, and power element calculators208and264generate power elements I″ij and P″ij. A basic pattern adjustment unit26adjusts the coefficient of P′hij to generate P′hij1to P′hijn. A watermark pattern generator28calculates variations before and after P′hij1to P′hijn are embedded in I″ij, and selects, from P′hij1to P′hijn, P′″hij1to P′″hij1that provide variations equal to or smaller than the threshold value e. Then, the watermark pattern generator28selects, as a watermark pattern P′ij, the pattern that is most easily detectable, and a pattern embedding unit204that adds P′ij to I′ij.
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WPI Abstract Accession No. 2000-537873 & JP 2000209428 NEC (Jul. 28, 2000).
Kamijoh Kohichi
Shimuzu Shuhichi
Taniguchi Masaaki
Herzberg Louis P.
International Business Machines - Corporation
Mancuso Joseph
Patel Shefali
Scully Scott Murphy & Presser
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