Image analysis – Applications
Reexamination Certificate
2004-07-01
2009-11-17
Bella, Matthew C (Department: 2624)
Image analysis
Applications
C382S276000, C380S046000, C713S176000, C283S113000, C358S003280
Reexamination Certificate
active
07620198
ABSTRACT:
A watermark coding method and its recording medium utilize image interleaving and wavelet-based transformation to enhance the robustness of the image. The watermark series to be inserted is converted, encrypted, and modulated to increase the difficulty in decoding and restoring. Finally, the watermark is distributed and hidden in various frequency bands of the image in a frequency hopping way, generating a robust watermarked image. When used in a recording medium, side information produced during coding is recorded in the lead-in area of the recording medium to reduce the chances of illegal copying.
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Li Chien-Ju
Tsai Meng-Han
Wu Guo-Zua
Wu Kun-Ta
Bella Matthew C
Birch & Stewart Kolasch & Birch, LLP
Industrial Technology Research Institute
Newman Michael A
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