Watermarking of a digitized image
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United States of America Patent
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Dec 30, 2003
Grant Date -
N/A
app pub date -
Jul 21, 2000
filing date -
Jul 21, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A watermarking method and device to embed a digitized watermark into a digital image file in the spatial domain first performs error correction to enhance the robustness of the digital image. The digital image file is first processed such that capacity of each element of the digital image file is calculated. The capacity represents the highest power of element of the watermark that can be added to the related element of the digital file. Elements to which watermark elements may be added are selected and their addresses are stored. Elements of the watermark file are then inserted into the selected addresses in sequence and the watermark is modulated. After the modulation the digitized watermark is embedded into the digital file by distributing the modulated elements of the watermark into the selected addresses.
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