Counteracting geometric distortions in watermarking

Details Counteracting geometric distortions in watermarking Counteracting geometric distortions in watermarking

2006-10-03

2006-10-03

Cangialosi, Salvatore (Department: 3621)

Cryptography

Miscellaneous

C713S176000

Reexamination Certificate

active

07116781

ABSTRACT:
A digital watermarking method receives multimedia data, such as images or audio, in compressed or uncompressed form, and extracts a digital watermark while counteracting geometric distortions. To counteract geometric distortion, a watermark reading process translates the data before extracting the digital watermark. The reading process operates on compressed data such as JPEG or MPEG images, which are comprised of compressed blocks of image data.

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