Automatically assigned DDC number: 0058
Manually assigned DDC number: 0058

Number of references: 4

Title: Robust Bit Extraction From Images

Author:

Subject: Jiri Fridrich Robust Bit Extraction From Images

Description: : In this paper we describe an algorithm for robust extraction of bits from image blocks and a method for synthesizing a Gaussian pseudo-random sequence from those bits. The bits are extracted by thresholding projections onto random smooth patterns generated from a user-specified key. The extracted bits are further utilized to synthesize a Gaussian pseudo-random sequence that changes continuously with the image block yet depends sensitively on the secret key. The proposed technique is quite general and can be combined with majority of oblivious watermarking schemes that generate watermarks from pseudorandom sequences. We anticipate that this algorithm will find applications in many oblivious watermarking schemes including secure data embedding into videos and watermarking images for tamper detection. Keywords: Robust bit extraction, digital watermarking, data embedding in video, watermarking for tamper detection 1. Introduction Digital watermark is a perceptually invisible pattern ro...

Contributor: The Pennsylvania State University CiteSeer Archives

Publisher: unknown

Date: 1998-10-27

Pubyear: 1999

Format: ps

Identifier: http://citeseer.ist.psu.edu/151065.html

Source: http://ssie.binghamton.edu/~jirif/Research/bitex.ps

Language: en

Relation:

Relation:

Relation:

Relation:

Rights: unrestricted

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