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Proceedings Paper

Correlation watermark for image authentication and alternation locations detection
Author(s): Abdelkader H. Ouda; Mahmoud R. El-Sakka
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Paper Abstract

In this work, a new watermarking scheme is proposed to authenticate an image. This scheme is capable to detect the alternation locations, if any. The basic idea of this scheme is to uniquely represent a given image by a short string-sequence. This string-sequence is based on a correlation coefficient statistic; where the relationship between two adjacent image-rows/columns is utilized. To generate this string-sequence a given image is divided into small blocks, where each block generates a different string-sequence. The Elliptic Curve Digital Signature Algorithm (ECDSA) is employed to sign these string-sequences to form an image dependant block-based watermark. Experimental results showed that the proposed watermark is highly sensitive to any alteration, and it can identify the location of any modified block in a given image.

Paper Details

Date Published: 5 December 2001
PDF: 8 pages
Proc. SPIE 4475, Mathematics of Data/Image Coding, Compression, and Encryption IV, with Applications, (5 December 2001); doi: 10.1117/12.449592
Show Author Affiliations
Abdelkader H. Ouda, Univ. of Western Ontario (Canada)
Mahmoud R. El-Sakka, Univ. of Western Ontario (Canada)

Published in SPIE Proceedings Vol. 4475:
Mathematics of Data/Image Coding, Compression, and Encryption IV, with Applications
Mark S. Schmalz, Editor(s)

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