Correlation watermark for image authentication and alternation locations detection

Abdelkader H. Ouda; Mahmoud R. El-Sakka

doi:10.1117/12.449592

5 December 2001 Correlation watermark for image authentication and alternation locations detection

Abdelkader H. Ouda, Mahmoud R. El-Sakka

Proceedings Volume 4475, Mathematics of Data/Image Coding, Compression, and Encryption IV, with Applications; (2001) https://doi.org/10.1117/12.449592
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

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.

Citation Download Citation

Abdelkader H. Ouda and Mahmoud R. El-Sakka "Correlation watermark for image authentication and alternation locations detection", Proc. SPIE 4475, Mathematics of Data/Image Coding, Compression, and Encryption IV, with Applications, (5 December 2001); https://doi.org/10.1117/12.449592

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