A new two-dimensional quantization method for digital image watermarking

Yevhen Zolotavkin, Martti Juhola

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

9 Citations (Scopus)

Abstract

We propose a new technique of Distortion Compensation (DC) for the two dimensional Quincunx Lattice Quantization that is used in watermarking. The choice of a new direction of quantization is explained by the form of Voronoi cell of the lattice elements. Parameter α controls DC and can be adjusted to maximize the mutual information between embedded and detected message in a noisy channel. For a special case of initial distribution of original samples, quantization distortion is estimated and expressed analytically. Experimental evaluation of robustness under Additive White Gaussian Noise (AWGN) is conducted using natural images and compared with several other known two-dimensional Lattice as well as Scalar Quantization methods with conventional DC. Criterion of Watermark to Noise Ratio (WNR) was used for comparison. Among the most important findings related to the Modified Quincunx are: manipulating only a half of samples required in contrast to the other two-dimensional methods; considerably increased mutual information under low WNR; identical to the conventional Quincunx procedure of watermark extraction (decoding).
Original languageEnglish
Title of host publicationThe 17th International Conference on Advanced Communication Technology, Technical Proceedings
Subtitle of host publicationPhoenix Park, PyeonhChang, Republic of Korea, Jul. 1-3, 2015
EditorsDae-Young Kim
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages155-160
Number of pages6
ISBN (Print)9788996865056
DOIs
Publication statusPublished - 2015
Externally publishedYes
EventInternational Conference on Advanced Communication Technology 2015 - Phoenix Park, Pyeongchang, Korea, Republic of (South)
Duration: 1 Jul 20153 Jul 2015
Conference number: 18th

Conference

ConferenceInternational Conference on Advanced Communication Technology 2015
Abbreviated titleICACT 2015
CountryKorea, Republic of (South)
CityPyeongchang
Period1/07/153/07/15

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