Construction and detection of digital holographic watermarks

Chau-Jern Cheng, Li Chien Lin, Wen Tsun Dai

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    This study presents an optical watermarking scheme using a digital holographic technique. The digital holographic watermark is constructed by a modified Mach-Zehnder interferometric architecture and a constant-level embedding algorithm, and the watermark detection is optically implemented using VanderLugt 4-f correlator with a weighting matched filter. The detection procedure is a compromise between perceptual quality and correlation robustness, in which the weighting factor selection rule and optimal threshold for the watermarking scheme are given and analyzed. Additionally, the detected correlation is spatially separable and avoided interference from the cover image. Both analytical and experimental results are presented and discussed.

    Original languageEnglish
    Pages (from-to)105-116
    Number of pages12
    JournalOptics Communications
    Volume248
    Issue number1-3
    DOIs
    Publication statusPublished - 2005 Apr 1

    Fingerprint

    Watermarking
    matched filters
    Matched filters
    Correlators
    correlators
    embedding
    Mach number
    interference
    thresholds

    Keywords

    • Digital holography
    • Optical correlator
    • Watermarking

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    Construction and detection of digital holographic watermarks. / Cheng, Chau-Jern; Lin, Li Chien; Dai, Wen Tsun.

    In: Optics Communications, Vol. 248, No. 1-3, 01.04.2005, p. 105-116.

    Research output: Contribution to journalArticle

    Cheng, Chau-Jern ; Lin, Li Chien ; Dai, Wen Tsun. / Construction and detection of digital holographic watermarks. In: Optics Communications. 2005 ; Vol. 248, No. 1-3. pp. 105-116.
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