1999
DOI: 10.1117/12.344680
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<title>Blind digital watermarking for cartoon and map images</title>

Abstract: Cartoon/map images are synthetic graphics without complicated color and texture variation, which makes the embedding of invisible and robust digital watermarks difficult. In this research, we propose a wavelet-based, thresholdadaptive watermarking scheme (TAWS) which can embed invisible robust watermarks into various kinds of graphical images. TAWS selects significant subbands and inserts watermarks in selected significant coefficients. The inserted watermarks are adaptively scaled by different threshold value… Show more

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Cited by 26 publications
(17 citation statements)
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“…While watermarking a vector map, its fidelity must be retained (Su et al 1999, Aspert et al 2002. The term fidelity is often used as a measure of a map's validity in the watermarking world.…”
Section: Issues In Vector Map Watermarkingmentioning
confidence: 99%
“…While watermarking a vector map, its fidelity must be retained (Su et al 1999, Aspert et al 2002. The term fidelity is often used as a measure of a map's validity in the watermarking world.…”
Section: Issues In Vector Map Watermarkingmentioning
confidence: 99%
“…[4]. The most common evaluation method is to compute the peak signal-to-noise ratio (PSNR) between the host and watermarked signals.…”
Section: Invisibilitymentioning
confidence: 99%
“…It will be shown that coefficients selection based on the time-frequency analysis provides flexibility and robustness even for de-synchronization attacks such as time stretch [14]. The concept of bit planes is used for logo insertion [15]. The S-method is used for time-frequency representation of speech signals.…”
Section: Introductionmentioning
confidence: 99%