Chwen-Jye Sze

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A novel image protection scheme called \ c ocktail watermarking" is proposed i n t h i s p aper. We analyze and point out the inadequacy of the modulation techniques commonly used in ordinary spread spectrum watermarking methods and the visual model-based o n e s. To r esolve the inadequacy, two watermarks which play complementary roles are simultaneously(More)
A novel combined watermarking scheme for image authenti-cation and protection is proposed in this paper. By utilizing the publicly available wavelet-based just noticeable distortion (JND) values, the hidden watermark is designed to carry the host image's information such that blind watermark detection becomes possible. The watermarks are embedded using the(More)
A novel image protection scheme called \cocktail watermark-ing" is proposed in this paper. We analyze and point out the inadequacy of the modulation techniques commonly used in ordinary spread spectrum watermarking methods and the visual model-based ones. To resolve this inadequacy, two watermarks which play complementary roles are simultaneously embedded(More)
A new fractal-based image compression system, based on a so-called Adaptive Side-Coupling Quadtree (ASCQ) structure, is proposed. The proposed system consists of three processes: a preprocessing, a compression and a decompression process. In the compression process, the original image is represented by an ASCQ structure. The set of Iterated Function System(More)
In this paper, a novel image protection scheme using \com-plementary modulations" is proposed. In order to satisfy the robustness requirement, two watermarks are embedded into a host image to play complementary roles so that at least one watermark survives any attack. Statistical analysis is conducted to derive the lower bound of the worst likelihood that(More)
A discrete image flux conduction equation which is completely new in this field is proposed. The new approach starts with formulating a discrete image flux conduction equation based on the concept of heat conduction theory. Based on this discrete equation, the status change at a time point can be directly computed from its spatial neighborhood. To more(More)
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