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Semi-fragile watermarking which is robust to given operations and fragile to conscious operations, is a useful authentication technique for digital media. In this paper, a novel semi-fragile image watermarking algorithm that accepts gradient sharpening is proposed. In the proposed algorithm, based on the theory of gradient sharpening, the watermark is embedded in the space domain by modifying the...
DCT is widely used in watermarking, but the effect of different coefficients on robustness and fidelity remains unclear. For example, there is only one DC coefficient, but many low frequency coefficients, so error correcting coding can be applied to improve the robustness of the low frequency coefficients, and in this situation, how about the robustness between a single DC coefficient and all the...
There are always more than one quality responses or characteristics in product or process design and engineers often must choose optimum parameter combination for these responses simultaneously. Taguchi method, as a cost-effective method for off-line quality control, especially the quadratic loss function shows loss of quality directly, has been widely employed by quality engineering to deal with...
This paper investigates the problem of robust asymptotical stability for uncertain stochastic neural networks with discrete and distributed delays. Based on Lyapunov-Krasovskii functional and stochastic analysis method, new stability criteria is presented in terms of linear matrix inequalities to guarantee stochastic neural networks to be robustly asymptotically stable for all admissible parameter...
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