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Copy detection aims to identify various content-preserving copies from the same origin and distinguish the different sources. In this paper, we propose a novel feature for image copy detection based on the radon transform (RT). We first theoretically analyze that the proposed feature is invariant against rotation, scaling and translation (RST) operations and robust to lossy JPEG compression and additive...
In this paper, we introduce a robust watermarking for the AVS video standard of China. The proposed algorithm is based on the Particle Swarm Optimization (PSO) technique. It is implemented in the compressed domain by modifying the quantized coefficients. The watermark signal is embedded in luminance components, whose embedding positions are optimized using PSO, resisting common signal processing operations...
Discrete cosine transform (DCT) coefficients of a natural image can be statistically modeled as the generalized Gaussian distribution (GGD) whose shape parameters can be estimated by the maximum likelihood (ML) estimation method. This paper presents a novel image authentication scheme based on the robust content in DCT domain, where a new concept robust feature is extracted using the modified ML principle...
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