Xu Rongcong

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In the paper, we bring forward an image encryption algorithm during the process of JPEG compression. According to the chaotic theory of dynamic systems and modern cryptography, we solved the following technique. First, how to generate chaotic sequence having good randomness according to the characteristic that logistic chaotic systems are extremely(More)
The PDE-based image restoration has drawn much attention in the recent years. In this paper, we first propose two novel improved models based on the Perona-Malik anisotropic diffusion model and the fourth-order PDE model. Then, we use multi-grid numerical solutions to solve our PDE models. Numerical experiments show that our improved algorithms are(More)
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