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In this report, a watermarking method for grayscale images is proposed that is invisible and robust to certain attacks. Chaotic maps are used to generate the watermark which improves the security of the method. The crown watermark is embedded in the real part of DFT domain and the embedding position is determined by the SURF algorithm. The peak(More)
  • Rui Ye, Qing Wu
  • 2012 IEEE 2nd International Conference on Cloud…
  • 2012
This paper proposes a cloud computing trust model based-on SOA by combining the characteristics of SOA, and discusses the relation between the service and users in the cloud computing. Meanwhile, proposes a curve fitting based trust selecting and updating mechanism to ensure the authenticity and accuracy of the trust relation. Finally, verifies the(More)
Diversity among individual classifiers is widely recognized to be a key factor to successful ensemble selection, while the ultimate goal of ensemble pruning is to improve its predictive accuracy. Diversity and accuracy are two important properties of an ensemble. * Corresponding author: Tel: +86-25-84593038; Fax: +86-25-84498069; email: daiqun@nuaa.edu.cn(More)
In this paper we determine and modify the values of the two parameters in the companding transform function proposed previously. The CCDF of the compressed signals is derived and it shows good PAPR reduction ability. BER of the modified scheme is simulated, which shows that when combined with oversampling, the scheme can achieved good BER performance. Power(More)
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