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A digital image watermarking algorithm based on Fourier domain is proposed. This algorithm calculates an Invariant Centroid of the image and uses it as the origin of logarithm polar mapping (LPM). Then two-dimensional Discrete Fourier Transform (DFT) is performed on the LPM image. And then the amplitude of intermediate frequency is used as the watermarking embedding domain. In order to enhance the...
Task scheduling is an integrated component of grid computing among the key technology of the grid. P2P_Grid model, a new resource manage model of grid is brought up in this paper. In this model, we make some super-peers to join grid, it divides the grid into corresponding sub-grid. Each super-peer composes one local grid system and answers for dealing with events of a local Grid that it belongs to;...
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