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An image watermarking scheme resisting RST (rotation, scaling, translation) based on RST invariant square region is proposed in the paper. Two SIFT (scale-invariant feature transform) feature points are selected to determine the position, size, direction of the region. The watermark embedding and detection is completed in the square region with quantization, which could guarantee blind detection....
In this paper, QuickBird high resolution satellite image data, combined with the prior landuse maps, the landuse major planning map and other basic datum was adopted to extract landuse information of Nanchang Hi-Tech Industrial Development Area through the human-computer interaction approach, and the results were verified by plot in field to do meta-analysis. The results show that the multi-information...
Singularity analysis of vibration signal is an effective method for mechanical fault diagnosis. Signal singularities can be characterized by its wavelet transforms modulus. Real wavelets are generally adopted in analysis. In fact, analytic wavelet transform (AWT) only reflects positive frequencies of signal and its modulus oscillation is weaker than real wavelet transform (RWT), so signal singularities...
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