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When steganalysis performed on heterogeneous images made up by different resampled images and raw single-sampled images, the difference of statistical properties between which can caused “mismatch” between training and testing images in steganalytic classifier. Therefore, the detection performance of the classifier decreases. The problem above limits the application of the existing steganalysis algorithms...
For the satisfaction of International Color Consortium (ICC) profile specification, it makes necessary to obtain the uniform profile data by interpolation. Color data sampled directly is usually not uniform for LUT (look-up table) created. Now color calibration is efficiently used for uniform data with tetrahedral interpolation. However, location of proper tetrahedron for interpolation for non-uniform...
In order to find the concealed location of small oil and gas reservoir more accurately and improve efficiency of processing large seismic data, we present a parallel Hilbert-Huang transformation algorithm (PHHT), by which the extreme points and eventual average envelope of seismic signal become more precision during empirical mode decomposition (EMD)and getting the number of extreme points and zeros...
In order to distinguish and validate the characteristic of original seismic profile or interface of lithology, an improved Hilbert-Huang algorithm is presented in this letter, it decomposes the signal into a finite set of empirical mode component, and then Hilbert spectrum analyses for decomposed component. We use GPU for the parallel processing of massive seismic data, it greatly improved the processing...
Among the newly explored research areas of digital watermarking, various types of data embedding technologies for vector graphics have drawn more and more attention. The features of vector graphics on the data expression and use were analyzed. The requirements of watermarking for vector graphics are discussed. Utilizing the characteristics of vector graphics, an adaptive classification method is proposed,...
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