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Environmental indices (EI) are used as a communication tool to describe overall status of the environmental systems. Due to the uncertainty in the process of determination of EI, a fuzzy evidential method is proposed in this paper. First, the data collected from different sources are modeled as fuzzy numbers. Second, a method to transform fuzzy variables into basic probability assignments is developed...
This paper presents a new method for satellite image classification. Specifically, we make two main contributions: (1) we introduce the sparse coding method for high-resolution satellite image classification; (2) we effectively combine a set of diverse and complementary features-SIFT, Color Histogram and Gabor to further improve the performance. A two-stage linear SVM classifier is designed for this...
In this paper, a fast view scheme of mass remote sensing images based on image pyramid is described and implemented. The key techniques in this scheme are tiling, image pyramid, and cache scheduling management. This scheme employs tiling to break the limit of the Windows process memory and improve the I/O speed of hard disk. A wavelet based image pyramid is built for multi-resolution displaying. Cache...
In this paper, the wideband beamforming based on microphone arrays(MA) is investigated. This method combined the technologies of frequency focusing and sub-band partitioning. The frequency focusing algorithm is to focus the wideband signals to the narrowband signals at the reference frequency. But this algorithm only applies for the signals with fractional bandwidth less than 1.25. The improved focusing...
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