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Based on the observation that motion of different pixels from the same target has very similar spatial-temporal properties in bus video surveillance images, a feature point's trajectory clustering method is proposed to estimate passenger flow in this paper. Firstly, the pyramid-based optical flow algorithm is utilized to tracking the feature point's movement in the images; then, their trajectories...
This paper discusses the real-time data modeling, acquisition and analysis, analyses and designs the real-time data warehouse architecture. In this architecture, the introduction of a multi-level real-time data cache facilitates the real-time data storage. And the using of the Web service to capture real-time data makes the real-time data capture and load easily. This paper also discusses the real-time...
Speckle noise appears in synthetic aperture radar (SAR) images owing to the SAR imaging mechanism. This paper investigates and proposes a novel method on SAR images despeckling via grey system theory. In the method, we dynamically select one referential sequence to stand for inner region pixels, and a group of comparative sequences to represent the pixels to be enhanced. Then, edge pixels are distinguished...
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