| The development of economy and society improves the living situations of people. And with the development of electrical techniques, computer techniques and signal processing techniques, it's possible to apply high-tech, information-based and intelligent techniques to the society security. Among other things, video surveillance systems are used widely because it can provide intuitive and reliable information. At present, video surveillance systems which can provide digital, network-based and intelligent video surveillance service are very popular. There are many researches about the system too, including platform and algorithms.This paper introduces a digital surveillance system including software of DSP and PC platform. Base on RF5 framework, the paper design the DSP software platform and using .NET to design PC software platform.They commucination via PCI. The whole system can provide video surveillance service to at least five cards.Each card can surveillance two local video input channel and two net IP cameravideo input.The other task of the paper is the research about moving target decect algorithm. There are three algorithms we have researched: Dynamic threshold-difference algorithm based on the background; Inter-frame difference filtering algorithm based on the gradient; based on the Gaussian model.We describe these algorithms in detail. At last DSP optimization is presented.This paper involves the three aspects of the system which include hardware, software and algorithms. And this paper will pay more attentions to the software part and algorithms. Thus, after firstly introduces the hardware design of DM642 card, software design is introduced detailed: 1. the design the DSP software platform and the PC software platform. 2. research about moving target decect algorithms.including Matlab simulation. Finally, this paper gives a moving target decect algorithm's relization, do a lot of things to DSP optimization. |
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