| With the development of precision guidance technique and infrared technique, researchers are paying more and more attention to infrared imaging guidance technique.The technique of small infrared target detection is one of the key technologies in the system of infrared image information.So researching the detection algorithm of small calculation,high performance and less logic resource has been the subject of intense investigaion now and in the future.In this paper, a track-assosiation detection algorithm in IR image sequeences was studied which could be realized by hardware conveniently. Based on the traditional track-associated algorithm, this algorithm was made from two steps: Firstly, According to continuity and relativity of movement,targets were easily separated from noise by line-rule; secondly, the detection of target was performed by predicting target position by least-square algorithm and gliding confidence test.Based on the theoretically analyzed, in this paper the algorithm's archtecture was presented. And in order to satisfy real-time requirement, an FPGA hardware realization solution to the detection algorithm was proposed. The main idea and realization of several modules such as target-filtration module, track-prediction module and track- macthing module, had been described in detail. Especially, the shift-add cell was analyzed which was used to realize multiplication and division in hardware. At the same time, the precision problem of the shift-add cell was discussed and also a solution was given .The hardware realization had been done with register. The validity of the design was verified by the ModelSim simulator. Theoretical analysis and simulations indicate that the design meets the real-time requirement and has simple structrue and less logic resource.This method make a solid foundation for the realization of infrared detection system on one piece of FPGA, and also make a sense of the improvement of infrared imaging system's performance. |
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