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24 November 2009 Tracking device of multiple targets based on IR fish-eye system
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A tracking device of multiple target is proposed, whose field range reaches hemisphere airspace(sr) because of the using of IR Fish-eye system. The infrared ray is collected by Fish-eye lens, by this way can get the thermal image about the whole space, whose range depends on the lens used. Thanks to the Fish-eye system and Ptsi staring focal plane array, the tracking device can get a big range, that means can get multiple target at one time. Depends on the algorithm adopted to process the image has been gotten, the tracking device specify some points with intensive ray which means elevated temperature, and that will be the targets. At the next step after targets detection, the algorithm will compute out the speed and orientation of every target, then figure out a quotient-for-danger about every target. With this quotient, the algorithm can judge which one is the most dangerous from those flying to us, and it should be treated firstly, then the less dangerous ones, etc. To ensure the whole system run at real-time, all of the processing has to be finished at a moment. A TM320 DSP is adopted to run the algorithm. The result will be displayed at a LCD with every target labeled by their quotient-for-danger. The reaction speed and precision of this tracking device has been proved on our multiple target experiment platform.
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Gang Li, Xuguang Lu, Yongqiang He, HongBin Shen, Yuanbo Wang, and Li Li "Tracking device of multiple targets based on IR fish-eye system", Proc. SPIE 7513, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Process Technology, 75131H (24 November 2009);

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