多目标自由聚焦系统

Multi-object free-focusing system

为使聚焦系统能高效、及时、准确地定位聚焦目标,提出了一种多目标自由聚焦算法。通过动态划分窗口提取单目标,利用同步检测法防止视场切换后窗口内无目标,采取对比分析法抑制噪声,建立了快速聚焦评价函数数学模型。通过实验对比分析了本聚焦评价函数相对于现有算法的优点,研究了自适应变步长全局搜索策略。系统以TMS320DM642硬件为基础,并通过VC软件编程实现。经过大量户内外实验分析,证明了该系统的可行性、正确性和有效性,并且已成功应用到边防监控转台产品中。

The efficient timely and accurate orientation of focusing aim is the key of a focusing system.A new evaluation method called multi-object free-focusing algorithm was proposed.User may select any single object by changing windows.Synchronized detection method was used to solve the problem of no object in the window after scene changing.The comparative and analytical method for restraining noise was discussed.The quickly focusing mathematical model was established.The technique is better than all the other methods by experimental comparison.Self-adapt-alter-step whole-range-search strategy was studied.The system was set up successfully in the TMS320DM642 hardware and VC software platform.The abundant outdoor and indoor experimental results indicated the feasibility,the veracity and the validity of the system,and it has been applied to frontier defence products.