红外系统自动调焦技术的研究与工程实现

研究并实现了一种适用于红外热像仪实际工程应用的自动调焦技术。该技术采用轴向移动变焦方式,选取拉普拉斯(Laplacian)算子作为评价函数模板,以优化的爬山搜索法进行峰值判断,同时结合PID的控制方法驱动调焦电机,最终实现了稳定、快速、精确的自动对焦,并充分考虑了对实际应用中场景目标的适用性。本技术以FPGA为核心处理器,采用SoPC(system on programmable chip,可编程片上系统)的处理架构实现算法,成功应用于工程项目中。

Research and engineering-realization of auto-focus in infrared imaging system

An auto-focus technology for infrared camera is researched and applied to practical project.To realize the automatic focusing,the method uses axial movement of the zoom lens,chooses Laplacian operator as evaluation function,uses optimized mountain climb-searching algorithm to judge the peak,uses PID control method to drive focus motor.And it gets an excellent result.The technology uses FPGA as the core processor and adopts the architecture of SoPC to realize the auto-focus function.The study is engineering oriented and the auto-focus system has been used in practical application.