【摘要】 介绍了基于图像处理方法的自动调焦系统的组成、工作原理、硬件电路设计和软件设计.该系统的核心是图像处理部分和控制部分.导出了计算聚焦量的三个快速算法公式,优化了系统的实时性能.详细分析了自动调焦的控制过程,并提出了渐变步长的思想,提高了系统的控制精度.实验结果表明,在较宽范围的光照度条件下,应用该系统均能获得良好的调焦效果.更多还原

【Abstract】 The constitution,operating principle,hardware and software of automatic focusing system based on image processing method are presented.The units of image processing and control are the core of this system.Three speediness arithmetic expressions for calculating the focused quantity is introduced to optimize the real-time performance of the system.The control process of automatic focus is analyzed in detail,and the idea of step length changing gradually is presented to increase the control precision of the system.Experimental results show that the system can realize good focus in a wider range of illuminance.更多还原