基于图像处理的一体化摄像机自动聚焦系统设计

研究一体化摄像机中的自动聚焦控制功能,运用数字图像处理技术来实现自动聚焦。采用加权中值滤波算子作为判断图像清晰度的评价函数,此算法可减小外部噪声对聚焦的干扰,并结合传统摄像构图采用的黄金分割理论来选择聚焦区域,然后利用改进的爬山算法来搜索焦点。在此基础上,运用FPGA开发平台实现该自动聚焦技术。通过实验验证,设计的系统的灵敏度高、稳定性好。

Design of auto-focusing system based on image processing for Integration camera

The control function of auto-focusing in integration camera is studied,and digital image processing techniques are used to realize auto-focusing.Using the median filter algorithm as evaluation function of focusing,this algorithm reduces the outside noise interference on the focus,and combined with the traditional camera to choose the focus area with the golden section composition theory,the improved mountain-climbing algorithm is utilized to search the focus.On this basis,auto-focusing can be realized by using the FPGA development platform.Through the experiment proved that this system has a high sensitivity.