传感器的光学数字图像自动聚焦系统  

Research on optical digital image auto focusing system based on image sensor

作　　者：王琦[1] 

机构地区：[1]北京联合大学师范学院,北京100101

出　　处：《激光杂志》2016年第12期61-64,共4页Laser Journal

基　　金：北京市教委项目(KM201311417005)

摘　　要：传统光学数字图像自动聚焦系统存在稳定性和聚焦响应实时性差等问题,在低照度噪声环境下,容易出现对焦的偏差,提出传感器的光学数字图像自动聚焦系统,首先依据光学自动聚焦的原理来设计图像自动聚焦的硬件系统和软件流程;然后采用黄金分割法选择聚焦的区域,利用拉普拉多算子对离焦光学数字图像进行二阶微分,并获取微分图像的自相关;最后求解自相关离焦图像的弥散斑半径,根据离焦量与弥散斑半径的光学几何关系,实现光学数字图像的自动聚焦。实验证明提出的系统设计具有灵敏度高、可靠性强的优点,在低照度的条件下,仍可以获取比较清晰的图像。Traditional optical digital image auto focusing system have some problems, such as lack of stability, poor real-time performance, and so on. This paper puts forward a design of optical digital image auto focusing system based on image sensor, hardware system and software process according to the principle of auto focusing to design image auto focusing; by using the golden section method focusing on regional selection, defocused optical digital image by using two order differential operator and the Labrador, and solve the differential image the autocorrelation; solving autocorrelation differential from dispersion spot radius of defocus images, based on the spot radius and defoeused optical geometry, automatic focusing optical digital image. The experimental results show that the proposed system has the advantages of high sensitivity and high reliability. Under the condition of low illumination, it can still get a clear image.

关 键 词：传感器 光学数字图像 自动聚焦 硬件系统 

分 类 号：TN29[电子电信—物理电子学]