1) Basic concepts of Auto Focus Algorithm 1.1) AF Detection methods There are two focus detection (AF) methods. 1) Distance detection method. 2) Contrast detection method. 1.1.1) Distance detection method The distance detection method is that the camera use AF module for detecting distance for main objects. If the camera is used this AF method, it will not need to use CCD to detect object’s contrast. There are three types of AF modules. 1. Active AF module 2. Passive AF module 3. TTL AF module 1.1.1.1) Active AF module Active AF systems measure distance to the subject independently of the optical system, and subsequently adjust the optical system for correct focus. There are various ways to measure distance, including ultrasonic sound waves and infrared light. In the first case, sound waves are emitted from the camera, and by measuring the delay in their reflection, distance to the subject is calculated. Polaroid cameras were known for successfully applying this system. In the latter case, infrared light is usually used to triangulate the distance to the subject. An exception to the two-step approach is the mechanical autofocus provided in some enlargers, which adjust the lens directly. 1.1.1.2) Passive AF module Passive AF systems determine correct focus by performing passive analysis of the image that is entering the optical system. They generally do not direct any energy, such as ultrasonic sound or infrared light waves, toward the subject. (However, an autofocus assist beam of usually infrared light is required when there is not enough light to take passive measurements.) Passive autofocusing can be achieved by phase detection or contrast measurement.

自动对焦相机 我的自动聚焦算法的开放源代码实现，用于带有图像处理算法的常规显微镜。

对焦算法测试组图，可用以自动对焦算法的测试

自动对焦 该项目是gPhoto2连接到OpenCV概念证明。 它是基于边缘检测的自动对焦的简单实现。 仅在尼康DSLR上进行了测试。 （尼康D90）。 但它可以在所有尼康数码单反相机上使用，并且与其他设备的工作几乎没有关系。 对于OpenCV扩展，请转到我在github上的OpenCV分支： 有关gPhoto2的详细信息，请访问： 评估功能 评估功能非常简单（框架中边缘的分数）。 但这已经足够了。 我已经用6个不同的场景测试了此功能。 评估功能： 聚焦策略 待办事项：现在，仅在源代码的注释中int correctFocus(bool, FocusState&, double)转到方法int correctFocus(bool, FocusState&, double) 。 未来 去做： 对焦区域（遮罩）。 **简单-形状**对象，（在屏幕上单击以选择一个？） 持续聚焦。 **跟随

包含ov5640初始化过程、显示格式、以及自动对焦固件，初始化后需要向ov5640写入4KB的寄存器，寄存器的值根据电机驱动的不同而有所差异，

OV5640自动对焦照相模组应用指南(MIPI接口)R2.13C-ZTE.pdf

主要说明OV5640DVP接口下的应用方法 熟悉后可在android/Linux下移植OV5640驱动

提出一种液晶透镜爬山自动对焦算法。液晶透镜是一种可电控调焦透镜,具有良好的透镜性能。传统玻璃透镜成像系统中的爬山法自动对焦功能一般需要音圈马达带动透镜使之不断移动来寻找最佳清晰像面位置。而所提算法的自动对焦则是通过改变电压来完成的,整个对焦过程不需要任何的机械移动即可实现大范围对焦,使对焦系统的小型化成为可能。实验结果表明,液晶透镜的对焦性能良好,成像解析度高。

行业-电子政务-对焦方法及装置、电子设备.zip

行业-电子政务-电子设备的对焦检测装置.zip