Auto Zoom And Focus Binocular Vision System

Binocular Vision System is commonly basedon fixedfocus camera. But in many cases, We need to observe both the distant objects and the objects at close range clearly without changing the location of Binocular Vision System. It is difficult for the Fixed Focus Binocular Vision System to meet this need. And the Variable Focus Binocular Visual System can solve this problem. Auto Zoom and Focus Binocular Vision System are flexible and convenient which the fixed focus system is not. It can be widely used in three-dimensional photography, motion tracking, mobile robotics, three-dimensional detection, human-computer interaction. One problem of the Binocular Zoom System is how to keep the focus length of the two cameras synchronous. Another is how to update camera parameters after the lensfocus changed. Certainly, as the same system with monocular zoom, auto focus is a key issue to the Binocular Zoom System.First, the basic theories and methods of auto focus in the Single Camera System are studied. And the focus measure function, the focus place search algorithm and intelligent focus framing technologie are analysised. In order to obtain a better result offocusing, the focus measure function is improved. The improved focus measure function use the Absolute variance function to suppress the noise and multi-modalnature of the energy gradient function, and it is with highly sensitive and single-peak.Secondly, the zoom synchronization of Binocular Zoom System is studied. To solve the problem which Variable Focus Binocular Visual System sets high requirements for hardware and is very complex in installation and design. This paper give a method of zoom synchronization based on the image matching which makes Variable Focus Binocular Visual System more flexible and with higher Generality.Finally, Auto Zoom and Focus Binocular Vision System is designed, which can focus automatically and keep the focal length synchronized. In this paper, the design of the hardware and the software about this system is described in detail.And the problem appeared in the design of the system about the auto focus and zoom synchronization is analysised concretely. The system can be adaptive to adjust itself effectively to keep the two cameras focused and the focal length synchronized.