Image Measurement Study Of The Focusing System

The aiming is a very important factor during measurement. If theaiming and positioning is not accurate, the instability of measurement is notinsured. In general, the applied aiming method of measurement iseye-aiming, it not only is inconvenient and inefficient for operation, but alsoincreases the subjective error of test workers, which is not adapt to modernmeasurement and needs to innovate the technology. Modern measurementtechnology demands new method of focusing and aiming that has littleinstability. mighty function. easy achieve the integration of Optics.Mechanism and Electron.Image measurement technology applise with computer image processtechnology and uses camera replacing of eyes, which may decrease laborintensity of test workers and the subjective error of aiming and reading,furthermore can enhance the measurement efficiency The method of tuningfocus for image measurement technology can be applied to tracking thesurface of object with TV-camera, to measuring shape of surface, and is agood tool for giving solutions that the direct measurement can not solve.Tuning focus of camera must have high quality for these. It is very importantsubject of image measurement how to verify the tuning focus of camera isright, research the method of tuning focus of camera, and apply the methodto track the surface of object.The purpose of this paper is to research the method of tuning focus ofcamera. This paper, base on the development of the tuning focus technologyof domestic and abroad, summarizes existing methods of tuning focus, andpresents the method of tuning focus of camera on the base of image grayvalue. The method have two parts, one is sketchy tuning focus and find outthe sketchy location of focus; the other is precise tuning focus and, base onesketchy tuning focus, find out precise location of focus. Sketchy tuningfocus and precise tuning focus make up the method of tuning focus ofcamera, overcome the defect of old methods of tuning focus, and enhancethe efficiency of tuning focus. During the test of the method of tuning focus,the system of talng focus of camera that has OPtics' Mechanism.Electron. Computer and Control has been researched,Which includes thecontrol soft of precise movemefit. the colltrOl soft of illterface card and.image process soft. ExPeriment finds out that the method of tUning focus ofcamera has better instability and may be used in measurement. MeanWile,this paPer also presents imProve methods and new though of tUning focus,which provides a reference for the follow researchers.