【作者】 金雁；

【导师】 高品贤；

【作者基本信息】 西南交通大学 ， 测试计量技术及仪器， 2002， 硕士

【摘要】 人类传递信息的主要媒介是图像，据统计在人类接受的信息中，视觉信息占60％。所以，作为传递信息的重要媒体和手段，图像信息是十分重要的。图像处理科学对人类具有重要意义，图像信息处理是人类视觉延续的重要手段，图像处理技术对国计民生有重要意义。CCD图像即数字图像，CCD图像处理的应用随着科学技术的发展越来越广泛，已经渗透到通信、工业、医疗保健、航空航天、军事、科研、安全保卫等各个方面，在国计民生及国民经济中发挥着越来越大的作用。 在CCD图像检测中，常规的CCD图像获取是通过控制图像采集卡进行冻结、存盘和读盘来实现的，由于图像的数据量很大，存盘和读盘花费了大量的机时，这个时间远远超过了对图像进行分析和处理的时间。这样就难于实现图像的实时检测与处理，并且对不需保存中间图像的情况是极大的浪费。为了适应现代图像处理的实时性要求，本文研究了一种新的图像获取方法——利用屏幕抓取获得CCD图像。论文首先介绍了常规的图像获取方法和CCD传感器以及基本的CCD图像检测系统；然后，介绍了CCD图像屏幕抓取方法的原理和软件实现，主要针对屏幕抓取的图像与原图像之间在各种图像特性上存在的误差以及通过抓取屏幕获取图像与通过常规方法获取图像所用机时进行了分析，验证了屏幕抓取方法的可行性以及它的优越性；最后，在介绍了一般的图像检测处理方法之后，对具体的静态和动态的CCD图像进行了屏幕抓取、检测以及误差分析。 本论文属应用性研究，对新的图像获取方法的研究以及所开发的应用软件是成功的，具有一定是实用价值。更多还原

【Abstract】 Image is a main medium that people transmit information. According to statistics, 60 percent of the knowledge that people get from outside is given by all kinds of picture. So as the important medium and means of transmitting information, image information is very important. Image processing is momentous significance to people. Image is a main source of getting information. The technology of image processing is important to the national economy and the people’s livelihood. CCD image is digital image. With the development of science and technology, CCD image is applied more widely and it has been applied in communication, industry, military and so on. It is more and more useful in the national economy and the people’s livelihood.In the course of CCD image processing, the conventional way of getting image is controling the image capture card to freeze,save and read the image. Because the amount of the image data is large, the time used in freezing, saving and reading is so long that it extends the time of processing image. So it is difficult to realize real time processing. In order to meet the real time processing, this paper studied a new means of getting image - capturing in the screen. Firstly, it introduced the conventional way of getting image, CCD sensor and basic CCD image processing system. Secondly, it introduced the fundamentals and the program of realizing the capture. It mainly analysed the error between the capture image and origin image. And it accounted the time of getting image by conventional way and by capture. According the research, the way of capture image is successful and it has many advantages. In the end, after introduced much means of processing image, image capture is applied in static image processing and dynamic image processing. And it dose much work on the error analysis.This paper belongs to application research. The new method of getting image and the program are successful and they are worthy.更多还原