外文翻译-摄像机的原理和应用.doc

1、外文资料翻译资料来源：文章名：The principle and application of video camera书刊名：Digital Image Processing作 者：Kenneth R. Castleman出版社：清华大学出版社，2002章 节：1.2 The Element of Digital Image Processing页 码：P2P7文 章 译 名： 摄像机的原理和应用 姓 名： 学 号： 指导教师(职称)： 专 业： 班 级： 所 在 学 院： 完成日期： 2012年 5 月 13日1The principle and application of video

2、cameraWith the rapid development of computer and network communication technology, digital information has penetrated into all aspects of society. Set off a worldwide information revolution. Since the concept of digital information appear in a few years, digital technology has on our life, work and

3、learners to occupy the important position. Digital cameras and digital video camera is in this context. As a computer professional external social security, with its powerful digital image capture, influence function, smart setting level city, simple and quick operation method, the large capacity of

4、 information storage technology and excellent adaptability in a wide variety of information equipment projection. Their applications not only confined to professional users, ordinary households is also a sharp rise in the number of digital cameras and digital video camera will eventually become a da

5、rk gray widespread popularization of digital products in the life.From a practical point of view, digital cameras and digital video camera use is increasingly close, both of which can realize digital images and dynamic images, storage and processing. Therefore, the combination of book market popular

6、 models in recent years, by the combined way of graphic image intuitive, comprehensive system introduces the digital cameras and digital video all-in-one machine structure, working principle, market environment, using method and maintenance to maintain daily. On this basis, further introduced the di

7、gital image and dynamic video post-production technology.Mainly includes the following several parts: video machine lens, fuselage video unit, viewfinder, pickup unit and power supply unit. Video shooting, the pick up of sound and signal recorded at an organic whole. Camera when shooting scenery, sc

8、enery in the form of light through the lens, the light through the lens to more color and neuter color temperature filter processing, then enter the dispersion prism incident light is decomposed into red, green, blue three primary colors of light, illuminate the CCD target surface finish photoelectr

9、ic conversion, form a weak electrical signals, through prevention circuit for signal amplification. Due to the camera, color filter, filter and dispersion prism optics such as not idealized form of electrical signals exist the certain flaw, cannot guarantee the image quality after the reduction, nee

10、d to all kinds of signal amplification, supplement and correction, this section through the signal processing circuit, composed of two parts of the analog and digital processing. Accords with a requirement only after these processing can form the basis of video signal, and then went to the requireme

11、nts of the various encoder output video signal, such as simulation, simulation component, digital weight and digital high-definition signals, and so on, and finally into the signal recording unit, complete mixing of audio and video signals, and finally recorded by way of a tape or disk.The use of th

12、e camera image monitoring technology has a qualitative leap. First of all, network cabling system replaces the traditional video analog wiring, has realized the real three nets (video, audio, data), network cameras plug and play, the project is simple, convenient system expansion; Second, cross-regi

13、onal remote monitoring possible, especially using the Internet, video surveillance has no distance limit, and the image is clear, stable and reliable; Again, image storage, retrieval, very safe, convenient, long distance can store, more machine backup storage and fast nonlinear search and so on.Netw

14、ork cameras generally consists of camera, image sensors, sound sensors, A/D converter, images, sound, controllers, web server, external alarm, control interface and other components.Lens: the lens as the front part of the IP camera has a fixed aperture, automatic aperture, automatic zoom, automatica

15、lly change times, such as species, the same as the analog cameras.Image sensors, sound sensors, image sensors with CMOS and CCD two modes. CMOS is complementary metal oxide semiconductor CMOS silicon and germanium was mainly used these two elements are made of semiconductor, negatively charged and positively charged on the CMOS transistors to realize the basic functions. The current can be produced by two complementary effect to interpret and image processing chip records. CMOS for CCDs main advantage is very save electricity. Unlike consisting of diode CCD and CMOS