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任何数字图象处理工作,都首先需要把图象进行数字化采集并把采集的数据送入计算机系统以便进行处理。由于摄象管是由光学透镜把实象投影到靶面上再由电子线路来控制电子束的偏转扫描,从而把靶面上的平面光学图象变换成电压信号,所以实象可以是立体实物,也可以是图片,图象来源丰富灵活,且图象采集速度也可以比较高,在对于图象分辨率要求不太高的场合,摄象管一直是图象数字化采集装置的重要器件。因为电视系统已相当完善,所以大部分图象采集装置直接沿用通用电视摄象机,其结果,使整机的同步、模数转换和数据存贮的速度很高.后续电路难度较大.致使系统造价昂贵,一般用户望而
Any digital image processing work, first of all need to digitally capture the image and the collected data into the computer system for processing. Because the image tube is the optical lens to the real image projected onto the target surface and then the electronic circuit to control the electron beam deflection scan, so that the plane of the plane of the optical image into a voltage signal, so the real image can be solid , Can also be a picture, rich and flexible image source, and image acquisition speed can be relatively high, in the case of the image resolution is not too high, the camera tube has been the image digitization acquisition device is an important device. Since the television system is quite well established, most of the image capture devices follow the general television cameras directly, resulting in a high speed of synchronization, analog-digital conversion and data storage of the entire machine. System costly, the average user