随着电视技术的普及和发展,测量电视的应用越来越广泛。在用电视观察和测量物体运动过程时,需要在拍摄过程中给所摄的画面上增加一个时间基准,以便获得物体某一部位某时刻的速度,加速度等运动参量。由于电视摄像的帧频是固定的,所以一般电视测量的时间基准以画幅计数代之,特别是在专用高帧频电视(比普通电视帧频高数倍)中,画幅计数器更是必不可少。它将给电视图象的重放、观察带来很大方便。通常,在电视画面上增加数字,可用微计算机加之必要的硬件接口及软件来实现。但若 With the popularization and development of television technology, the application of measurement television is more and more widely. When using the TV to observe and measure the movement of an object, it is necessary to add a time reference to the taken picture during shooting so as to obtain the motion parameters such as speed and acceleration at a certain part of the object. Since the frame rate of the television camera is fixed, the time base of the general television measurement is replaced by the frame count, especially in the case of the dedicated high frame rate television (several times higher than the normal television frame rate), the frame counter is even more indispensable . It will give the replay of the television picture, bring great convenience to the observation. Usually, adding a number on the TV screen can be achieved by using a microcomputer coupled with necessary hardware interfaces and software. But if