数据的输入是计算机应用中的一个关键问题。由于传感器技术及微电子技术的发展,使得许多场合下物理量的输入或采集能够高速实时地得以实现。但对许多非物理量的文字或数据的输入计算机问题,还只能依靠人工键入的方法。由于工作量大且效率低,这种输入方法远远不能适应计算机高速处理数据的能力,阻碍了计算机在许多领域功能的发挥。实现文字数据自动输入计算机,必将大大开拓计算机的应用领域。目前实现这一目标有 Data input is a key issue in computer applications. Due to the development of sensor technology and microelectronic technology, the input or collection of physical quantities in many occasions can be realized at high speed and in real time. But for many nonphysical text or data input computer problems, can only rely on manual typing. Due to the heavy workload and low efficiency, this input method is far from being able to adapt to the ability of computers to process data at high speed, impeding the performance of computers in many fields. Achieve text data automatically enter the computer, bound to greatly open up computer applications. There are so far to achieve this goal