传真通信是利用扫描技术在一定距离上传输固定图象的电报系统,它可以准确地、原样地传送文件、稿件、象片、图表、报纸样张等书面信息。传真通信的原理是:在发送端首先进行图象分解,将待发送的图象分解成很多的微小单元(称象元、象素或象点),并依照一定的顺序,将这些单元转变成电信号,这些电信号的幅度与所发送的单元亮度成比例。然后将这些电信号经放大调制等处理后,通过传输系统传送到接收端,在接收端将接收到的电信号加 Fax communication is the use of scanning technology to transmit fixed images over a distance Telegraph system, which can accurately and directly send documents, manuscripts, photos, charts, newspaper proofs and other written information. The principle of facsimile communication is that firstly the image is decomposed at the sending end, and the image to be sent is decomposed into many tiny units (called pixel, pixel or image point), and according to a certain sequence, the units are transformed into Electrical signals, the amplitude of which is proportional to the transmitted unit brightness. And then these electrical signals by amplification and modulation, etc., after transmission through the transmission system to the receiver, the receiver will receive the signal plus