传真通信是利用扫描技术在一定距离上传输固定图像的电报系统,它可以准确地、原样地传送文件、稿件、相片、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像分解,将待发送的图像分解成很多的微小单元(称像元、像素或像点),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正比例。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 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 fax communication is as follows: first, the image is decomposed at the sending end, and the image to be sent is decomposed into many tiny units (pixel, pixel or image point), and these units are transformed into electrical signals according to a certain sequence, The amplitude of these electrical signals is proportional to the brightness of the transmitted unit. Then these electrical signals are amplified and modulated, etc., and transmitted through the transmission system