传真技术作为一种通讯手段,广泛地应用于报纸传真、气象预报、真迹电报,新闻照片、公安侦察和工程制造中。对于远距离传递永久性记录的图象和文件而言,传真技术是目前唯一的通讯手段。特别是我国使用结构复杂、形状繁多的汉字,它给编码、存储及其传输带来极大的不便,因此传真技术作为汉字图形的直接传输,呈现出它的优越性。据文献报导,使用着几千个汉字的日本,由于上述原因,传真机的销售量每年递增30％。并且预计这一趋势在今后几年内不会有衰落的迹象。传真机按功能和特点,可以分为模拟传真机(俗称 Fax technology, as a means of communication, is widely used in newspaper faxes, meteorological forecasts, authentic telegrams, news photos, public security reconnaissance and engineering. Facsimile technology is currently the only means of communication for images and documents that carry permanently recorded images over long distances. In particular, the use of Chinese characters with complex structures and numerous shapes in our country brings great inconvenience to coding, storage and transmission. As a direct transmission of Chinese characters, fax technology shows its superiority. According to the literature, the number of fax machines in Japan, which uses thousands of Chinese characters, has been increasing by 30% each year. And it is not expected that this trend will decline in the next few years. Fax machines by function and characteristics, can be divided into analog fax machines (commonly known as