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近年来，数字式成像技术发展迅速，其部分影像产品已可与传统银盐影像相媲美。一般认为，数字化影像技术发展经历了三阶段：第一阶段，八十年代初发展起来的静视频系统（SV），特点是采用模拟信号并依据于TV系统第二阶段，八十年代末发展起来的电子化照相系统（EP），特征是将S
In recent years, digital imaging technology has developed rapidly, some of its imaging products have been comparable with the traditional silver salt imaging. It is generally believed that digital video technology has undergone three stages of development: the first stage, the early 1980s developed a static video system (SV), characterized by the use of analog signals and based on the TV system in the second phase, the development of the late eighties Electronic Photographic System (EP), characterized by the S