随着计算机的日益普及，人们已经不能满足于观看充斥着图形和符号的屏幕。扫描仪的出现丰富了人们的视觉，同时给人们提供了新的输入手段。图文混排软件的出现，结束了以往有只能排文而不能加图的排版模式，使能排出图文并茂的文件。光学字符自动识别系统（ＯＣＲ）的到来，从 With the increasing popularity of computers, people can no longer be satisfied watching the screen filled with graphics and symbols. The advent of scanners enriches people’s vision and at the same time gives people new input. The emergence of graphic mixing software, the end of the past can only row can not add typesetting model, enabling the discharge of illustrated documents. Optical Character Recognition System (OCR) comes from