Font recognition as important component of a recognition system is a difficulty to printed document recognition and reconstruction.
字体识别是印刷文档识别重构的重要组成部分，是目前识别技术的一个难题。
To this end, our research group has designed a recognition system for mathematical expressions in printed document.
为此，我们的研究集体提出了一种新的关于数学表达式识别的设计思想，并写出了程序。
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