本文分析了一般屏幕点阵汉字放大的方法及不足，提出使用线性平滑法提高汉字放大字符质量的思想，给出了线性平滑法实现高质量汉字放大的方法。

In this paper, the principles and defects of enlarging Chinese on screen are analyzed Then, a method is given to enlarge high -quality Chinese on screen by using linear-smooth.

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点阵字体符号在放大时质量一定会下降，而向量符号则不会。

The quality of the glyphs rendered from bit-map fonts always drops when they are scaled up, while that from vector fonts does not.

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