聚类和识别实验表明双投影归一化向量不仅计算简单，而且对同种字体不同字号的英文字符识别可达到较好的结果。

Some experiments show that double projection normalization vectors are not only easy to be calculated, but also good for recognizing English characters with the same font but in different sizes.

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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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