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.
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。
Comparing with other image re-projection methods, this method needs only two reference images and the implementation is easy and quick.
和其他基于图像的二次投影方法相比，这里仅需要两幅参考图像，且实现方法简单快速。
Compared with other image re - projection methods, this method needs only two reference images and is easy and quick to be implemented.
和其他基于图像的二次投影方法相比，这里仅需要两幅参考图像，且实现方法简单快速。
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