为什么他们没有像文艺复兴时期的欧洲艺术家那样发现几何透视法呢？

Why did they not discover the geometric perspective as European artists did in the Renaissance?

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探讨了一种利用平面迹线和几何作图法，作无灭光线下透视阴影的新方法。

This paper presents a new method of drawing perspective shade and shadow in parallel rays, which makes use of plane trace and geometrical drawing method.

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然后运用相关的几何与透视理论，对基于计算机视觉的车轮定位参数的测量原理进行分析探讨。

Then it USES relevant geometric theories and perspective theories to analyze the measuring principles of wheel positioning parameters which are based on computer vision.

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