shadow angle

The analysis results of the produce of shadow and the relation among the height of target, depression angle of radar and shadow show that it is possible to extract 3-D geometric features extraction from SAR target in high-resolution SAR imagery.

分析了目标阴影产生的原因，给出了目标高度与雷达俯仰角和阴影的关系，指出在高分辨SAR图像中可以基于阴影提取目标三维几何特征。

Light low angle, but not low that your subject is obscured by its own shadow.

请保持光源处在较低的角度, 但也不要放的太低以至于你的主题因为处于自身的阴影而模糊不清.

In the paper we acquire a result by making experiments repeatedly. When making perspective shade and shadow, we can increase sense of beauty in architectural drawing by using height angle of ray between 30 ° and 40 °.

通过反复作图试验，得出画建筑效果图的透视阴影时，30°～40°的光线角度能增强建筑效果图美感的结论。