Light from a low Angle, but not so 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。

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Firstly, the learning ability of support vector machine is used to detect cloud in remote sensing image, and combining the information of solar Angle, cloud shadow area is detected.

首先利用支持向量机的学习性能检测影像中的云层，并利用太阳角度信息，判定云阴影区域，得到云层和云阴影的二值图。

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The rule graph of cloud layer and shadow was generated by the detection of cloud layer and shadow using support vector machine and information of solar Angle.

该方法利用支持向量机以及太阳角度信息，进行云层和阴影的检测，生成云层和阴影的规则图。

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This was when it was first pointed out that, because sunlight near the lunar poles comes in at a shallow angle, the floors of the deeper craters there might be in permanent shadow.

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With red and white light, the shadow of the object appears in the complementary color -- cyan -- and the shadows change as your angle of vision changes.

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