The stress of the crustal median layer is roughly the same direction as the deep layer.

在不同深度上表现出中、深部层应力方向较一致。

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After median filtering, image mode transforming, and "bad area" filtrating to images of soil layer, the authors extract the characteristic parameter of a image, that is gray-value, and c.

通过土壤表层图像的中值滤波、图像模式转换和“坏区”过滤，提取图像的特征参数——灰度值，并对土壤表层图像的灰度值与其含水率的关系进行了试验研究。

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