浸出液中的铬可通过水解沉淀法以氢氧化铬的形态除去，铬的脱除率达94.44 %。
The chromium in the leach solution can be removed as chromium hydroxide by using a hydrolysis precipitation process and the efficiency of chromium removal reaches 94.44%.
其次，利用形态学运算，对已除去噪声的二值SAR图像进行边缘提取，并对边缘图像进行形态学区域开运算，以去除较小的区域。
Secondly, the binary SAR image is processed by using morphological operations to extract edges of the object and remove smaller areas. Then lines are extracted by Hough transform.
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