锈蚀部位主要在棱角、拐角、边缘和角接焊缝处。

The rusty sites are mostly at the corners, edges and their welding lines.

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通过对焊缝图像进行广义模糊增强处理表明，该算法在增强对比度同时又可较好保持边缘。

Using this algorithm to dealing with weld image, the contrast ratio can be improved and the edges can be preserved well.

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上述定位标记和识别标记均应放在胶片的适当位置，并离焊缝边缘至少5 mm(图3)。

The above symbols should be put in the proper position of film, and the distance from weld edge should be at least 5mm (see picture3).

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