一般采用缺陷边缘或缺陷形状中心作为匹配点进行视差计算，实验表明此类方法具有很大误差。
The edge or shape center of the defect is often adopted as matching points. But experimental results show that the methods can bring great errors.
在那个形状不规则的湖的中心之外，有一个喷泉。
Located off-centre in the irregularly shaped lake was a fountain.
然而，在2012年，船体形状是这项工作的中心，所以现代电动工具被用来雕刻橡树木板，然后再用史前工具进行修整。
In 2012, however, the hull shape was at the centre of the work, so modern power tools were used to carve the oak planks, before turning to prehistoric tools for finishing.
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