研究了PV插值法导致错误配准的原因，提出了通过调整灰度级数来避免。
Researched the reason why PV interpolation may lead to wrong registration, and suggested to reduce gray levels to avoid the problem.
在数据集初始位置差异较大时，IC P算法可能出现错误的配准结果。
When there is much difference between the initial configuration of the data sets, the ICP algorithm may finds a wrong result.
这样在配准过程中就可以有效地控制错误的传播。
Therefore, it is effective to control the error propagation during the matching process.
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