一种改进的地磁平缓区的地磁匹配算法

地磁匹配在磁场特征不明显的区域往往难以得到理想的匹配结果,在分析误匹配原因的基础上提出了一种改进的匹配算法。该算法先基于两个地磁矢量进行粗匹配,进一步缩小搜索范围,然后以地磁信息熵为目标函数,利用粒子群优化算法进行精匹配以提高磁场平缓区的匹配结果。算法尽可能少地引入地磁矢量,又保证了一定的匹配精度,兼顾了地磁基准图制图的复杂性与匹配精度。

A Modified Matching Method in Areas with Less Obvious Magnetic Features

Magnetic matching always cannot reach good results in areas with less obvious magnetic features,by analyzing the mechanism of false matching,a modified matching method is put forward. Firstly,two magnetic features and the correlation principle are used for coarse matching to narrow the search range. Then,PSO algorithm,which uses magnetic entropy as its objective function,is utilized to improve matching results. The modified matching method introduces as few geomagnetic features as possible,and guarantees the matching accuracy,giving consideration to both the complexity of making magnetic maps and matching accuracy.