摘要
针对地形特征对方向选择具有差异性的特点,提出了一种新的三维地形轮廓匹配算法.利用复数小波变换的六个可分的正负方向频带,提取地形六个不同方向的特征信息.在不同尺度下,通过六个带通复值分量,实现了由粗到精的金字塔式分层匹配.最后,仿真结果表明,合理选取匹配策略后,该算法具有较强的鲁棒性和较好的快速性.
A new algorithm of 3D-TERCOM is proposed for the diversity of terrain feature to directional selectivity. With six separable frequency bands of positive direction and negative direction tansformed by complex wavelet, six different feature information of terrain can be extracted. Under different scales, six complex subbands implement pyramid-style matching strategy from coarse level to fine level. Finally, the results prove that the method with reasonable similarity criterion has advantages of strong robustness and high operation efficiency.
出处
《战术导弹技术》
北大核心
2007年第3期69-73,共5页
Tactical Missile Technology
关键词
小波变换
复数小波
地形匹配
方向选择性
wavelet transform
complex wavelet
terrain contour matching
directional selectivity
