Abstract: A method of stripe-terrain describing and matching based on the oriented terrain-surface feature is proposed aiming at position of a stripe-terrain.To describe the terrain of a region，the vertexes are detected from the terrain map firstly，and the vertex at the center of the region is selected as the referenced point，tangent of the terrain surface at the referenced point is selected as the referenced axis.The relative position between the vertexes and the referenced point and axis is used to construct the invariable feature of the terrain.The matching method is proposed based on the calculation and comparison of the distance of feature vector，which is robust to the similar transformation such as scale and rotation transformations.The simulated experiments have proved the validation of the algorithm and it is of great value for matching and positioning of terrains reconstructed from serial images.

Key words: terrain contour matching, oriented terrain feature, scale invariant, positioning, navigation

摘要： 针对条带地形的地形匹配定位，提出了航带地形的有向地形表面特征描述及匹配方法。在航带的一维方向上检测极值点，同时利用区域中心的极值点及其地形表面的切线作为参考，利用地形极值点相对于参考点和参考线的相对位置关系构造地形的具有不变性的特征，基于特征的距离计算和比较，实现了具有抵抗尺度变化等相似变换的地形匹配方法。仿真实验证明了该方法的有效性，对于从序列图像重建地形的匹配定位具有重要意义。

关键词: 地形匹配, 有向地形特征, 尺度不变性, 定位, 制导