Underwater terrain matching algorithm based on adaptive grid digital depth model

被引：0
|
作者：
Liu X.-P. [1 ,2 ]
Zhang L.-H. [1 ,2 ]
Jia S.-D. [1 ,2 ]
Cao H.-B. [1 ,2 ]
机构：
[1] Department of Hydrography and Cartography, Dalian Naval Academy, Dalian
[2] Key Laboratory of Hydrographic Surveying and Mapping of PLA, Dalian Naval Academy, Dalian
来源：
Zhang, Li-Hua (zlhua@163.com) | 1600年 / Editorial Department of Journal of Chinese Inertial Technology卷 / 25期
关键词：
Adaptive grid; Digital depth model; Terrain correlation; Underwater matching;
D O I：
10.13695/j.cnki.12-1222/o3.2017.04.012
中图分类号：
学科分类号：
摘要：
The underwater terrain aided matching algorithm does not take into account that the grid space of reference map should automatically be adjusted with seabed terrains. To solve this problem, a new terrain matching algorithm based on adaptive Digital Grid Model is presented. First, an adaptive grid model based on quadtree is put forward to improve its local grid evaluation index and the construction method. Then, the strategy used to select the matching regions is designed, and the algorithm for calculating the track depths ready to be matched is given. Finally, the topographic correlation combination operator for object matching and localization is established. Experiment results show that the proposed method is superior to the traditional algorithm based on regular Digital Depth Model in that: 1) the new method can capture more precious location in the areas with substantial features; 2) the new method can avoid the situation that more obvious terrain features lead to more lower location precision; and 3) the new method can significantly overcome the system error's influence on the location precision. © 2017, Editorial Department of Journal of Chinese Inertial Technology. All right reserved.
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页码：488 / 494
页数：6
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