摘要
针对在航磁等值线图上标定地球磁场梯度特征的问题,提出立体阴影处理和梯度特征线条化的处理方法。从磁场数据提取原始位置关系,利用立体光照处理技术以及方向滤波,获得航磁数据的梯度分布图。阴影和细化后的方向滤波实验结果表明图像地表特征显示充分,且对于叠加分析具有重要价值。
To meet the needs of labeling magnetic gradient characteristic of aeromagnetic contour map, methods based on solid-shadow algorithm and directional filtering technique are presented. After relative ubiety of magnetic field data is distilled, two types of graded distribution are obtained by solid-shadow algorithm and directional filtering technique respectively. The results of solid-shadow algorithm and filter-refinement processing make surface gradient feature very sharp and effective, which is valuable for overlap analysis.
出处
《计算机工程》
CAS
CSCD
北大核心
2009年第16期206-208,共3页
Computer Engineering
关键词
航磁
特征提取
图像增强
滤波
立体阴影图
aeromagnetic
characteristic obtaining
image enhancement
filtering
solid-shadow map
