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。

关键词: 航磁, 特征提取, 图像增强, 滤波, 立体阴影图

Abstract: 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.

Key words: aeromagnetic, characteristic obtaining, image enhancement, filtering, solid-shadow map

中图分类号: 

• TN911.73