Arsenault H H, Séguin M K, Brousseau N
Appl Opt. 1974 May 1;13(5):1013-7. doi: 10.1364/AO.13.001013.
An optical processor has been used to filter aeromagnetic contour maps in order to obtain information on underground magnetic ore deposits. This was accomplished by directional filtering of the spatial Fourier transform of the contour map. The directional filtering yields maps of gradients having given directions. A digital analysis was also performed on the data so that the feasibility of the optical technique could be evaluated. The results obtained so far suggest that a systematic filtering of aeromagnetic maps can be carried out at low cost and that the filtered maps can yield useful information to the interpreter.
一种光学处理器已被用于对航磁等值线图进行滤波，以便获取有关地下磁性矿床的信息。这是通过对等值线图的空间傅里叶变换进行方向滤波来实现的。方向滤波产生具有给定方向的梯度图。还对数据进行了数字分析，以便评估光学技术的可行性。目前获得的结果表明，可以低成本地对航磁图进行系统滤波，并且滤波后的图可以为解释人员提供有用的信息。
