2D Filtering

The 2D Filtering extension provides access to a library of 2D FFT filters, allowing you to apply common Fourier domain filters to gridded data in Oasis montaj. You can efficiently process and enhance gridded datasets using a wide range of geophysical and mathematical filters.

Key capabilities include:

  • Defining custom filters

  • Modifying filter-specific parameters

  • Applying up to six filters simultaneously in a single operation

The extension also includes an Interactive Spectrum Filter, a dynamic visual tool that allows you to preview filtered grids in real time. This tool features an interactive slider for adjusting filter parameters and instantly visualizing the results. It enables you to evaluate how each filter enhances specific features before applying it to the entire grid.

Working in Oasis montaj requires a project file (*.gpf). A project encompasses all items in your workspace, including:

  • Data files such as databases, grids, maps, voxels, geosurfaces, and 3D views

  • Visualization tools like histograms and scatter plots

  • Project settings, including the menus currently displayed

This structure ensures that your entire working environment is saved and easily restored.

To begin working with 2D Filtering, we recommend opening a new project and then loading the corresponding menus.

Open a New Project

  1. On the Project menu select New. The New Project dialog will open.

    You can also select Create new project from the startup dialog that appears when you launch Oasis montaj.

  2. In the New Project dialog, specify the name and location for your new project file (*.gpf), then click Save.

  3. The new project will open, enabling the main menus, toolbar icons, and the Project Explorer. These visual indicators confirm that the system is ready for use.

Load the Menus

  1. On the Project menu, select Manage Menus, or click the Manage Menus icon on the Project Explorer toolbar. The Manage Menus dialog will appear.

  2. In Base Menus, expand the Processing node, select 2D Filtering under Filtering Tools, and click OK. The menus related to the filtering tool will now appear on the main menu bar.

The menu system is designed to provide quick access to a variety of tools and guide you through the primary processing and filtering workflows.

To automatically load these menus in future projects, specify them in the Default menus field of the General Settings dialog.

Accessing Help

Once the 2D Filtering menus are loaded, click the Help button in any dialog opened from these menu items:

  • The reference topic for the current dialog will be displayed.

  • Use the Help Topics tab to navigate to other topics of interest.

  • Use the Search tab to find specific topics by entering keywords.