Difference between revisions of "Geopsy"
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*[[Geopsy:Groups|Groups of signals]] | *[[Geopsy:Groups|Groups of signals]] | ||
*[[Geopsy:Preferences|Preferences]] | *[[Geopsy:Preferences|Preferences]] | ||
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== Signal viewers == | == Signal viewers == | ||
Revision as of 11:26, 4 June 2009
Tutorials
Database
This section explains how to work with a Geopsy database. Creating a database on a permanent storage (disk) is not a mandatory step. You can use Geopsy to view and to process signals on single files basis. However, you would miss a number of interesting features such as grouping of signals, storage of header modification and automatic storage of processed signals.
- Introduction
- Import signal files
- Signal drag and drop mechanism
- Open, Close and Save a database
- Groups of signals
- Preferences
- Editing header information
Signal viewers
Basic signal processing
Basic signal processing methods are provided for fast analysis. By contrast with Tools, they execute only one simple action (filter, cut,...). All operations can be started interactively from the Waveform menu or through a scripting engine (Waveform console or Waveform command line).
Methods that process individually all signals:
- Subtract value
- Subtract signals
- Multiply
- Filter
- Automatic gain control
- Whiten
- Clip
- Phase shift
- Over sample
- Taper
- Cut
- Merge
- Decimate amplitude
- Decimate time
Special methods that process individually all signals:
Methods that process several signals together:
They all apply to the currently active Signal Viewer. The original signals are never altered. Operations are applied to a temporary copy (Temporary signals), automatically removed once there is no more Signal Viewer referring to it. Each method is performed in a specific domain (e.g. time of frequency). If the signals of the active Signal Viewer are not in the right domain, they are internally converted with the Fast Fourier Transform before processing. The initial domain is restored after processing. Results of a transformation can be saved permanently into the current Signal database or exported to a file (Export signals).
