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Spatio-Temporal Digital Signal Processing for Focus Localization from array EEG

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Spatio-Temporal Digital Signal Processing for Focus Localization from array EEG

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Method: Two  independent and separable transformations are applied to the spatio-temporal data samples:

The Spatial Laplacian (SL) , which measures the saptial sharpness of a spatio-temporal sample with respect to the rest of the samples collected at the same time.

The Temporal Laplacian (TL), which measures the temporal sharpness of a spatio-temporal sample with respect to data collected before and after, but in the same electrode location.

The space-time images of these transformations are multiplied on a point-to-point basis to obtain the Spatio-Temporal Laplacian (STL) field. In this field only data samples that were sharp in both space and time are emphasized.

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The STL Field is the product of the SL Filed and the TL Filed. In the STL Field only data samples that are sharp in both space 7 Time are emphasized. 

 

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Method: Spatio-Temporal Laplacian (STL) Transformation

Results