|Code Listing by Carlos Gias|
It creates blocks of surrogate data with the same second order properties as the original time series dataset by transforming the original data into the frequency domain, randomizing the phases simultaneously across the time series and converting the data back into the time domain.
The gradient image can be used to segment objects from a colour image making use of all the spectral information simultaneously.
It calculates the direction of maximum rate of change for each pixel from the partial derivatives along each...
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