Feature recognition system and method for electroencephalogram signals
A technology of EEG signal and feature recognition, applied in medical science, diagnosis, psychological devices, etc., can solve problems such as cumbersome preparation process, reduced accuracy of emotion recognition, and increased algorithm complexity
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[0050] Such as figure 2 As shown, this embodiment includes the following steps:
[0051] Step 1: 6 subjects aged between 20 and 24 who are physically and mentally healthy and without mental illness watch movie clips with four emotional categories, and induce their four emotions of happiness, sadness, fear and calm. Each emotion There are 6 movie clips, for a total of 24 movie clips. While watching, according to figure 1 The indicated electrode positions collect the EEG signals of the subjects. Each subject did three experiments, a total of 18 sets of experimental data.
[0052] Step 2: Pass the EEG data collected in each experiment through a band-pass filter in the range of 1-75 Hz to filter out noise and artifacts.
[0053] Step 3: Perform short-time Fourier transform on the preprocessed EEG signal to obtain energy features in five frequency bands, and then extract differential entropy features.
[0054] Step 4, use the linear dynamical system method to perform feature ...
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