visual3d:documentation:emg:filtering:integrate_emg
Differences
This shows you the differences between two versions of the page.
| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| visual3d:documentation:emg:filtering:integrate_emg [2024/06/18 13:27] – sgranger | visual3d:documentation:emg:filtering:integrate_emg [2024/07/17 15:45] (current) – created sgranger | ||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | ====== | + | ====== |
| - | ==== Computing the EMG Envelope using rectify and lowpass filter | + | ===== Linear Envelope ===== |
| + | |||
| + | === Computing the EMG Envelope using rectify and lowpass filter === | ||
| This section will compute the EMG Envelope using rectify and lowpass filter. Rectify takes the absolute value of every element of a signal. Visual3D calculates signal rectification using the following formula: x(ti)= abs(x(ti)) | This section will compute the EMG Envelope using rectify and lowpass filter. Rectify takes the absolute value of every element of a signal. Visual3D calculates signal rectification using the following formula: x(ti)= abs(x(ti)) | ||
| - | ==== Lowpass Filter Cutoff | + | === Lowpass Filter Cutoff === |
| The default lowpass filter in Visual3D is a fourth order butterworth filter. | The default lowpass filter in Visual3D is a fourth order butterworth filter. | ||
| Line 19: | Line 21: | ||
| If your EMG signals are sampled at 1000 Hz, the highest cutoff frequency is 393 Hz. | If your EMG signals are sampled at 1000 Hz, the highest cutoff frequency is 393 Hz. | ||
| - | ==== Example Script | + | === Example Script === |
| The highpass filter is not part of the linear envelope, but is used to remove the [[Visual3D: | The highpass filter is not part of the linear envelope, but is used to remove the [[Visual3D: | ||
visual3d/documentation/emg/filtering/integrate_emg.1718717264.txt.gz · Last modified: 2024/06/18 13:27 by sgranger