Differences

This shows you the differences between two versions of the page.

--- visual3d:documentation:emg:filtering:emg_envelope [2024/06/19 13:29] – removed sgranger
+++ visual3d:documentation:emg:filtering:emg_envelope [2024/07/17 15:45] (current) – created sgranger
@@ Line 1: / Line 1: @@
+====== EMG Envelope ======
+**If you are using a version of Visual3D older than 4.94, you will need to use the following commands to specify the frame window in seconds (as opposed to frames).**
+<code>
+! -------------------------------------------
+! apply a bandpass filter to the EMG signals
+! -------------------------------------------
+Highpass_Filter
+/Signal_Types=ANALOG
+/SIgnal_Names=EMG1+EMG2+EMG3
+/Signal_Folder=ORIGINAL
+! /Result_Suffix=
+! /Result_Folder=PROCESSED
+! /Filter_Class=BUTTERWORTH
+/Frequency_Cutoff= 50
+/Num_Reflected= 0
+/Total_Buffer_Size=100
+/Num_Bidirectional_Passes=1
+;
+Lowpass_Filter
+/Signal_Types=ANALOG
+/SIgnal_Names=EMG1+EMG2+EMG3
+/Signal_Folder=PROCESSED
+! /Result_Suffix=
+! /Result_Folder=PROCESSED
+! /Filter_Class=BUTTERWORTH
+/Frequency_Cutoff= 500
+/Num_Reflected= 0
+/Total_Buffer_Size=100
+/Num_Bidirectional_Passes=1
+;
+! -------------------------------------------
+! copy the analog rate from the c3d parameter
+! to a metric value
+! -------------------------------------------
+Metric_From_Parameter
+/METRIC_NAME=ANALOG_RATE
+/PARAMETER_GROUP=ANALOG
+/PARAMETER_NAME=RATE
+;
+! -------------------------------------------
+! compute the number of frames equivalent to
+! a 100 ms window
+! -------------------------------------------
+Evaluate_Expression
+/EXPRESSION=1+0.1*METRIC::PROCESSED::ANALOG_RATE
+/RESULT_NAME=RMS_FRAMES
+/RESULT_TYPE=METRIC
+! /RESULT_FOLDER=PROCESSED
+;
+! -------------------------------------------
+! create a pipeline parameter of the RMS window
+! -------------------------------------------
+Set_Pipeline_Parameter_To_Data_Value
+/PARAMETER_NAME=RMS_FRAMES
+/SIGNAL_TYPES=METRIC
+/SIGNAL_NAMES=RMS_FRAMES
+/SIGNAL_FOLDER=PROCESSED
+;
+! --------------------------------------------
+! compute a moving rms with a window of 100 ms
+! --------------------------------------------
+Moving_RMS
+/SIGNAL_TYPES=ANALOG
+/SIGNAL_NAMES=EMG1+EMG2+EMG3
+/SIGNAL_FOLDER=PROCESSED
+! /RESULT_SUFFIX=
+/RESULT_FOLDER=RMS
+/NUM_WINDOW_FRAMES=::RMS_FRAMES
+;
+</code>