Can the frame size ( number of samples) be set by the user and what is the minimum frame size for feature extraction processing ( Spectra , MEL …)
The frame size can be set through the window size in the Impulse Design. For instance with data sampled at 100 Hz, a one-second window would contain 100 samples.
Regarding the feature extraction, the frame length can be set to 1 ms or even less. However this will increase the extraction time on target (you can check the
On-device performances when changing those values).
You can also get more information on processing blocks here: https://docs.edgeimpulse.com/docs/processing-blocks
I have vibration data in CSV files : first column with header “time stamped” and data per sample interval of 1/2e3 = 0.0005 seconds and a total of 2000 samples
I have 10 of these files with normal vibration data and 10 with faulty bearing vibration.
I want to extract spectral or flat features and do machine learing
Quick note on your timestamp.
timestamp values should be millisecond in our CSV ingestion format. Here you have seconds.
I just had a look at your project, it seems you solved your issue. Did it come from the timestamp in seconds instead of milliseconds?