Hello everyone. I hope y’all are well!
My name is Juan Sebastian Conde. Recently, I have been doing some personal research regarding the use of machine learning and deep learning techniques to identify and determine important information in biosignals from ECG (electrocardiogram), Cortisol sensing analysis, EEG signals for anxiety and stress, among others.
During my research, I have found a very innovative approach based on the construction of recurrent plots (recurrent images) based on these signals. The idea is founded on the use of image recognition techniques to determine and categorise important events.
You can check here the underlying principle:
Garcia-Ceja, Enrique, Md Zia Uddin, and Jim Torresen. “Classification of recurrence plots’ distance matrices with a convolutional neural network for activity recognition.” Procedia computer science 130 (2018): 157-163.
Now, there is a particular question that I would like to ask anyone interested in this topic. But first, I would like to provide some context:
- You are running an experiment with a couple of subjects. These subjects have sensors connected to their bodies, recording at bio-signals at 100Hz. In the experiment, each subject is sitting down and is watching at a screen that provides TWO simple instructions ( stand-up or lift your right arm). Each instruction is given at 8 seconds intervals.
Now, to identify the potential bio-signals driven by these actions, the data for the analysis consists in:
- Raw signal from the sensor
- The times for the markers given the instructions to the subjects.
Okay?
Now comes the fun part. As you know, every subject is different, and their response might be different; additionally, each subject might execute those actions with a certain delay after each instruction is shown on the screen.
Since we are working with images that are built based on the signals, and the signals are changing all the time, it is assumed that this becomes a movie.
Is there a way to identify similar images that somehow correspond to those actions?
I imagine that there should be a technique that provides you with all the possible “classes” of images in the movie. However, there should be a certain particular repeating class that can be identified after each instruction is given.
Let me know your thoughts!