As I mentioned in the beginning, my data is not 2D images, but it’s multivariate time-series data. After reading many research papers, I found that 1D CNN has been a successful reference model for time-series classification tasks. That’s why I’m trying 1D CNN for my task. FYI, I’ve tried 2D CNN as well, by reshaping my data to a similar shape of 2D images, but it didn’t go well. Before designing more complicated structure such as hierarchical models or multi-scale models, I wanted to see if 1D CNN can be a better option.