A Comparative Study: Error Analysis and Model Efficiency in Event-Based Action Recognition

In the domain of event-based vision, action recognition stands as a significant challenge that pushes the boundaries of advanced computational models. This paper compares three cutting-edge architectures - Spiking Neural Networks, Graph Convolutional Neural Networks, and Video Transformer-based Networks - to determine their effectiveness in this domain. Our study extends beyond accuracy, focusing on the error nature of each model and its corresponding complexity. We observed that these models while achieving comparable accuracies, tend to make different types of mistakes. Capitalizing on this comple-mentary error phenomenon, we aim to leverage their strengths by proposing an ensemble learning strategy, which improves overall performance. Moreover, we further investigated the Video Trans-former model, retraining it on subsets of data that the Spiking Neural Network misclassified. This resulted in higher accuracy than when trained on subsets correctly classified, highlighting the Transformer's ability to learn differently and complement the Spiking Network's weaknesses. Our findings challenge the sole focus on accuracy for model efficacy emphasizing the significance of error analysis. This research provides a road map for model selection in event-based vision tasks and introduces innovative ways to integrate these models.