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Encoding Event-Based Gesture Data With a Hybrid SNN Guided Variational Auto-encoder

Commercial mid-air gesture recognition systems have existed for at least a decade, but they have not become a widespread method of interacting with machines. These systems require rigid, dramatic gestures to be performed for accurate recognition that can be fatiguing and unnatural. To address this limitation, we propose a neuromorphic gesture analysis system which encodes event-based gesture data at high temporal resolution. Our novel approach consists of an event-based guided Variational Autoencoder (VAE) which encodes event-based data sensed by a Dynamic Vision Sensor (DVS) into a latent space representation suitable to compute the similarity of mid-air gesture data. We show that the Hybrid Guided-VAE achieves 87% classification accuracy on the DVSGesture dataset and it can encode the sparse, noisy inputs into an interpretable latent space representation, visualized through T-SNE plots. We also implement the encoder component of the model on neuromorphic hardware and discuss the potential for our algorithm to enable real-time, self-supervised learning of natural mid-air gestures.

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