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Computational Model Based on Neural Network of Visual Cortex for Human Action Recognition
Jul 10, 2018Author:
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Title: Computational Model Based on Neural Network of Visual Cortex for Human Action Recognition

Authors: Liu, HH; Shu, N; Tang, QL; Zhang, WS

Author Full Names: Liu, Haihua; Shu, Na; Tang, Qiling; Zhang, Wensheng

Source: IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS, 29 (5):1427-1440; 10.1109/TNNLS.2017.2669522 MAY 2018

Language: English

Abstract: In this paper, we propose a bioinspired model for human action recognition through modeling neural mechanisms of information processing in two visual cortical areas: the primary visual cortex (V1) and the middle temporal cortex (MT) dedicated to motion. This model, named V1-MT, is composed of V1 and MT models (layers) corresponding to their cortical areas, which are built with layered spiking neural networks (SNNs). Some neuron properties in V1 and MT, such as direction and speed selectivity, spatiotemporal inseparability, and center surround suppression, are integrated into SNNs. Based on speed and direction selectivity, V1 and MT models contain multiple SNN channels, each of which processes motion information in sequences with spatiotemporal tunings of neurons at a certain speed and different directions. Therefore, we propose two operations, input signal perceiving with 3-D Gabor filters and surround inhibition processing with 3-D differences of Gaussian functions, to perform this task according to the spatiotemporal inseparability and center surround suppression of neurons. Then, neurons are modeled with our simplified integrate-and-fire model and motion information is transformed into spike trains. Afterward, we define a new feature vector: a mean motion map computed from spike trains in all channels to represent human actions. Finally, a support vector machine is trained to classify actions represented by the feature vectors. We conducted extensive experiments on public action databases, and the results show that our model outperforms other bioinspired models and rivals the state-of-the-art approaches.

ISSN: 2162-237X

eISSN: 2162-2388

IDS Number: GD7YK

Unique ID: WOS:000430729100003

PubMed ID: 28287987

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