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Human motion recognition (HMR) is playing an increasingly key role in many fields including public security, medical treatment and health care. In this paper, we propose a fractional Fourier transform (FrFT) based cadence-velocity diagram (CVD) based method, to improve the classification rate, which can effectively distinguish similar human motions in certain traditional feature domains such as the time-frequency (TF) domain. Besides, we also incorporate the feature in FrFT based CVD domain with the range feature, which can be regarded as the multi-domain feature. Then six human daily motions are then classified by the convolutional neural network (CNN) with the above multi-domain feature. Experimental results based on real data has demonstrated that the proposed method can achieve a high classification rate.
Inspec keywords: time-frequency analysis; image classification; radar signal processing; feature extraction; neural nets; signal classification; Fourier transforms; signal representation; image recognition; Doppler radar; image motion analysis
Subjects: Signal processing and detection; Radar equipment, systems and applications; Image recognition; Computer vision and image processing techniques