Action Recognition Using Single-Pixel Time-of-Flight Detection
AbstractAction recognition is a challenging task that plays an important role in many robotic systems, which highly depend on visual input feeds. However, due to privacy concerns, it is important to find a method which can recognise actions without using visual feed. In this paper, we propose a concept for detecting actions while preserving the test subject’s privacy. Our proposed method relies only on recording the temporal evolution of light pulses scattered back from the scene. Such data trace to record one action contains a sequence of one-dimensional arrays of voltage values acquired by a single-pixel detector at 1 GHz repetition rate. Information about both the distance to the object and its shape are embedded in the traces. We apply machine learning in the form of recurrent neural networks for data analysis and demonstrate successful action recognition. The experimental results show that our proposed method could achieve on average
Share & Cite This Article
Ofodile, I.; Helmi, A.; Clapés, A.; Avots, E.; Peensoo, K.M.; Valdma, S.-M.; Valdmann, A.; Valtna-Lukner, H.; Omelkov, S.; Escalera, S.; Ozcinar, C.; Anbarjafari, G. Action Recognition Using Single-Pixel Time-of-Flight Detection. Entropy 2019, 21, 414.
Ofodile I, Helmi A, Clapés A, Avots E, Peensoo KM, Valdma S-M, Valdmann A, Valtna-Lukner H, Omelkov S, Escalera S, Ozcinar C, Anbarjafari G. Action Recognition Using Single-Pixel Time-of-Flight Detection. Entropy. 2019; 21(4):414.Chicago/Turabian Style
Ofodile, Ikechukwu; Helmi, Ahmed; Clapés, Albert; Avots, Egils; Peensoo, Kerttu M.; Valdma, Sandhra-Mirella; Valdmann, Andreas; Valtna-Lukner, Heli; Omelkov, Sergey; Escalera, Sergio; Ozcinar, Cagri; Anbarjafari, Gholamreza. 2019. "Action Recognition Using Single-Pixel Time-of-Flight Detection." Entropy 21, no. 4: 414.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.