20.500.12556/RUL-128749 Quantitative contact-less estimation of energy expenditure from video and 3D imagery Measurement of energy expenditure is an important tool in sport science and medicine, especially when trying to estimate the extent and intensity of physical activity. However, most approaches still rely on sensors or markers, placed directly on the body. In this paper, we present a novel approach using a fully contact-less, fully automatic method, that relies on computer vision algorithms and widely available and inexpensive imaging sensors. We rely on the estimation of the optical and scene flow to calculate Histograms of Oriented Optical Flow (HOOF) descriptors, which we subsequently augment with the Histograms of Absolute Flow Amplitude (HAFA). Descriptors are fed into regression model, which allows us to estimate energy consumption, and to a lesser extent, the heart rate. Our method has been tested both in lab environment and in realistic conditions of a sport match. Results confirm that these energy expenditures could be derived from purely contact-less observations. The proposed method can be used with different modalities, including near infrared imagery, which extends its future potential. physical activity energy expenditure computer vision optical flow scene flow heart rate support vector machine RBF kernel KCF tracker Microsoft Kinect time-of-flight sensor squash telesna aktivnost energijska poraba računalniški vid optični tok prostorski tok true false true Angleški jezik Slovenski jezik Članek v reviji 2021-07-27 12:39:05 2021-07-27 12:39:07 2022-09-07 04:16:58 0000-00-00 00:00:00 2018 0 0 32 str. iss. 8, art. 2435 Vol. 18 Aug. 2018 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2018-07-26 004.8:796 1424-8220 10.3390/s18082435 12120148 RAZ_Koporec_Gregor_2018.pdf RAZ_Koporec_Gregor_2018.pdf 1 607FA48151673A572C1797C8AF14AE67 368f37dcbcd9c75a156f4421b53c5cfea78754c69ef28553bfbc85c4b61992ba a7ac5586-eec7-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145599 http://www.mdpi.com/1424-8220/18/8/2435 1 b39e95c3-eec6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145598 Fakulteta za elektrotehniko Fakulteta za šport 0 0 0