Quaternion Entropy to Analysis of Downhill Skiing Data - Preliminary Study
- Resource Type
- Authors
- Agnieszka Szczęsna; Mateusz Janiak
- Source
- Computational Collective Intelligence ISBN: 9783030283735
ICCCI (2)
- Subject
- Nonlinear system
Inertial frame of reference
Inertial measurement unit
Computer science
Chaotic
Entropy (energy dispersal)
Quaternion
Algorithm
Process complexity
Approximate entropy
- Language
Nonlinear techniques are extremely useful to analyze the human movement within sport context. One of the most popular metric of process complexity is entropy. This work concerns application of quaternion approximation entropy for analysis of human motion during downhill skiing. Skier motion is represented as time series of orientations of two skies and chest. Orientations are coded as unit quaternions. Such approach was used to quantify chaotic behaviour in context of regularity in time series. The preliminary study discussed the results obtained from IoT system consists of three inertial measurement sensors (IMU) and smartphone.