Browsing by Author "Rasteiro, Miguel"
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- Accuracy versus complexity of MARG-based filters for remote control pointing devicesPublication . Rasteiro, Miguel ; Costelha, Hugo; Conde Bento, Luis; Assunção, PedroAlthough most current pointing devices rely on relative rotation increments, absolute orientation allows for a more intuitive interaction. However, this is difficult to implement in low-energy consumption devices since accurate fusion filters are computationally intensive. This work presents a comparative study of low-complexity filters and state-of-the-art orientation tracking systems, enabling to access complexity versus portability. A relevant set of different MARG units currently available on the market were studied under systematic tests and human subjective user analysis. Experimental results show that it is possible to obtain similar accuracy using low-complexity filters to the ones observed with state-of-the-art orientation tracking systems. © 2015 IEEE.
- Low-complexity MARG algorithms for increased accuracy in space pointing devicesPublication . Rasteiro, Miguel; Costelha, Hugo; Conde Bento, Luis; Barata, Marcio; Assunção, PedroThis paper addresses the accuracy of space pointing devices when using absolute orientation for interaction with multimedia content. Classical accurate fusion algorithms are computationally intensive, therefore their implementation in lowenergy consumption devices is a challenging task. To tackle this problem, a performance study of a relevant set of COTS MARG sensor units with low-complexity algorithms, is presented in this study. Performance evaluation tests are carried out under harsh conditions to observe the algorithms response in a non-trivial environment. The results demonstrate that the implementation of low-complexity algorithms using low-cost sensors, can provide acceptable accuracy in comparison with the more complex stateof-the-art sensors/algorithms. These results pave the way for faster adoption of absolute orientation-based pointing devices in interactive multimedia applications.