prof. RNDr. Tomáš Skopal, Ph.D.

Publikace

Approximate search in dissimilarity spaces using GA

Autoři
Bernhauer, D.; Skopal, T.
Rok
2019
Publikováno
GECCO 2019 Companion - Proceedings of the 2019 Genetic and Evolutionary Computation Conference Companion. New York: Association for Computing Machinery, 2019. p. 279-280. ISBN 978-1-4503-6748-6.
Typ
Stať ve sborníku
Anotace
Nowadays, the metric space properties limit the methods of indexing for content-based similarity search. The target of this paper is a data-driven transformation of a semimetric model to a metric one while keeping the data indexability high. We have proposed a genetic algorithm for evolutionary design of semimetric-to-metric modifiers. The precision of our algorithm is near the specified error threshold and indexability is still good. The paper contribution is a proof of concept showing that genetic algorithms can effectively design semimetric modifiers applicable in similarity search engines.

Recommender System as the Support for Binaural Audio

Autoři
Bernhauer, D.; Skopal, T.
Rok
2019
Publikováno
Augmented Reality and Virtual Reality. Cham: Springer International Publishing AG, 2019. p. 233-246. ISSN 2196-8705. ISBN 978-3-030-06245-3.
Typ
Kapitola v knize
Anotace
Virtual reality devices nowadays can effectively utilise other senses besides vision, too. The most often used secondary sense is hearing with binaural audio as VR engine. Currently, practical usage of binaural audio as the source of VR is impossible because of the inaccuracy of a general model. On the contrary, measuring the personalised parameters can be time-consuming. Our task was to prove the possibility of reconstruction of the binaural audio parameters in domestic conditions. We have focused on the design of the user interface that can be used independently on the platform. Our proposed browser-based application uses collaborative filtering as a recommender system. We have proven that sound-based navigation in axial plane is possible with 6.6° inaccuracy. The gamification and browser-based implementation make it easier for all people to find the best possible parameters. The resulting profile can be used both with fully VR environment and with semi-VR games.