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Experimental Comparison between Event and Global Shutter Cameras

Ondřej Holešovský, Radoslav Škoviera, Václav Hlaváč, Roman Vítek
2021 Sensors  
We compare event-cameras with fast (global shutter) frame-cameras experimentally, asking: "What is the application domain, in which an event-camera surpasses a fast frame-camera?" Surprisingly, finding the answer has been difficult. Our methodology was to test event- and frame-cameras on generic computer vision tasks where event-camera advantages should manifest. We used two methods: (1) a controlled, cheap, and easily reproducible experiment (observing a marker on a rotating disk at varying
more » ... eds); (2) selecting one challenging practical ballistic experiment (observing a flying bullet having a ground truth provided by an ultra-high-speed expensive frame-camera). The experimental results include sampling/detection rates and position estimation errors as functions of illuminance and motion speed; and the minimum pixel latency of two commercial state-of-the-art event-cameras (ATIS, DVS240). Event-cameras respond more slowly to positive than to negative large and sudden contrast changes. They outperformed a frame-camera in bandwidth efficiency in all our experiments. Both camera types provide comparable position estimation accuracy. The better event-camera was limited by pixel latency when tracking small objects, resulting in motion blur effects. Sensor bandwidth limited the event-camera in object recognition. However, future generations of event-cameras might alleviate bandwidth limitations.
doi:10.3390/s21041137 pmid:33561981 pmcid:PMC7915618 fatcat:2vuyocxbxncn5nbk5njrxo6tvu

Teaching robots to imitate a human with no on-teacher sensors. What are the key challenges? [article]

Radoslav Skoviera, Karla Stepanova, Michael Tesar, Gabriela Sejnova, Jiri Sedlar, Michal Vavrecka, Robert Babuska, Josef Sivic
2019 arXiv   pre-print
In this paper, we consider the problem of learning object manipulation tasks from human demonstration using RGB or RGB-D cameras. We highlight the key challenges in capturing sufficiently good data with no tracking devices - starting from sensor selection and accurate 6DoF pose estimation to natural language processing. In particular, we focus on two showcases: gluing task with a glue gun and simple block-stacking with variable blocks. Furthermore, we discuss how a linguistic description of the
more » ... task could help to improve the accuracy of task description. We also present the whole architecture of our transfer of the imitated task to the simulated and real robot environment.
arXiv:1901.08335v1 fatcat:nizj3a4fwzbk7dscdsyccmikfm

Pair-Wise Temporal Pooling Method for Rapid Training of the HTM Networks Used in Computer Vision Applications

Svorad Stolc, Ivan Bajla, Kristián Valentín, Radoslav Skoviera
2012 Computing and informatics  
In the paper, several modifications to the conventional learning algorithms of the Hierarchical Temporal Memory (HTM) -a biologically inspired largescale model of the neocortex by Numenta -have been proposed. Firstly, an alternative spatial pooling method has been introduced, which makes use of a random pattern generator exploiting the Metropolis-Hastings algorithm. The original inference algorithm by Numenta has been reformulated, in order to reduce a number of tunable parameters and to
more » ... e its computational efficiency. The main contribution of the paper consists in the proposal of a novel temporal pooling methodthe pair-wise explorer -which allows faster and more reliable training of the HTM networks using data without inherent temporal information (e.g., static images). While the conventional temporal pooler trains the HTM network on a finite segment of the smooth Brownian-like random walk across the training images, the
dblp:journals/cai/StolcBVS12 fatcat:ayov5tc755fwlaeizrjk4yy3ka

Imitrob: Imitation Learning Dataset for Training and Evaluating 6D Object Pose Estimators [article]

Jiri Sedlar, Karla Stepanova, Matus Tuna, Radoslav Skoviera, Jan Kristof Behrens, Gabriela Sejnova, Josef Sivic, Robert Babuska
2022 arXiv   pre-print
Radoslav Skoviera, Jan Kristof Behrens, and Robert Babuska were supported by the European Regional Development Fund under the project Robotics for Industry 4.0 (reg. no.  ...  Karla Stepanova, Radoslav Skoviera, and Gabriela Sejnova were supported by the Technological Agency of CR under the grant Collaborative workspace of the future (reg. no. FV40319).  ...  The dataset was created by Jiri Sedlar, Karla Stepanova, Radoslav Skoviera, Gabriela Sejnova, Jan K.  ... 
arXiv:2209.07976v2 fatcat:2ty6yisyyrgxxlr2h44d6epkre

Selected Aspects of Ceremonies and Audiences Regarding Constantine and Methodius' Stay in Rome. A Question of Processions and Architecture
VYBRANÉ ASPEKTY CEREMÓNIÍ A AUDIENCIÍ SPOJENÝCH S POBYTOM KONŠTANTÍNA A METODA V RÍME. OTÁZKY PROCESIÍ A ARCHITEKTÚRY

Martin Husár
2016 Konštantínove listy/Constantine s Letters  
In BARTOŇKOVÁ, Dagmar -VEČERKA, Radoslav (ed.).  ...  ŠKOVIERA, Stereotypy v interpretáciách, s. 15, 22, 23. ŠKOVIERA, Liturgia cyrilometodskej, s. 112 -119, 129. literárnymi prameňmi. Z nich treba spomenúť najmä Ordo 5 Romanus Primus, 6 tzv.  ... 
doi:10.17846/cl.2016.9.1.29-38 fatcat:apltwoqj6rb7hac6o4m76cjinm

K problematike kňazskej a biskupskej konsekrácie sv. Gorazda

Andrej Botek
2020 Historický ?asopis  
RATKOŠ, ref. 2, s. 201; BARTOŇKOVÁ, Dagmar -HAVLÍK, Lubomír -HRBEK, Ivan -LUDVÍKOVSKÝ, Jaroslav -VEČERKA, Radoslav (eds.). Magnae Moraviae Fontes Historici III.  ...  36 ŠKOVIERA, ref.1, s. 157. 37 STANISLAV, ref. 1, s. 74; ŠKOVIERA, ref. 1, s. 49. 38 LACKO, ref. 26, s. 128. 39 ŠKOVIERA, ref.1, s. 157. 40 STANISLAV, ref. 1, s. 58tejto udalosti.  ... 
doi:10.31577/histcaso.2020.68.3.7 fatcat:rqdxlvdnhvgodggfubuapg5mzm

Language and Linguistics in Move. In Honour of Slavomír Ondrejovič. Ed. S. Mislovičová. Bratislava: Veda, vydavatel'stvo SAV 2008. 572 s

Stanislava Zajacová
2010 Jazykovedný Časopis  
Škoviera sa pokúša na základe niektorých indícií datovať vznik spisu, určiť možnú identitu a miesto pôsobenia autora a načrtáva jeho vzdelanostný profil.  ...  -Radoslav P a vl í k (Klasifikácia spoluhlások zo sluchového hľadiska) poukazuje na niektoré nedostatky v auditívnej klasifikácii konsonantov v domácej aj zahraničnej literatúre.  ... 
doi:10.2478/v10113-009-0025-8 fatcat:hh5yccisfbd6vftpbyu4y35a3u

MQA: Answering the Question via Robotic Manipulation [article]

Yuhong Deng, Di Guo, Xiaofeng Guo, Naifu Zhang, Huaping Liu, Fuchun Sun
2021 arXiv   pre-print
IEEE, 2013. [25] Gabriela Sejnova, Michal Vavrecka, Michael Tesar, and Radoslav Skoviera. Exploring logical consistency and viewport sensitivity in compositional vqa models.  ... 
arXiv:2003.04641v3 fatcat:5lervjbo2fgehpkeojovcilhv4

The Contribution of Ss. Cyril and Methodius to Culture and Religion

Martin Hetényi, Peter Ivanič
2021 Religions  
Regarding this oldest preserved Old Church Slavonic document, the leading Czech Slavist Radoslav Večerka assumed that its original text was drafted by St.  ...  This liturgy contains the previously published fragmentary Glagolitic codex Sinai 5/N and manuscripts from later periods ( Škoviera 2010, pp. 198-210) .  ... 
doi:10.3390/rel12060417 fatcat:xk3x7i73gzamldi5lyakk62drm

SLAVICA SLOVACA SLAVISTIKA Ročník 49 • 2014 • 2 ORGÁN SLAVISTICKÉHO ÚSTAVU JÁNA STANISLAVA SAV A SLOVENSKÉHO KOMITÉTU SLAVISTOV Hlavný redaktor: Peter Žeňuch Redakčná rada

Michajlova Desislava, Mojmír Atanasova, Václav Benža, Mária Čermák, Ján Dobríková, Júlia Doruľa, Adriana Dudášová-Kriššáková, Emil Ferenčíková, Martin Horák, Jaromír Hurbanič, Ján Krško, Šimon Lukačka (+5 others)
unpublished
Škoviera, Andrej: : Nad slovenským prekladom božskej liturgie byzantsko-slovanského obradu.  ...  В.: Київські ..., s. 41. 11 Schaeken, J.: Die Kiever ..., s. 8. 12 Škoviera, A.: Liturgia cyrilo-metodskej misie na Veľkej Morave.  ... 
fatcat:fdsngzelrndphpdboohvuztwby