| 1. |
- Yun, Yixiao, 1987, et al.
(författare)
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Maximum-Likelihood Object Tracking from Multi-View Video by Combining Homography and Epipolar Constraints
- 2012
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Ingår i: 6th ACM/IEEE Int'l Conf on Distributed Smart Cameras (ICDSC 12), Oct 30 - Nov.2, 2012, Hong Kong. - 9781450317726 ; , s. 6 pages-
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Konferensbidrag (refereegranskat)abstract
- This paper addresses problem of object tracking in occlusion scenarios, where multiple uncalibrated cameras with overlapping fields of view are used. We propose a novel method where tracking is first done independently for each view and then tracking results are mapped between each pair of views to improve the tracking in individual views, under the assumptions that objects are not occluded in all views and move uprightly on a planar ground which may induce a homography relation between each pair of views. The tracking results are mapped by jointly exploiting the geometric constraints of homography, epipolar and vertical vanishing point. Main contributions of this paper include: (a) formulate a reference model of multi-view object appearance using region covariance for each view; (b) define a likelihood measure based on geodesics on a Riemannian manifold that is consistent with the destination view by mapping both the estimated positions and appearances of tracked object from other views; (c) locate object in each individual view based on maximum likelihood criterion from multi-view estimations of object position. Experiments have been conducted on videos from multiple uncalibrated cameras, where targets experience long-term partial or full occlusions. Comparison with two existing methods and performance evaluations are also made. Test results have shown effectiveness of the proposed method in terms of robustness against tracking drifts caused by occlusions.
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| 2. |
- Ferro, Nicola, et al.
(författare)
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PROMISE Retreat Report Prospects and Opportunities for Information Access Evaluation
- 2013
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Ingår i: ACM SIGIR Forum. - : Association for Computing Machinery (ACM). - 0163-5840 .- 1558-0229. ; 46:2, s. 60-84
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The PROMISE network of excellence organized a two-days brainstorming workshop on 30th and 31st May 2012 in Padua, Italy, to discuss and envisage future directions and perspectives for the evaluation of information access and retrieval systems in multiple languages and multiple media. This document reports on the outcomes of this event and provides details about the six envisaged research lines: search applications; contextual evaluation; challenges in test collection design and exploitation; component-based evaluation; ongoing evaluation; and signal-aware evaluation. The ultimate goal of the PROMISE retreat is to stimulate and involve the research community along these research lines and to provide funding agencies with effective and scientifically sound ideas for coordinating and supporting information access research.
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| 3. |
- Dobnik, Simon, 1977
(författare)
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Coordinating spatial perspective in discourse
- 2012
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Ingår i: Proceedings of the Workshop on Vision and Language 2012 (VL'12): The 2nd Annual Meeting of the EPSRC Network on Vision and Language.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We present results of an on-line data collection experiment where we investigate the assignment and coordination of spatial perspective between a pair of dialogue participants situated in a constrained virtual environment.
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| 4. |
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| 5. |
- Höglund, Lars, 1946, et al.
(författare)
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Maskininlärningsbaserad indexering av digitaliserade museiartefakter - projektrapport
- 2012
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Projektet har genomfört försök med maskinbaserad analys och maskininlärning för automatisk indexering och analys av bilder som stöd för registrering av föremål i museibestånd. Resultaten visar att detta är möjligt för avgränsade delmängder i kombination med maskininlärning som stöd för, men inte som ersättning för, manuell analys. Projektet har också funnit behov av utveckling av ett användargränssnitt för både text och bildsökning och utvecklat en prototyplösning för detta, vilket finns dokumenterat i denna rapport och i ett separat appendix till rapporten. Materialet utgör grundunderlag för implementeringar som innebär utökade sökmöjligheter, effektivare registrering samt ett användarvänligt gränssnitt. Arbetet ligger i framkant av forskningsområdets resultat och etablerade metoder och kombinerar statististiska, lingvistiska och datavetenskapliga metoder. Se länk till rapport och även länk till appendix längre ned.
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| 6. |
- Hamon, Thierry, et al.
(författare)
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Combining Compositionality and Pagerank for the Identification of Semantic Relations between Biomedical Words
- 2012
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Ingår i: BioNLP. - 9781937284206 - 1937284204 ; , s. 109-117
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Konferensbidrag (refereegranskat)abstract
- The acquisition of semantic resources and relations is an important task for several applications, such as query expansion, information retrieval and extraction, machine translation. However, their validity should also be computed and indicated, especially for automatic systems and applications. We exploit the compositionality based methods for the acquisition of synonymy relations and of indicators of these synonyms. We then apply pagerank-derived algorithm to the obtained semantic graph in order to filter out the acquired synonyms. Evaluation performed with two independent experts indicates that the quality of synonyms is systematically improved by 10 to 15% after their filtering.
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| 7. |
- Toll, Daniel, et al.
(författare)
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The challenge of teaching students the value of programming best practices
- 2014
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Ingår i: ITICSE 2014 - Proceedings of the 2014 Innovation and Technology in Computer Science Education Conference. - New York, New York, USA : Association for Computing Machinery (ACM). - 9781450328333
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Konferensbidrag (refereegranskat)abstract
- We investigate the benefits of our programming assignments in correlation to what the students learn and show in their programming solutions. The assignments are supposed to teach the students to use best practices related to program comprehension, but do the programming assignments clearly show the benefits of best practices? We performed an experiment that showed no significant result which suggests that the assignments did not emphasise the value of best practices. As lecturers, we understand that constructing assignments that match the sought after outcome in students learning is a complex task. The experiment provided valuable insights that we will use to improve the assignments to better mirror best practices.
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| 8. |
- Wilhelmsson, Kenneth
(författare)
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Automatic Question Generation from Swedish Documents as a Tool for Information Extraction
- 2011
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Ingår i: Proceedings of the 18th Nordic Conference of Computational Linguistics NODALIDA 2011. ; , s. 323-326
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Konferensbidrag (refereegranskat)abstract
- An implementation of automatic question generation (QG) from raw Swedish text is presented. QG is here chosen as an alternative to natural query systems where any query can be posed and no indication is given of whether the current text database includes the information sought for. The program builds on parsing with grammatical functions from which corresponding questions are generated and it incorporates the article database of Swedish Wikipedia. The pilot system is meant to work with a text shown in the GUI and auto-completes user input to help find available questions. The act of question generation is here described together with early test results regarding the current produced questions.
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| 9. |
- Dravins, Christina, et al.
(författare)
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Exploring and enjoying non-speech sounds through a cochlear implant: the therapy of music
- 2010
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Ingår i: 11th International Conference on Cochlear Implants and other Implantable Technologies. - Karolinska University Hospital : Karolinska University Hospital. ; , s. 356-
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Konferensbidrag (refereegranskat)abstract
- Cochlear implant technology was initially designed to promote reception ofspeech sounds; however, music enjoyment remains a challenge. Music is aninfluential ingredient in our well-being, playing an important role in ourcognitive, physical and social development. For many cochlear implantrecipients it is not feasible to communicate how sounds are perceived, andconsequently the benefits of music listening may be reduced. Non-speechsounds may also be important to persons with multiple functional deficitsthat relay on information additional to verbatim for participating incommunication. Deaf-born children with multiple functional deficitsconstitute a special vulnerable group as lack of reaction to sound oftenis discouraging to caregivers. Individually adapted tools and methods forsound awareness may promote exploration and appreciation of theinformation mediated by the implant.Two current works involving habilitation through sound production andmusic will be discussed. First, the results from a pilot study aiming atfinding musical toys that can be adapted to help children explore theirhearing with engaging sounds and expressive interfaces will be presented.The findings indicate that children with multiple functional deficits canbe more inclined to use the auditory channel for communication and playthan the caregivers would anticipate.Second, the results of a recent questionnaire study, which compared themusic exposure and appreciation of preschool cochlear implant recipientswith their normally hearing peers will be presented. The data from thisstudy indicate that preschool children with cochlear implants spendroughly the same amount of time interacting with musical instruments athome and watching television programmes and DVDs which include music.However, the data indicate that these children receive less exposure torecorded music without visual stimuli and show less sophisticatedresponses to music. The provision and supported use of habilitationmaterials which encourage interaction with music might therefore bebeneficial.
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| 10. |
- Hansen, Kjetil Falkenberg, 1972-, et al.
(författare)
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Sonification of distance between stations in train journeys
- 2012
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Ingår i: TMH-QPSR special issue: Proceedings of SMC Sweden 2012 Sound and Music Computing, Understanding and Practicing in Sweden. - Stockholm : Department of Speech, Music and Hearing, Royal Institute of Technology. - 1104-5787. ; 52:1, s. 13-14, s. 13-14
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Tidskriftsartikel (refereegranskat)
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