It is well understood that multiple video cameras and computer vision (CV) technology can be used in sport for match officiating, statistics and player performance analysis. A review of the literature reveals a number of existing solutions, both commercial and theoretical, within this domain. However, these solutions are expensive and often complex in their installation. The hypothesis for this research states that by considering only changes in ball motion, automatic event classification is achievable with low-cost monocular video recording devices, without the need for 3-dimensional (3D) positional ball data and representation. The focus of this research is a rigorous empirical study of low cost single consumer-grade video camera solutions applied to table tennis, confirming that monocular CV based detected ball location data contains sufficient information to enable key match-play events to be recognised and measured. In total a library of 276 event-based video sequences, using a range of recording hardware, were produced for this research. The research has four key considerations: i) an investigation into an effective recording environment with minimum configuration and calibration, ii) the selection and optimisation of a CV algorithm to detect the ball from the resulting single source video data, iii) validation of the accuracy of the 2-dimensional (2D) CV data for motion change detection, and iv) the data requirements and processing techniques necessary to automatically detect changes in ball motion and match those to match-play events. Throughout the thesis, table tennis has been chosen as the example sport for observational and experimental analysis since it offers a number of specific CV challenges due to the relatively high ball speed (in excess of 100kph) and small ball size (40mm in diameter). Furthermore, the inherent rules of table tennis show potential for a monocular based event classification vision system. As the initial stage, a proposed optimum location and configuration of the single camera is defined. Next, the selection of a CV algorithm is critical in obtaining usable ball motion data. It is shown in this research that segmentation processes vary in their ball detection capabilities and location out-puts, which ultimately affects the ability of automated event detection and decision making solutions. Therefore, a comparison of CV algorithms is necessary to establish confidence in the accuracy of the derived location of the ball. As part of the research, a CV software environment has been developed to allow robust, repeatable and direct comparisons between different CV algorithms. An event based method of evaluating the success of a CV algorithm is proposed. Comparison of CV algorithms is made against the novel Efficacy Metric Set (EMS), producing a measurable Relative Efficacy Index (REI). Within the context of this low cost, single camera ball trajectory and event investigation, experimental results provided show that the Horn-Schunck Optical Flow algorithm, with a REI of 163.5 is the most successful method when compared to a discrete selection of CV detection and extraction techniques gathered from the literature review. Furthermore, evidence based data from the REI also suggests switching to the Canny edge detector (a REI of 186.4) for segmentation of the ball when in close proximity to the net. In addition to and in support of the data generated from the CV software environment, a novel method is presented for producing simultaneous data from 3D marker based recordings, reduced to 2D and compared directly to the CV output to establish comparative time-resolved data for the ball location. It is proposed here that a continuous scale factor, based on the known dimensions of the ball, is incorporated at every frame. Using this method, comparison results show a mean accuracy of 3.01mm when applied to a selection of nineteen video sequences and events. This tolerance is within 10% of the diameter of the ball and accountable by the limits of image resolution. Further experimental results demonstrate the ability to identify a number of match-play events from a monocular image sequence using a combination of the suggested optimum algorithm and ball motion analysis methods. The results show a promising application of 2D based CV processing to match-play event classification with an overall success rate of 95.9%. The majority of failures occur when the ball, during returns and services, is partially occluded by either the player or racket, due to the inherent problem of using a monocular recording device. Finally, the thesis proposes further research and extensions for developing and implementing monocular based CV processing of motion based event analysis and classification in a wider range of applications.

Im Rahmen zweier Studien im Leistungssport werden die Effekte bewusster und unbewusster Faktoren auf implizite und explizite Motive untersucht. Es kann die Distinktheit der Vorhersagebereiche impliziter und expliziter Motivdiagnostik repliziert werden. Dabei wird aufgezeigt, dass die handlungsführenden Effekte impliziter und expliziter Motive jeweils exklusiv durch unbewusste Impulskontrolle und bewusste Selbststeuerungskompetenzen moderiert werden. Allein implizite Prozesse (implizite Motive, Impulskontrolle) besitzen prognostischen Wert für sportliches Leisten in Situationen die unbewusst verarbeitet werden. Explizite Prozesse (explizite Motive, bewusste Selbststeuerung) hingegen sagen sportliches Leisten in bewusst verarbeiteten Situationen des sportlichen Wettkampfs vorher. Die differentielle Prognostizität direkter und indirekter Motivdiagnostik in der Sportpsychologie kann durch die Berücksichtigung adäquater Faktoren verbessert werden. Aufgrund der Ergebnisse dieser Arbeit ist bei der Auswahl adäquater Persönlichkeitsvariablen darauf zu achten, dass das zu prognostizierende Kriterium und die Erhebungsmethodik bezüglich ihres Grades an bewusster Bearbeitung miteinander übereinstimmen. / The effects of conscious and unconscious factors on implicit and explicit motives were examined in the context of two studies. The distinct array of prediction by implicit and explicit motive diagnostic can be replicated. Though it was possible to provide evidence for the exclusive moderation of implicit motives by unconscious activity inhibition while explicit motives were moderated by conscious skills of self-regulation. Only the implicit processes (implicit motives and activity inhibition) proof a value to predicting human activity in situations coped without consciousness. In contrast only explicit processes (explicit motives and conscious skills of self-regulation) can predict the outcome of behaviour in situations coped with consciousness. The results of that paper can improve the differential prediction of direct and indirect motive diagnostic by regarding the adequate moderator factors. Further investigations will have the ability to improve the value of motivational predictors if they consider, that the level of consciousness is consistent within the situation of ascertainment the motivational predictor and the situation the criteria is imposed.

Introduktion: Många människor i Sverige är medlemmar i idrottsföreningar och håller sig fysiskt aktiva genom att idrotta, i detta fall handlar studien om idrotten bordtennis. Många av idrottsföreningarna och idrottsorganisationerna använder sig av Facebook för att engagera sina medlemmar men frågan är om bordtennisspelares användning av bordtennispecifika Facebooksidor och grupper kan påverka deras motivation till att spela bordtennis? Syfte: Att undersöka om det fanns samband mellan att använda bordtennisrelaterade Facebooksidor/grupper och motivation till att idrotta. Metod: En kvantitativ enkätundersökning där programmet SPSS har använts som analysverktyg. Analysen har gjorts genom att jämföra medianer av allmän motivation och olika motivationstyper (inneboende integrerad, identifierad, introjicerad, extern och amotivation) i förhållande till frekvens att använda bordtennisrelaterade Facebooksidor och grupper (BFSG). Även korrelationsanalys har gjorts med de variablerna. Resultat: Resultatet visar att det inte finns något samband mellan allmän motivation och användning av BFSG. Däremot finns ett samband mellan att läsa på BFSG och integrerad motivation samt amotivation. Inget samband fanns mellan att skriva på BFSG och olika motivationstyper. Slutsats: Att använda Facebook och specifikt läsa på BFSG kan till viss del öka motivationen för att idrotta hos licensierade bordtennisspelare i Sverige. Detta kan vara bra för idrottsorganisationer och klubbar att dra nytta av genom att vara aktiva på Facebook och dela information och andra medier för att öka motivationen hos sina medlemmar. / Introduction: Many people in Sweden are members of sports associations and stay physically active by playing sports, this study is about table tennis. Many sport associations and organizations use Facebook to engage their members, but the question is if the use of table tennis-related Facebook pages and groups affects their motivation to play table tennis. Aim: To investigate whether there was a connection between using table tennis-related Facebook pages /groups and motivation to play. Method: A quantitative survey where SPSS was used for the statistical analysis. The analysis has been achieved by comparing medians of general motivation and different types of motivation (intrinsic, integrated, identified, introjected, external and amotivation) in relation to the frequency of using table tennis-related Facebook pages and groups (BFSG). Correlation analysis has also been performed with these variables. Results: The results show that there is no connecion between general motivation and the use of BFSG. However, there is a connection between reading in BFSG and integrated motivation and amotivation. There was no connection between writing on BFSG and different types of motivation. Conclusion: Using Facebook and specifically reading BFSG can increase the motivation to play among licensed table tennis players in Sweden. This can be good for sports organizations and clubs to take advantage of, i.e. by being active on Facebook and sharing information and other media can increase the motivation of the members.

Duale Prozessmodelle unterscheiden implizite und explizite Formen der Informations-verarbeitung (Strack & Deutsch, 2004). Implizite Verarbeitung erfolgt schnell und un-bewusst und basiert auf affektiv-assoziativen Netzwerken. Explizite Verarbeitung geschieht überlegt und langsam und beinhaltet bewusste, kognitive Entscheidungsprozesse. In dualen Prozessmodellen der Motivation sagen implizite Motive langfristiges Verhalten und explizite Motive bewusste Entscheidungen vorher (McClelland, et al., 1989). Hoher positiver Affekt sowie geringer negativer Affekt aktivieren implizite kognitive Systeme während eine entgegen gesetzte Ausprägung explizite Informationsverarbeitung bahnt (J. Kuhl, 2000a). Drei Feldstudien untersuchen die diskriminante Validität impliziter vs. expliziter motivationaler Prozesse für das Verhalten in unbewussten vs. bewussten kritischen Situatio-nen im Hochleistungssport. In Studie 1 und 2 wird bei Tennis- (N = 60) und Basketballspielern (N = 56) die Fähigkeit erhoben, positiven und negativen Affekt zu regulieren (ACS-90; J. Kuhl, 1994). In Studie 3 (N = 86) werden zusätzlich implizite (OMT; J. Kuhl & Scheffer, 1999) und explizite Motive (PRF; D. N. Jackson, 1999) sowie die Fähigkeit zur bewussten Selbstregulation (VCQ; J. Kuhl & Fuhrmann, 1998) gemessen. In Studie 1 sagen explizite Formen der Verarbeitung (niedrige positive Affektregulation) die Tennisleistung in objektiv kritischen (wie Tie Breaks) aber nicht in bewusst kritischen Situationen vorher. In Studie 2 führt implizite Verarbeitung (hohe negative Af-fektregulation) zu besseren Basketballleistungen in objektiv kritischen Spielen. In Studie 3 unterstützt explizite Verarbeitung Leistungen in bewusst kritischen Situationen im Rückschlagsport. In unbewusst kritischen Situationen erzielen dagegen Sportler mit ausgeprägten impliziten Motiven bessere Ergebnisse. Die Befunde werden hinsichtlich der Sportartenspezifik, dem Grad der Bewusstheit sowie Persönlichkeitsunterschiede diskutiert. / Dual-process models distinguish implicit and explicit ways of information processing (Strack & Deutsch, 2004). Implicit processes are based on associative affective networks and operate fast and unconsciously. Explicit processing is a cognitive, usually slow, deliberate, and conscious way of decision-making. Dual-process models of motivation propose that implicit motives predict long-term behavior and explicit motives predict deliberate decisions (McClelland, Koestner, & Weinberger, 1989). Up-regulation of positive affect and down-regulation of negative affect activate implicit cognitive systems while regulation in the opposite direction triggers explicit information processing (J. Kuhl, 2000a). Within three field studies it is investigated whether implicit vs. explicit motivational processes are of discriminant validity for professional athletic behavior in unconsciously vs. consciously critical situations. In study one and two, tennis (N = 60) and basketball professionals’ (N = 56) abilities to regulate positive and negative affect (ACS-90; J. Kuhl, 1994) are assessed. In study three (N = 86) the additional measures of implicit (OMT; J. Kuhl & Scheffer, 1999) and explicit motives (PRF; D. N. Jackson, 1999) as well as conscious self-regulation (VCQ; J. Kuhl & Fuhrmann, 1998) are used. Study one proposes that explicit processing supports performance in objective critical situations (tie breaks) in tennis. However, in consciously critical situations no advantage for explicitly processing athletes could be found. In study two implicitly processing basketball players perform better in objectively critical games. In the final study racquet sportsmen who process explicitly perform better in consciously critical situations. In contrast, in unconsciously critical situations athletes with high implicit motives gain better results. Findings are discussed from the perspective of task specificity, degree of awareness, and individual differences.

The dissertation is composed on theme OF THE SPORTS CENTRE KRUMLOV. In this three-storey building, there is the squash hall, table tennis, fitness hall, sauna for 6 persons and a café. In the garden that belongs to the building, there is projected a course for minigolf, playground for pétanque and tennis court. Constructional system is projected from lime-sand bricks, concrete beam ceilings and glued wooden beams. The roof is flat. External surface finish of the building is the ventilated facade.