Dissertations / Theses on the topic 'Optic flow'
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Cheng, Chuen-kei Joseph, and 鄭傳基. "Path perception from optic flow." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B4961759X.
Full textpublished_or_final_version
Psychology
Doctoral
Doctor of Philosophy
Frenz, Harald. "Distance perception derived from optic flow." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=970154836.
Full textBowns, Linda. "Three dimensional structure from optic flow." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315035.
Full textHerlihey, Tracey A. "Optic flow, egocentric direction and walking." Thesis, Cardiff University, 2010. http://orca.cf.ac.uk/54390/.
Full textPersiani, Michela <1984>. "Influence of optic flow on postural control." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7009/1/Persiani_Michela_tesi.pdf.
Full textPersiani, Michela <1984>. "Influence of optic flow on postural control." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7009/.
Full textPannell, C. N. "Fibre-optic laser Doppler velocimetry." Thesis, University of Kent, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383370.
Full textLee, Jongsoo. "Facet model optic flow and rigid body motion." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/53885.
Full textPh. D.
Fraedrich, Eva. "The effects of spatially relevant and irrelevant optic flow." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-145894.
Full textWertz, Adrian. "Optic flow processing in premotor descending neurons of the fly." Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-99215.
Full textZikovitz, Daniel C. "Self-motion perception through visual optic flow and vestibular cues." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ39249.pdf.
Full textDale, Jason Lee. "A real time implementation of a neuromorphic optic flow algorithm." Thesis, University College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400469.
Full textStephens, Timothy John. "Fibre-optic delivery of high peak power laser pulses for flow measurement." Thesis, Heriot-Watt University, 2003. http://hdl.handle.net/10399/296.
Full textPatel, Hitesh C. "Non-linear 3D modelling of heat flow in magneto-optic multilayered media." Thesis, Keele University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358555.
Full textKennedy, Joseph D. "Influence of Imposed Optic Flow on Basketball Shooting Performance and Postural Sway." Miami University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1438106132.
Full textWang, Wei-Chih. "A study of fluid viscosity and flow measurement using fiber-optic transducers /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/5908.
Full textArvai, Amanda. "Vision-based navigation using multi-rate feedback from optic flow and scene reconstruction." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0013261.
Full textHernandez, Guillermina Claudia Martinez. "Investigation into the use of optic flow and CMAC network for robot balancing." Thesis, University of Reading, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424115.
Full textUesaki, Maiko. "Brain Mechanisms Underlying Integration of Optic Flow and Vestibular Cues to Self-motion." Kyoto University, 2018. http://hdl.handle.net/2433/232163.
Full text0048
新制・課程博士
博士(文学)
甲第20828号
文博第758号
新制||文||655(附属図書館)
京都大学大学院文学研究科行動文化学専攻
(主査)教授 蘆田 宏, 教授 板倉 昭二, 教授 Anderson James Russell, 准教授 ALTMANN Christian
学位規則第4条第1項該当
Webb, Ian Andrew. "An extension to optic flow analysis for the generation of computer animated images." Master's thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/12526.
Full textThis dissertation seeks to develop image based animation methods using the technique of optic flow analysis developed for a moving planar object. Image based rendering is presented as a class of algorithm using two dimensional shortcuts to the problem of three dimensional animation. The optic flow field is used to develop an image based algorithm based on its use as a description of the diffences between consecutive frames of an animation. A Taylor analysis of the optic flow field is the underlying tool used, breaking the field up into a hierarchy of terms. For a moving planar object, we have considerably simplified the second order Taylor terms into a basis of just two independent terms, which can be related closely to a perspective transformation between frames. Perspective transformations capture exactly the optic flow of a moving planar object. Using the simplified decomposition of the flow field for a moving plane, we decompose the frame to frame transformation into a hierarchy of terms of increasing accuracy and cost. Depending on their accuracy we may choose any of these as transformation on an image between frames, instead of rerendering. The errors in the approximation can be tracked via the Taylor series. This dissertation develops the theory and presents an animation algorithm based on optic flow, and then presents the results of various tests of the algorithm in a variety of simple scenes. The results demonstrate the effectiveness of the algorithm and the time saving achieved in animation.
Harju, Mika. "Exfoliation glaucoma : studies on intraocular pressure, optic nerve head morphometry, and ocular blood flow." Helsinki : University of Helsinki, 2001. http://ethesis.helsinki.fi/julkaisut/laa/kliin/vk/harju/.
Full textSANGANZA, WILSON KARE. "THE FIBER-OPTIC BASED UV-VISIBLE DETECTOR FOR CONTINUOUS FREE FLOW ELECTROPHORESIS, UTILIZING FOCUSING ELEMENTS." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1134504515.
Full textTripp, Lisa Marie. "The induction of the optic flow motion aftereffect in the central versus peripheral visual field." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Fall2009/l_tripp_091009.pdf.
Full textTitle from PDF title page (viewed on Jan. 20, 2010). "Department of Psychology." Includes bibliographical references (p. 24-28).
Hopp, Elisabeth Verfasser], and Alexander [Akademischer Betreuer] [Borst. "Subcellular mapping of dendritic activity in optic flow processing neurons / Elisabeth Hopp. Betreuer: Alexander Borst." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1080122222/34.
Full textWeber, Franz. "System identification of optic-flow processing neurons in the fly: single cell and small circuit models." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-139155.
Full textBusch, Christian [Verfasser], and Alexander [Akademischer Betreuer] Borst. "Control of walking behavior by horizontal optic flow detectors in Drosophila / Christian Busch ; Betreuer: Alexander Borst." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2020. http://d-nb.info/1216039380/34.
Full textWilkie, Richard M. "Vision and steering." Thesis, University of Reading, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369203.
Full textDyhr, Jonathan Peter. "Behavioral and Theoretical Evidence that Non-directional Motion Detectors Underlie the Visual Estimation of Speed in Insects." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195704.
Full textRedlick, Fara P. "The roles of optic flow and proprioception in the perception of active and passive linear self-motion." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq43401.pdf.
Full textSiu, Wai-fung, and 蕭蔚鋒. "Can optic flow recalibrate the perceived straight ahead in the visual control of steering toward a goal?" Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/196496.
Full textpublished_or_final_version
Psychology
Master
Master of Philosophy
Fraedrich, Eva [Verfasser], and Stefan [Akademischer Betreuer] Glasauer. "The effects of spatially relevant and irrelevant optic flow : an investigation with fMRI / Eva Fraedrich. Betreuer: Stefan Glasauer." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1025046986/34.
Full textHelde, Kristian. "Exploring a Visual Flow Display to Enhance Spatial Orientation during Flight." Thesis, University of Skövde, Department of Computer Science, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-689.
Full textThe problem of spatial disorientation during flight of aircraft is briefly described, as are definitions of the phenomenon. Traditional countermeasure efforts that are often directed towards changes in the central visual field are reconsidered in favour of presentation of information in the peripheral visual field. It is proposed to use optic flow to support spatial orientation, as well as to omit such information from the central visual field. An experiment was conducted, and results showed that forward visual flow gave very important spatial information. The flow could be cropped to a certain degree in the periphery (horizontally), as well as parts of the central presentation could be omitted without decreasing effects in the experiment. Implications relevant to possible implementations in aircraft are discussed.
Hikosaka, Tomoyuki, Yasunori Hatta, Hidenobu Koide, Akina Yamazaki, Fumihiro Endo, Hitoshi Okubo, Tsutomu Nara, and Katsumi Kato. "Space Charge Behavior in Palm Oil Fatty Acid Ester (PFAE) by Electro-optic Field Measurement." IEEE, 2009. http://hdl.handle.net/2237/14538.
Full textGarratt, Matthew Adam, and m. garratt@adfa edu au. "Biologically Inspired Vision and Control for an Autonomous Flying Vehicle." The Australian National University. Research School of Biological Sciences, 2008. http://thesis.anu.edu.au./public/adt-ANU20090116.154822.
Full textParks, Matthew Raymond. "Vision-Based Self-Motion Estimation in a Fixed-Wing Aerial Vehicle." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/33855.
Full textThis paper describes a complete algorithm to estimate the motion of a fixed-wing aircraft given a series of digitized flight images. The algorithm was designed for fixed-wing aircraft because carefully procured flight images and corresponding navigation data were available to us for testing. After image pre-processing, optic flow data is determined by automatically finding and tracking good features between pairs of images. The image coordinates of matched features are then processed by a rigid-object linear optic flow-motion estimation algorithm. Input factors are weighed to provide good testing techniques. Error analysis is performed with simulation data keeping these factors in mind to determine the effectiveness of the optic flow algorithm. The output of this program is an estimate of rotation and translation of the imaged environment in relation to the camera, and thereby the airplane. Real flight images from NASA test flights are used to confirm the accuracy of the algorithm. Where possible, the estimated motion parameters are compared with recorded flight instrument data to confirm the correctness of the algorithm. Results show that the algorithm is accurate to within a degree provided that enough optic flow feature points are tracked.
Master of Science
Kramer, Anna [Verfasser], and Herwig [Akademischer Betreuer] Baier. "Optic-flow processing in the pretectum of larval zebrafish as revealed by the FuGIMA method / Anna Kramer ; Betreuer: Herwig Baier." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2019. http://d-nb.info/1200354060/34.
Full textWeber, Franz [Verfasser], and Alexander [Akademischer Betreuer] Borst. "System identification of optic-flow processing neurons in the fly : single cell and small circuit models / Franz Weber. Betreuer: Alexander Borst." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/101947923X/34.
Full textMancuso, Giovanni. "Integration of Head-Centric Optic Flow and Head Rotation signals account for the perception of surface tilt by the active observer." Doctoral thesis, Università degli studi di Trento, 2013. https://hdl.handle.net/11572/368117.
Full textMancuso, Giovanni. "Integration of Head-Centric Optic Flow and Head Rotation signals account for the perception of surface tilt by the active observer." Doctoral thesis, University of Trento, 2013. http://eprints-phd.biblio.unitn.it/1095/1/thesis.pdf.
Full textEriksson, Lars. "Visual Flow Display for Pilot Spatial Orientation." Doctoral thesis, Uppsala universitet, Institutionen för psykologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-111273.
Full textElder, John Price. "The Sensory Basis of Rheotaxis in Turbulent Flow." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1402238282.
Full textMenuchi, Marcos Rodrigo Trindade Pinheiro. "Locomoção visualmente guiada na transposição de obstáculos : efeitos de amostras visuais estáticas e dinâmica /." Rio Claro : [s.n.], 2005. http://hdl.handle.net/11449/87418.
Full textBanca: José Angelo Barela
Banca: Sérgio Teixeira Fonseca
Resumo: Durante a locomoção, ocorre um padrão de movimento visual referido como um campo de fluxo óptico. Para explorar como os ajustamentos locomotores são influenciados por este padrão, um paradigma experimental foi desenvolvido para anular o fluxo óptico durante a locomoção e ultrapassagem de obstáculo. O objetivo deste estudo foi investigar a contribuição de amostragens visuais estáticas e dinâmica na locomoção e ultrapassagem de obstáculos de diferentes alturas. Dez indivíduos (23,4 l 1,28 anos de idade, de ambos os gêneros) foram convidados a andar sobre uma passarela e ultrapassar um de dois obstáculos personalizados (obstáculo alto = altura do joelho e obstáculo baixo = altura do tornozelo) posicionado a 5m do ponto de partida. Diodos emissores de luz foram afixados no 5º metatarso e face lateral do calcâneo em ambos os pés e suas trajetórias foram filmados por quatro filmadoras digitais posicionadas bilateralmente à passarela. Dois blocos de tentativas foram apresentados em função das condições de amostragens visuais. No primeiro bloco, 10 tentativas com amostragem visual dinâmica (iluminação normal) foram apresentadas. No segundo bloco de tentativas, duas condições de amostragens visuais estáticas foram apresentadas de forma aleatória por meio de uma luz estroboscópica (2 flashes/segundo e 4 flashes/segundo). A duração de cada flash não ultrapassou 16ms e forneceu apenas imagens estáticas do ambiente. A altura do obstáculo foi randomizada em cada bloco de tentativas. Cinco tentativas para cada condição foram coletadas, totalizando 30 tentativas por participante. Todas as imagens foram digitalizadas e reconstruídas no plano tri-dimensional. As variáveis dependentes na fase de aproximação (comprimentos dos dois passos anteriores à ultrapassagem) e na fase de ultrapassagem... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: During locomotion, a pattern of visual motion referred as an optic flow field occurs. In order to explore how the locomotor adjustments are influenced by this pattern, an experimental paradigm was developed to remove the optic flow during locomotion and obstacle avoidance. The aim of this study was to investigate the contribution of the static and dynamic visual sampling on the locomotion and obstacle avoidance of different heights. Ten individuals (23.4 l 1.28 years of age, both genders) were invited to walk on a pathway and to avoid one out of two personalized obstacles (high obstacle = knee height and low obstacle = ankle height) positioned 5m from the starting position. Light emitting diodes were fixed on the fifth metatarsal and calcaneus lateral face in both feet and their trajectories were recorded by four digital cameras bilaterally positioned related to the pathway. Two trial blocks were presented depending of the visual sampling conditions. In the first block, 10 trials with visual dynamic sampling (normal light) were presented. In the second trial block, two conditions of the static visual sampling frequencies were presented in an randomized way by means of the stroboscopic light (2 flashes/second or 4 flashes/second). Each flash duration was about 16ms and provided only environmental static images. Obstacle height was randomized for each trial block. Five trials for each experimental condition were collected totalizing 30 trials for each participant. All images were digitalized and reconstructed in the 3D plane. Dependent variables in the approach phase (last two step lengths before crossing) and in the crossing phase (horizontal toe distance to the obstacle prior crossing, obstacle toe clearance and mean horizontal velocity for each foot) were selected. The results revealed differences... (Complete abstract, access undermentioned electronic address)
Mestre
Niehus, Mark T. "An Experimental Study of Temperature Sensor Noise Analysis in Evaluating the Velocity of Single-Phase Air and Water Flows." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1213385038.
Full textRutkowski, Adam J. "A BIOLOGICALLY-INSPIRED SENSOR FUSION APPROACH TO TRACKING A WIND-BORNE ODOR IN THREE DIMENSIONS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1196447143.
Full textJohnson, Neil G. "Vision-Assisted Control of a Hovering Air Vehicle in an Indoor Setting." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2430.pdf.
Full textPretto, Paolo. "The perception and production of speed during self-motion: evidence for non-optimal compensation mechanisms." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425122.
Full textOtten, Edward W. "The Influence of Stimulus Complexity and Perception-action Coupling on Postural Sway." Miami University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=miami1218562177.
Full textVanhoutte, Erik. "Microdrone équipé d'un système visuel inspiré des abeilles." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0431/document.
Full textThe interest in autonomous robotics is continually expanding, especially in the domain of micro air vehicles. Indeed, much research focuses on these small-size aircraft in order to miniaturize them and to make their navigation more autonomous. This PhD thesis explores a parsimonious vision system dedicated to short range navigation using innovative self-adaptive visual sensors composed of only 12 pixels with optical properties inspired by those of honeybees. Two optic flow measurement algorithms are first compared under ideal conditions over 5 decades of irradiance and 3 decades of optical velocity, then tested under real flight conditions. The most robust and efficient algorithm, due to its very low computing requirements, was embedded on board a micro quadrotor weighing about 400 g and equipped with a parsimonious visual system of 96 pixels stabilized via an articulated gimbal in roll and pitch to compensate the quadrotor rotations. The navigation strategies observed in honeybees were simulated in virtual environments (6 m or 12 m long tunnel for a minimum section of 25 or 50 cm) and the feasibility of the detection of the optic flow on board a micro quadrotor was demonstrated in real flight conditions in experimental room (flight of 4 m long at a minimum distance of 50 cm). Coupled with navigation strategies inspired by the honeybee, this innovative visual system dedicated to the perception of movement will in the near future allow to navigate in cluttered or cramped environments
Menuchi, Marcos Rodrigo Trindade Pinheiro [UNESP]. "Locomoção visualmente guiada na transposição de obstáculos: efeitos de amostras visuais estáticas e dinâmica." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/87418.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Durante a locomoção, ocorre um padrão de movimento visual referido como um campo de fluxo óptico. Para explorar como os ajustamentos locomotores são influenciados por este padrão, um paradigma experimental foi desenvolvido para anular o fluxo óptico durante a locomoção e ultrapassagem de obstáculo. O objetivo deste estudo foi investigar a contribuição de amostragens visuais estáticas e dinâmica na locomoção e ultrapassagem de obstáculos de diferentes alturas. Dez indivíduos (23,4 l 1,28 anos de idade, de ambos os gêneros) foram convidados a andar sobre uma passarela e ultrapassar um de dois obstáculos personalizados (obstáculo alto = altura do joelho e obstáculo baixo = altura do tornozelo) posicionado a 5m do ponto de partida. Diodos emissores de luz foram afixados no 5º metatarso e face lateral do calcâneo em ambos os pés e suas trajetórias foram filmados por quatro filmadoras digitais posicionadas bilateralmente à passarela. Dois blocos de tentativas foram apresentados em função das condições de amostragens visuais. No primeiro bloco, 10 tentativas com amostragem visual dinâmica (iluminação normal) foram apresentadas. No segundo bloco de tentativas, duas condições de amostragens visuais estáticas foram apresentadas de forma aleatória por meio de uma luz estroboscópica (2 flashes/segundo e 4 flashes/segundo). A duração de cada flash não ultrapassou 16ms e forneceu apenas imagens estáticas do ambiente. A altura do obstáculo foi randomizada em cada bloco de tentativas. Cinco tentativas para cada condição foram coletadas, totalizando 30 tentativas por participante. Todas as imagens foram digitalizadas e reconstruídas no plano tri-dimensional. As variáveis dependentes na fase de aproximação (comprimentos dos dois passos anteriores à ultrapassagem) e na fase de ultrapassagem...
During locomotion, a pattern of visual motion referred as an optic flow field occurs. In order to explore how the locomotor adjustments are influenced by this pattern, an experimental paradigm was developed to remove the optic flow during locomotion and obstacle avoidance. The aim of this study was to investigate the contribution of the static and dynamic visual sampling on the locomotion and obstacle avoidance of different heights. Ten individuals (23.4 l 1.28 years of age, both genders) were invited to walk on a pathway and to avoid one out of two personalized obstacles (high obstacle = knee height and low obstacle = ankle height) positioned 5m from the starting position. Light emitting diodes were fixed on the fifth metatarsal and calcaneus lateral face in both feet and their trajectories were recorded by four digital cameras bilaterally positioned related to the pathway. Two trial blocks were presented depending of the visual sampling conditions. In the first block, 10 trials with visual dynamic sampling (normal light) were presented. In the second trial block, two conditions of the static visual sampling frequencies were presented in an randomized way by means of the stroboscopic light (2 flashes/second or 4 flashes/second). Each flash duration was about 16ms and provided only environmental static images. Obstacle height was randomized for each trial block. Five trials for each experimental condition were collected totalizing 30 trials for each participant. All images were digitalized and reconstructed in the 3D plane. Dependent variables in the approach phase (last two step lengths before crossing) and in the crossing phase (horizontal toe distance to the obstacle prior crossing, obstacle toe clearance and mean horizontal velocity for each foot) were selected. The results revealed differences... (Complete abstract, access undermentioned electronic address)
Expert, Fabien. "Un robot volant inspiré des insectes : De la mesure du flux optique aux stratégies de guidage visuel pour un micro hélicoptère." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4116/document.
Full textIn this thesis, we first developed and characterized optic flow sensors robust to illuminance changes inspired by the visual system of the fly and computing the angular speed thanks to the "time of travel" scheme. In particular, we have compared the performances of sensors processing the visual angular speed based on a standard retina or an aVLSI retina composed of pixels automatically adapting to the background illuminance in indoor and outdoor environments. The results of such bio-inspired sensors have also been compared with optic mouse sensors which are used nowadays on Micro Aerial Vehicles to process the optic flow but only in outdoor environments. Finally, a new implementation of the "time of travel" scheme has been proposed reducing the computational load of the processing unit.In the framework of the European project CurvACE, we also participated to the design and development of the first curved artificial compound eye including fast motion detection in a very large range of illuminations. In particular, we characterized such sensor showing its ability to extract optic flow using different algorithms.Finally, we also developed a tethered miniature aerial robot equipped with sensors and control strategies mimicking flying insects navigating in a high-roof tunnel. This robot may explain how honeybees control their speed and position thanks to optic flow, while demonstrating alternative solution to classical robotic approach relying on ground-truth and metric sensors. Based only on visuomotor control loops reacting suitably to the environment, this rotorcraft has shown its ability to fly autonomously in complex and unstationary tunnels