An extension to optic flow analysis for the generation of computer animated images

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dc.contributor.advisorBlake, Edwin Hen_ZA
dc.contributor.authorWebb, Ian Andrewen_ZA
dc.date.accessioned2015-02-17T13:06:56Z
dc.date.available2015-02-17T13:06:56Z
dc.date.issued1998en_ZA
dc.descriptionBibliography: leaves 148-151.en_ZA
dc.description.abstractThis 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.en_ZA
dc.identifier.apacitationWebb, I. A. (1998). <i>An extension to optic flow analysis for the generation of computer animated images</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Computer Science. Retrieved from http://hdl.handle.net/11427/12526en_ZA
dc.identifier.chicagocitationWebb, Ian Andrew. <i>"An extension to optic flow analysis for the generation of computer animated images."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Computer Science, 1998. http://hdl.handle.net/11427/12526en_ZA
dc.identifier.citationWebb, I. 1998. An extension to optic flow analysis for the generation of computer animated images. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Webb, Ian Andrew AB - This 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. DA - 1998 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1998 T1 - An extension to optic flow analysis for the generation of computer animated images TI - An extension to optic flow analysis for the generation of computer animated images UR - http://hdl.handle.net/11427/12526 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/12526
dc.identifier.vancouvercitationWebb IA. An extension to optic flow analysis for the generation of computer animated images. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Computer Science, 1998 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/12526en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Computer Scienceen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherComputer Scienceen_ZA
dc.titleAn extension to optic flow analysis for the generation of computer animated imagesen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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