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Title: Efficient rendering of radial basis function for illumination adjustable image
Other Titles: Zhao du ke bian tu ji yu ban jing shi han shu de gao xiao hui zhi fang fa
Authors: Ho, Tze Yui (何子銳)
Department: Department of Electronic Engineering
Degree: Master of Philosophy
Issue Date: 2007
Publisher: City University of Hong Kong
Subjects: Image processing.
Neural networks (Computer science)
Notes: ix, 62 leaves : ill. 30 cm.
Thesis (M.Phil.)--City University of Hong Kong, 2007.
Includes bibliographical references (leaves 59-62)
CityU Call Number: TA1637 .H63 2007
Type: thesis
Abstract: An illumination adjustable image (IAI) contains a large number of pre-recorded reference images under various lighting directions. It describes the appearance of a scene illuminated under various lighting directions. Relighting of a scene under complicated lighting conditions can be generated from the IAI. Using the radial basis function (RBF) approach to represent an IAI is proven to be more efficient than using the spherical harmonic approach. This thesis investigates two practical issues of using the RBF approach for relighting an IAI under various lighting configurations. Firstly, a partial reconstruction scheme for relighting a scene under local light sources is presented, which is facilitated by the locality of RBF basis functions. Compared with the conventional approach, the proposed scheme offers the similar distortion performance but it has a much faster rendering speed. The implementations of rendering directional light source, point light source and slide projector are presented. Secondly, a direct projection method for environment relighting of a scene is presented which supports not only static environment rotation but also time-varying environment.
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