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Spherical Harmonic and Point Illumination Basis for Reflectometry and
Relighting
by
Borom Tunwattanapong
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(Computer Science)
August 2014
Copyright 2014 Borom Tunwattanapong
Object Description
| Title | Spherical harmonic and point illumination basis for reflectometry and relighting |
| Author | Tunwattanapong, Borom |
| Author email | tunwatta@usc.edu;boromt@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Computer Science |
| School | Viterbi School of Engineering |
| Date defended/completed | 2014-08-03 |
| Date submitted | 2014-09-03 |
| Date approved | 2014-09-03 |
| Restricted until | 2014-09-03 |
| Date published | 2014-09-03 |
| Advisor (committee chair) |
Debevec, Paul Ghosh, Abhijeet |
| Advisor (committee member) |
Teng, Shang-Hua Neumann, Ulrich Kratky, Andreas |
| Abstract | This dissertation presents a system for acquiring spatially‐varying reflectance information and relighting various surface types by observing the objects under active basis illumination. Most types of real‐world objects are illuminated with a succession of spherical harmonic illumination conditions. From the response of the object to the harmonics, we can separate diffuse and specular reflections, estimate world‐space diffuse and specular normals and compute anisotropic roughness parameters for each view of the object. ❧ Additionally, this work proposes a system to acquire the spatially‐varying reflectance properties of flat samples with minor surface orientation variation using an LCD monitor. The system illuminates the samples with low frequency Fourier transform illumination to encode the reflectance function of the samples, in the form of Fourier transform coefficients. Then the reflectance properties of the samples are recovered by analyzing the Fourier transform coefficients of different frequencies. ❧ For objects with complicated reflectance or geometry, this work proposes a system that practically acquires relightable and editable models of the objects. The system employs a combination of spherical harmonics and local illumination which reduces the number of required photographs by an order of magnitude compared to the traditional techniques. ❧ Finally, for faces, this work proposes a novel technique to rapidly capture and estimate reflectance properties using an array of cameras and flashes. The reflectance properties can also be used to reconstruct complete 3‐D models of the face. |
| Keyword | 3D scanning; basis illumination; computer graphics; face scanning; reflectance properties; spherical harmonics |
| Language | English |
| Format (imt) | application/pdf |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m |
| Contributing entity | University of Southern California |
| Rights | Tunwattanapong, Borom |
| Physical access | The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given. |
| Repository name | University of Southern California Digital Library |
| Repository address | USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA |
| Repository email | cisadmin@lib.usc.edu |
| Filename | etd-Tunwattana-2875.pdf |
| Archival file | uscthesesreloadpub_Volume14/etd-Tunwattana-2875.pdf |
Description
| Title | Page 1 |
| Repository email | cisadmin@lib.usc.edu |
| Full text | Spherical Harmonic and Point Illumination Basis for Reflectometry and Relighting by Borom Tunwattanapong A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (Computer Science) August 2014 Copyright 2014 Borom Tunwattanapong |
