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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 歐陽明(Ming Ouhyoung) | |
| dc.contributor.author | Tsung-Yi Wu | en |
| dc.contributor.author | 吳宗益 | zh_TW |
| dc.date.accessioned | 2021-06-13T06:35:24Z | - |
| dc.date.available | 2006-01-19 | |
| dc.date.copyright | 2006-01-19 | |
| dc.date.issued | 2006 | |
| dc.date.submitted | 2006-01-13 | |
| dc.identifier.citation | [AMN+98] Sunil Arya, David M. Mount, Nathan S. Netanyahu, Ruth Sil-
verman, and Angela Y. Wu. An optimal algorithm for approx- imate nearest neighbor searching ‾xed dimensions. J. ACM, 45(6):891{923, 1998. [Bel] Gleb Beliakov. Interpolation of Lipschitz functions. (http://www.deakin.edu.au/ gleb/lip.html). [CT81] Robert L. Cook and Kenneth E. Torrance. A re°ectance model for computer graphics. In SIGGRAPH '81: Proceedings of the 8th annual conference on Computer graphics and interactive techniques, pages 307{316, 1981. [Dan01] Kristin J. Dana. BRDF/BTF measurement device. In Proceed- ings of IEEE International Conference on Computer Vision, pages 460{466, 2001. [FB81] Martin A. Fischler and Robert C. Bolles. Random sample con- sensus: A paradigm for model ‾tting with applications to im- age analysis and automated cartography. Communications of the ACM, 24(6):381{395, June 1981. 46 [FI96] Michael S. Floater and Armin Iske. Multistep scattered data interpolation using compactly supported radial basis functions. J. Comput. Appl. Math., 73(1-2):65{78, 1996. [GCHS] Dan B. Goldman, Brian Curless, Aaron Hertzmann, and Steve Seitz. Shape and spatially-varying BRDFs from photometric stereo. Technical report. [HS03] Aaron Hertzmann and Steven M. Seitz. Shape and materials by example: A photometric stereo approach. In Proceedings of IEEE Conference on Computer Vision and Pattern Recogni- tion, volume 1, pages 533{540, 2003. [HTSG91] Xiao D. He, Kenneth E. Torrance, François X. Sillion, and Donald P. Greenberg. A comprehensive physical model for light re°ection. In SIGGRAPH '91: Proceedings of the 18th annual conference on Computer graphics and interactive tech- niques, pages 175{186, 1991. [Lew93] Robert R. Lewis. Making shaders more physically plausible. In Eurographics Workshop on Rendering, pages 47{62, 1993. [LFTG97] Eric P. F. Lafortune, Sing-Choong Foo, Kenneth E. Torrance, and Donald P. Greenberg. Non-linear approximation of re- °ectance functions. In SIGGRAPH '97: Proceedings of the 24th annual conference on Computer graphics and interactive tech- niques, pages 117{126, 1997. 47 [LWS97] Seungyong Lee, George Wolberg, and Sung Yong Shin. Scat- tered data interpolation with multilevel B-splines. IEEE Trans- action on Visualization and Computer Graphics, 3(3):228{244, July 1997. [MPBM03a] Wojciech Matusik, Hanspeter P‾ster, Matt Brand, and Leonard McMillan. A data-driven re°ectance model. ACM Transactions on Graphics, 22(3):759{769, July 2003. [MPBM03b] Wojciech Matusik, Hanspeter P‾ster, Matthew Brand, and Leonard McMillan. E±cient isotropic BRDF measurement. In EGRW '03: Proceedings of the 14th Eurographics workshop on Rendering, pages 241{247, 2003. [MWL+99] Stephen R. Marschner, Stephen H. Westin, Eric P. F. Lafor- tune, Kenneth E. Torrance, and Donald P. Greenberg. Image- based BRDF measurement including human skin. In Proceed- ings of 10th Eurographics Workshop on Rendering, pages 139{ 152, 1999. [MWLT00] Stephen R. Marschner, Stephen H. Westin, Eric P. F. Lafor- tune, and Kenneth E. Torrance. Image-based bidirectional re- °ectance distribution function measurement. Applied Optics, 39(16):2592{2600, June 2000. [MZKB] Satya P. Mallick, Todd E. Zickler, David J. Kriegman, and Peter N. Belhumeur. Beyond Lambert: Reconstructing specular 48 surfaces using color. In Proc. IEEE Conf. Computer Vision and Pattern Recognition (CVPR) 2005. (to appear). [Pho75] Bui Tuong Phong. Illumination for computer generated pic- tures. Commun. ACM, 18(6):311{317, 1975. [PL97] I.K. Park and S.U. Lee. Geometric modeling from scattered 3-d range data. In ICIP97, pages II:712{xx, 1997. [Rus98] Szymon M. Rusinkiewicz. A new change of variables for e±cient BRDF representation. In Rendering Techniques '98: Proceed- ings of Eurographics Rendering Workshop, pages 11{12, 1998. [Sim96] Je®rey S. Simono®. Smoothing Methods in Statistics. Springer, 1996. [TS67] K. Torrance and E. Sparrow. Theory for o®-specular re°ec- tion from roughened surfaces. Journal of the Optical Society of America, 57(9):1105{1114, 1967. [TSB66] K. Torrance, E. Sparrow, and R. Birkebak. Polarization, direc- tional distribution, and o®-specular peak phenomena in light re°ected from roughened surfaces. Journal of the Optical Soci- ety of America, 56(7):916V{925, 1966. [War92] Gregory J. Ward. Measure and modeling anisotropic re°ection. In Computer Graphics,, volume 26, pages 265{272, July 1992. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/34839 | - |
| dc.description.abstract | In order to create photo-realistic images, we need to know how light is reflected from different materials. The bidirectional reflectance distribution functions (BRDF) plays an important role in modeling reflectance of materials. In this thesis, a process is presented to extract per-pixel BRDF measurements from multiple photographs of an object from the same viewpoint but under different directions of light sources. After the measurement is done, we use a statistical smoothing method to estimate the whole BRDF from measured data. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T06:35:24Z (GMT). No. of bitstreams: 1 ntu-95-R92922056-1.pdf: 6416515 bytes, checksum: 6e368769c788ed33428c499ef95a580d (MD5) Previous issue date: 2006 | en |
| dc.description.tableofcontents | 1 Introduction 5
1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1.1 BRDF . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1.2 Classes of BRDFs . . . . . . . . . . . . . . . . . . . . . 8 1.1.3 Properties of BRDFs . . . . . . . . . . . . . . . . . . . 9 1.2 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.3 Thesis Organization . . . . . . . . . . . . . . . . . . . . . . . . 11 2 Previous Work 12 2.1 BRDF Models . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.1.1 Phenomenological models . . . . . . . . . . . . . . . . 13 2.1.2 Physical-based models . . . . . . . . . . . . . . . . . . 13 2.2 BRDF Measurement . . . . . . . . . . . . . . . . . . . . . . . 14 3 Data Acquisition 16 3.1 Light Calibration . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.2 Acquiring Images . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.3 Computing Surface Orientation . . . . . . . . . . . . . . . . . 20 3.3.1 Lambertian photometric stereo . . . . . . . . . . . . . 21 3.3.2 Outlier removing . . . . . . . . . . . . . . . . . . . . . 22 3.4 Segmentation for Objects with Multiple Materials . . . . . . . 26 3.5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4 Data Presentation and Interpolation 28 4.1 Coordinate System . . . . . . . . . . . . . . . . . . . . . . . . 29 4.2 Interpolation Scheme . . . . . . . . . . . . . . . . . . . . . . . 32 4.2.1 The Epanechnikov kernel . . . . . . . . . . . . . . . . . 32 4.2.2 Searching strategy . . . . . . . . . . . . . . . . . . . . 32 5 Result 35 6 Conclusions and Future Work 43 6.1 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 6.2 Future Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 6.2.1 Precise surface normal estimation . . . . . . . . . . . . 44 6.2.2 BRDF measurement for objects with complex shape . . 44 6.2.3 Reflectance representation . . . . . . . . . . . . . . . . 45 | |
| dc.language.iso | zh-TW | |
| dc.subject | 雙向反射分佈函數 | zh_TW |
| dc.subject | 擷取 | zh_TW |
| dc.subject | 影像方式 | zh_TW |
| dc.title | 以影像方式擷取非球型物體之雙向反射分佈函數 | zh_TW |
| dc.title | Image-based BRDF Acquisition for Non-spherical Objects | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 94-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.coadvisor | 莊永裕(Yung-Yu Chuang) | |
| dc.contributor.oralexamcommittee | 陳炳宇(Bing-Yu Chen) | |
| dc.subject.keyword | 擷取,雙向反射分佈函數,影像方式, | zh_TW |
| dc.subject.keyword | Acquisition,BRDF,Image-based, | en |
| dc.relation.page | 49 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2006-01-13 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 資訊工程學研究所 | zh_TW |
| 顯示於系所單位： | 資訊工程學系 | |
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