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oai:www.ideals.illinois.edu:2142/80701 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Ahuja, Narendra Aggarwal, Manoj 2015-09-25T20:07:41Z 2015-09-25T20:07:41Z 10000-01-01 2001 2001 This thesis also develops a new imaging model, which is more accurate than the conventional models (pinhole, thin-lens and Gaussian thick-lens). Our investigation of the standard models shows that the models make two implicit assumptions: first, that the aperture is coincident with the first principal plane, and second, that a point light source uniformly illuminates the aperture. Both of these conflict with the design of many available lenses. We show that this modeling error has serious consequences. We propose a new imaging model that takes into account the actual position of the aperture. We also study the impact of the second assumption about the uniform distribution of light across the aperture on photometric mapping. It shows the impact is quite significant and adds to those of more familiar cosine-fourth and vignetting effects. Made available in DSpace on 2015-09-25T20:07:41Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3017010.pdf: 7860765 bytes, checksum: 0340540bc530419398a5e2a2fb040fd4 (MD5) Previous issue date: 2001 Embargo set by: Seth Robbins for item 81983 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 174 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2001. http://hdl.handle.net/2142/80701 (MiAaPQ)AAI3017010 eng Engineering, Electronics and Electrical High Dynamic Range and Omnifocus Imaging text Electrical Engineering Electrical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.