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oai:www.ideals.illinois.edu:2142/23593 2023-07-10 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Ahuja, Narendra Abbott, Amos Lynn 2011-05-07T14:19:56Z 2011-05-07T14:19:56Z 10000-01-01 1990 This thesis describes a computational method for surface estimation from stereo images. The images are obtained with a dynamically controlled camera system, having imaging parameters which are selected on the basis of an evolving composite description of the surfaces in the environment. This follows the paradigm of active vision, which implies a feedback mechanism to select physical sensory parameters in order to improve the quality of the derived results. In addition to stereo disparity, camera vergence and focus are used as sources of depth information. Through the integration of these cues, a global surface map of the visual field is synthesized by systematically scanning the scene, combining estimates of adjacent, local surface patches, each acquired by an intermediate camera configuration and having a small depth range. The method provides for the local optimization of calibrated values for imaging parameters. This approach, when coupled with dynamic image acquisition and analysis, results in a powerful mechanism for autonomous surface reconstruction. Made available in DSpace on 2011-05-07T14:19:56Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9026116.pdf: 6874431 bytes, checksum: fcf1ba6233855c237214d7320ce5244e (MD5) Previous issue date: 1990 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:05:32Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:31:24-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9026116 (UMI)AAI9026116 http://hdl.handle.net/2142/23593 eng Copyright 1990 Abbott, Amos Lynn Engineering, Electronics and Electrical Computer Science Dynamic integration of depth cues for surface reconstruction from stereo images text Dissertation Ph.D. Engineering, Electronics and Electrical Computer Science Engineering, Electronics and Electrical Computer Science University of Illinois at Urbana-Champaign