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Work in progress

Work in progress. Adapting SPSF (Small patch sphere fit) to fit to higher order shapes (as bellows window) Investigating harmonics Via surface model Via test of thick window Writing two papers as potential NIM publications & Mucool notes)

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Work in progress

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  1. Work in progress • Adapting SPSF (Small patch sphere fit) to fit to higher order shapes (as bellows window) • Investigating harmonics • Via surface model • Via test of thick window • Writing two papers as potential NIM publications & Mucool notes) • “Development of photogrammetric methods for quality control of non standard windows” • “Development of photogrammetric methods of stress analysis”

  2. Photogrammetry measurements John with the digital camera Twelve photos are taken at various pressure stages

  3. Preparation of the test at NIU View of the window, video camera, digital camera and tripod and projector View of the window, scale bars and targeting sys.

  4. New presentation tool from GSI • 3D Viewer • Rays • Camera stations • Scale bar • Autobar (Crucifix or Southern Cross?) • Shapes • Object targets

  5. Run first bundle (refine camera parameters and coded target positons) Scan image Detect Autobar and coded targets Resect for initial cameral parameters Automatch Make a list of coded targets in resected images Triangulate object coordinates If a coded target is in >=2 images Run final bundle Triangulate coded target coordinates Does image contain >= 4 coded targets? Resect camera parameters

  6. Photogrammetric Record, 16(93): 503–517 (April 1999) AN APPLICATION OF CLOSE RANGE PHOTOGRAMMETRY IN DOLPHIN STUDIES By S. BRA¨ GER and A. K. CHONG University of Otago Abstract Dolphins are agile animals and are very difficult to measure at sea. However, for the conservation of threatened or endangered species, measurement may be vital because it allows a demographic analysis of the population. Hector’s dolphin (Cephalorhynchus hectori) is a rare species living only in coastal waters around New Zealand where it is studied from small boats. This paper describes a stereophotogrammetric technique developed to measure body length accurately at sea without having to capture the individual. Constant calibration with the use of a control frame allowed accurate body length measurements of dolphins to be made with this low cost system, with a measurement error of 4 per cent to 6 per cent of actual length.

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