My best friend Ted and myself have started our own company, Hitchcock-Manthey, LLC.
I have several papers published in engineering journals. Primarily, these papers are on measuring strain (the amount of stretch) in sheet metal parts. I also have one patent, and belong to several professional societies.
|Manthey, David, "18th Century Ligatures and Fonts", http://www.orbitals.com/self/ligature/ligature.htm, November 2001||A brief set of guidelines the use of ligatures in 18th century documents. This is available online in HTML and in PDF format.|
|Manthey, David, "General Least-Squares - Direct Solutions and Bundle Adjustments", http://www.orbitals.com/self/least/least.htm, December 1999||A general discription of the least-squares method with a completely worked example. This is available online in HTML and in PDF format.|
|Manthey, D.W., E.M. Hitchcock, D.A. Prinn, and D. Lee, "Innovations in Video Acquisition and Processing Methods for Visual Databases", Proceedings of the 19th Annual Interservice/Industry Training Systems and Education Conference, December 1997, pp. 543-553.||An article discussing a more efficient way to create models of real objects for use in simulators.|
|Prinn, D., Manthey, D. W., Hitchcock, E. M., and Lee, D., "Improved Methods to Reproduce 3-D Surfaces of Objects", Proceedings of the International Body Engineering Conference (IBEC): Body Assembly and Manufacturing, September 30-October 2, 1997, Vol. 30, pp. 73-80.||An article discussing a way to measure auto body panels using unstructured light.|
|Prinn, Douglas A., David W. Manthey, Edward M. Hitchcock, and Daeyong Lee, "SurfaceGen: A PC-Based 3-D Surface Reconstruction System," Proceedings Numérisation 3D - Human Modeling Conference, May 28-29, 1997.||A technique for measuring surfaces using a patented target process and unstructured light.|
|Manthey, David W., Rebecca M. Pearce, and Daeyong Lee, "The Need for Surface Strain Measurement," Metalforming, Vol. 30, No. 5 (May 1996), pp. 48-54.||An article explaining how measuring the stretch in sheet metal helps fix forming problems.|
|Manthey, D. W., and D. Lee, "Recent Developments in a Vision-Based Surface Strain Measurement System," The Journal of The Minerals, Metals, & Materials Society (JOM); Vol. 47, No. 7 (July 1995), pp. 46-49.||This paper is available online from JOM. It shows a truly portable system for measuring surface shape and strain.|
|Manthey, D. W., R. M. Pearce, and D. Lee, "Portable 3D Data Acquisition Technology for Computer Image Generation Visual Databases", Final Report for SBIR Phase I Contract No. N61339-94-C-0058, Naval Air Warfare Center Training Systems Division (NAWCTSD), Orlando, FL, February, 1995.||A report on the feasibility of using video cameras, GPS (Global Positioning Satellites), and other equipment to construct flight simulator and shiphandling databases.|
|Manthey, David W., Keith N. Knapp II, and Daeyong Lee, "Calibration of a laser range-finding coordinate-measuring machine," Optical Engineering, Vol. 33, No. 10 (October 1994), pp. 3372-3380.||A clever way to calibrate a laser-based 3D surface scanner, simplifying hardware setup.|
|Manthey, D. W., R. M. Bassette, and D. Lee, "Application of the Latest Technology in Surface Strain Analysis for Metal Stamping Problem Solving," Total Process Improvement: PMA Technical Symposium Proceedings 1994, Vol. 4, pp. 397-409.||More on strain measurement.|
|Manthey, D. W., and J. P. Farhat, "Comparison Between Steel and Aluminum Strain Rate Effects," Proceedings of The PRESSTECH International Conference & Exposition, October 18-21, 1993, pp. 323-334.
-- also published as --
Manthey, David, and Joseph Farhat, "Comparing Steel and Aluminum Strain Rate Effects," The Fabricator, April, 1994, pp. 36-38.
|The speed at which metal is stretched affects how far it can be deformed before breaking.|
|Manthey, D. W., R. M. Bassette, and D. Lee, "Comparison of Different Surface Strain Measurement Techniques Used for Stamped Sheet Metal Parts," Proceedings of International Body Engineering Conference (IBEC) : Body Assembly & Manufacturing, September 21-23, 1993, pp. 106-111.||Verification that computerized strain measurement is valid.|
|Kapij, M. I., D. W. Manthey, and D. Lee, "The Development of Knowledge Based Systems to Solve Metal Stamping Problems," Best Manufacturing Solutions: Proceedings of the PMA Technical Symposium 1993, Vol. 3, pp. 67-76.||More on strain measurement.|
Method and apparatus for determining surface profile and/or surface strain
|This desribes how to automatically calibrate a camera for measuring the surface of an object. More information is available via the U.S. Patent Office web site and here via the IBM patent server.|
|American Society of Photogrammetry and Remote Sensing||The Minerals, Metals & Materials Society||IEEE Computer Society||Mathematical Association of America||The Photogrammetric Society|
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