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Machine Vision for High Precision Volume Measurement Applied to Levitated Containerless Materials ProcessingBy combining the best practices in optical dilatometry with new numerical methods, a high-speed and high precision technique has been developed to measure volume of levitated, containerlessly processed samples with sub- pixel resolution. Containerless processing provides the ability to study highly reactive materials without the possibility of contamination affecting thermo-physical properties. Levitation is a common technique used to isolate a sample as it is being processed. Noncontact optical measurement of thermo-ophysical properties is very important as traditional measuring methods cannot be used. Modern, digitally recorded images require advanced numerical routines to recover the sub-pixel locations of sample edges and, in turn produce high precision measurements.
Document ID
20050181939
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Bradshaw, R. C.
(Massachusetts Univ. Amherst, MA, United States)
Schmidt, D. P.
(Massachusetts Univ. Amherst, MA, United States)
Rogers, J. R.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Kelton, K. F.
(Washington Univ. Saint Louis, MO, United States)
Hyers, R. W.
(Massachusetts Univ. Amherst, MA, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Numerical Analysis
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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