Stereo imaging velocimetry for microgravity applications

Brian B. Miller; MaryJo B. Meyer; Mark D. Bethea

doi:10.1117/12.188086

30 September 1994 Stereo imaging velocimetry for microgravity applications

Brian B. Miller, MaryJo B. Meyer, Mark D. Bethea

Proceedings Volume 2210, Space Optics 1994: Space Instrumentation and Spacecraft Optics; (1994) https://doi.org/10.1117/12.188086
Event: Space Optics '94, 1994, Garmisch, Germany

Abstract

Stereo imaging velocimetry is the quantitative measurement of three- dimensional flow fields using two sensors recording data from different vantage points. The system described in this paper, under development at NASA Lewis Research Center in Cleveland, Ohio, USA, uses two CCD cameras placed perpendicular to one another, laser disk recorders, an image processing substation and a 586-based computer to record data at standard NTSC video rates (30 Hertz) and reduce it offline. The flow itself is marked with seed particles, hence the fluid must be transparent. The velocimeter tracks the motion of the particles, and from these we deduce a multipoint (500 or more), quantitative map of the flow. Conceptually, the software portion of the velocimeter can be divided into distinct modules. These modules are: camera calibration, particle finding (image segmentation) and centroid location, particle overlap decomposition, particle tracking, and stereo matching. We will discuss our approach to each module in this paper, and give our currently achieved speed and accuracy for each where available.

Citation Download Citation

Brian B. Miller, MaryJo B. Meyer, and Mark D. Bethea "Stereo imaging velocimetry for microgravity applications", Proc. SPIE 2210, Space Optics 1994: Space Instrumentation and Spacecraft Optics, (30 September 1994); https://doi.org/10.1117/12.188086

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available