Comparative Study of Different Pressure-Sensitive-Paint13; Image Registration Techniques

Venkatakrishnan, L (2004) Comparative Study of Different Pressure-Sensitive-Paint13; Image Registration Techniques. AIAA Journal, 42 (11). pp. 2311-2319. ISSN 0001-1452

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Abstract

Image alignment plays an important role in pressure-sensitive-paint (PSP) data processing. A systematic comparative13; study of two commonly used approaches, namely, image transformation using image-warping transforms13; before ratioing and, alternatively, image mapping on to three-dimensional model space (using resection methodology13; prior to ratioing) prior to ratioing, is attempted here. PSP results along with conventional static port data as13; on a generic aircraft model at a freestream Mach number of 0.6 and incidence of 10 deg (taken from earlier work)13; are utilized to critically assess the merit of the preceding two approaches. The analyses show that image-warping13; methods can result in larger errors in regions of strong spatial gradients of pressure and on bodies that are significantly13; three dimensional. Further, the resolution obtained from the resection approach is significantly greater (of13; the order of less than a pixel) compared to the transform methods.

Item Type:	Journal Article
Uncontrolled Keywords:	pressure sensitive paint; image registration; resection
Subjects:	AERONAUTICS > Research and Support Facilities (Air) AERONAUTICS > Aerodynamics
Division/Department:	Experimental Aerodynamics Division
Depositing User:	Users 7 not found.
Date Deposited:	07 Mar 2005
Last Modified:	24 May 2010 09:39
URI:	http://nal-ir.nal.res.in/id/eprint/717

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