Reference-free analysis of flash thermography data

Steven M. Shepard; Yulin Hou; Tasdiq Ahmed; James R. Lhota

doi:10.1117/12.669396

18 April 2006 Reference-free analysis of flash thermography data

Steven M. Shepard, Yulin Hou, Tasdiq Ahmed, James R. Lhota

Proceedings Volume 6205, Thermosense XXVIII; 620513 (2006) https://doi.org/10.1117/12.669396
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

Since its introduction 5 years ago, the Thermographic Signal Reconstruction (TSR) method has become a widely accepted approach to processing and interpreting active thermography data. Although the technique generates a noise free replica of an experimental data sequence, it is the time derivatives of the replica that have proved to be most useful. In particular, the second derivative of the TSR signal offers increased sensitivity, noise and artifact suppression and reference-free evaluation and quantification of results. Unlike contrast methods, where a point is evaluated by comparison to a defect-free reference, the TSR second derivative of a single pixel indicates the presence of a subsurface defect, or in the absence of a defect, it can be used to measure the local thermal diffusivity.

Citation Download Citation

Steven M. Shepard, Yulin Hou, Tasdiq Ahmed, and James R. Lhota "Reference-free analysis of flash thermography data", Proc. SPIE 6205, Thermosense XXVIII, 620513 (18 April 2006); https://doi.org/10.1117/12.669396

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