Shape from heating: a two-dimensional approach for shape extraction in infrared images
Abstract
Pulse-transient IR thermography enables detection and quantification of subsurface defects. However, defect detection can be perturbed by the geometry of the part, if not planar. A method is presented that, from a single IR image recorded at the end of the thermal pulse, enables one to evaluate the shape of a nonplanar part and then apply a correction on subsequent thermograms in the time sequence to increase the reliability of defect detection. The method uses some of the concepts of the `shape from shading' theory from the machine vision field.
- Publication:
-
Optical Engineering
- Pub Date:
- February 1997
- DOI:
- 10.1117/1.601210
- Bibcode:
- 1997OptEn..36..370P