A method and system for non-destructive, reference-free thermographic detection of sub-surface defects uses an infrared camera to capture multiple, spatially different images of a sample that has been heated and allow to cool to equilibrium temperature. The temperature-time data obtained for each pixel...http://www.google.com.au/patents/US6751342?utm_source=gb-gplus-sharePatent US6751342 - System for generating thermographic images using thermographic signal reconstruction
