Effects of thermal contrast on size estimation of debonds in different external wall’s composite finishes via passive infrared thermography and a modified gradient algorithm

Fung Chu Janet Sham, Wai Lok Lai, Sin Yau Chiu

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review


This paper aims to present a study on the effects of thermal contrast in various external wall’s composite finishes on estimated debond size by using passive infrared thermography and a modified gradient algorithm. The effects of thermal contrast on debond size estimation by the proposed method were evaluated under 2 conditions: different finishes materials and changes of heat absorption during a 13-hr diurnal cycle. This study reports a quantitative investigation of detectability by comparing its estimated size with actual size.
Original languageEnglish
Number of pages9
Publication statusPublished - Jul 2019
EventThe 3rd QRIT Conference Asia - Tokyo, Japan
Duration: 1 Jul 20192 Jul 2019


ConferenceThe 3rd QRIT Conference Asia

Cite this