Advanced Graphical User Interface for Analysis of Infrared Thermographic Sequence using MATLAB

The Infrared non-destructive evaluation (IRNDE) is an emerging approach for non-contact inspection of various solid materials such as metals, composites and semiconductors for industrial and research interest. Data processing is an essential step in IRNDE in order to visualize the subsurface defects in the sample and determine the shapes and sizes of the same. The data processing intends to analyse temporal variations in the contrast of each pixel, relative to defect-free reference point on the sample. For that, several post processing algorithms are applied to the recorded thermograms. In this work, it is proposed to an advanced graphical user interface (GUI) for processing the recorded thermograms by IR camera using MATLAB, that supports preprocessing, processing and quantification is presented. Investigations arecarried out using the thermal image sequence recorded with different active thermographic methods: frequency modulated thermal wave imaging (FMTWI) Pulse thermography (PT), lock in thermography (LT). A comparative analysis of the results from different themographic techniques for defect visualization is presented.