Application of image fusion for the IR images in frequency modulated thermal wave imaging for Non Destructive Testing (NDT)

Abstract

The raw images obtained in infrared Non-destructive Testing (NDT) should be processed by image processing techniques to improve the data usefulness. In this study, we attempted image fusions techniques to enhance the defect detection capability in glass fiber reinforced composite (GFRP) sample with 25 squared Teflon inserts of various sizes and located at different depths were investigated by means of frequency modulated thermal wave imaging. . Present work highlights application of image fusion based approaches for the defect detection using frequency modulated thermal excitation scheme and comparison has been made on these proposed schemes with respect to SNR improvements at each defect.