Region-based wavelet fusion of ultrasonic, radiographic and shearographyc non-destructive testing images

摘要

This paper describes image fusion techniques developed for integration ofrnmulti-modal non-destructive (NDT) testing images. The paper starts with arnbrief description of the image registration technique used to match each NDTrnimage to the corresponding component CAD model. Three fusion techniques arernthen presented in detail and applied to real ultrasonic, radiographic andrnshearographic images acquired from an aircraft component. From the fusedrnimages obtained, the region-based fusion approach is shown to offer arnsuperior quality for defect interpretation, because the fusion parametersrnare optimised according to the unique geometrical and material structurerncontained in different parts of the component under inspection.