A New 2 D / 3 D MultiModality Image Registration Application for Non-Destructive Generic Aerospace Casting Evaluation

Non-Destructive Evaluation (NDE) is a group of data analysis techniques used in industry to evaluate the property of a material, component or product from sensors without causing damage. It often requires different techniques, each proving a distinct set of useful data. Infrared (IR) thermography-based and computed tomography (CT) radiography-based methods are the most common imaging methods. While a multi-modality solution may provide a richer information for making inspection decisions, there is a need to find the optimal spatial transformation necessary to register the useful information carried in different modality sources. Currently, there is a lack of methods for multimodality image registration in industrial inspection applications. An image registration scheme for finding spatial transformation between 2D IR image and 3D CT images of generic aerospace castings is presented for the first time. Information theory based similarity measure is shown to be applicable with both theoretical support and experimental

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