Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

FP5

INDET Résumé de rapport

Project ID: G4RD-CT-2002-00830
Financé au titre de: FP5-GROWTH
Pays: United Kingdom

Multimodality data fusion

A unique software tool has been developed to enable integrated 3D visualisation of multi-modality non-destructive testing (NDT) images superimposing on their CAD models, thereby facilitating cross-modality interpretation of the image features observed.

The software provides users four different image fusion methods, with one method based on direct fusion of multi-modality NDT images in the spatial domain on a pixel-by-pixel basis, and three methods based on indirect fusion of multi-modality images via their wavelets coefficients in the wavelet domain. For two of the wavelet fusion methods, namely, fusion by averaging and fusion by energy comparison, fusion rules do not depend on the material structures.

Whilst the fusion by averaging constructs the fused image based on a weighted average of the wavelet coefficients, the fusion by energy comparison constructs the fused image based on the wavelet coefficients with significant local energy. For the third wavelet fusion method based on region, different thresholds can be assigned to different decomposed regions, thereby allowing the fused image to be constructed based on the wavelet coefficients responsible for the representation of the most predominant features in each region and of suspected defects.

Reported by

UNIVERSITY OF CENTRAL LANCASHIRE
Computing and Technology Building
PR1 2HE PRESTON
United Kingdom