Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
530076 | Pattern Recognition | 2013 | 17 Pages |
We present an experimental comparison of 3D feature descriptors with application to threat detection in Computed Tomography (CT) airport baggage imagery. The detectors range in complexity from a basic local density descriptor, through local region histograms and three-dimensional (3D) extensions to both to the RIFT descriptor and the seminal SIFT feature descriptor. We show that, in the complex CT imagery domain containing a high degree of noise and imaging artefacts, a specific instance object recognition system using simpler descriptors appears to outperform a more complex RIFT/SIFT solution. Recognition rates in excess of 95% are demonstrated with minimal false-positive rates for a set of exemplar 3D objects.
► Rigid item threat detection in 3D CT baggage imagery. ► CT imagery contains high degree of artefacts which hinder descriptor performance. ► Performance using a variety of local descriptors is compared. ► 3D SIFT orientation invariance methodology weak in this imagery. ► 95% detection rate is achieved using simple local descriptors.