Surface Extraction from Multi-Material Components for Metrology using Dual Energy CT

Abstract-- This paper describes a novel method for creating surface models of multi-material components using dual energy computed tomography (DECT). The application scenario is metrology and dimensional measurement in industrial high resolution 3D x-ray computed tomography (3DCT). Based on the dual source / dual exposure technology this method employs 3DCT scans of a high precision micro-focus and a high energy macro-focus x-ray source. The presented work makes use of the advantages of dual x-ray exposure technology in order to facilitate dimensional measurements of multi-material components with high density material within low density material. We propose a workflow which uses image fusion and local surface extraction techniques: a prefiltering step reduces noise inherent in the data. For image fusion the datasets have to be registered. In the fusion step the benefits of both scans are combined. The structure of the specimen is taken from the low precision, blurry, high energy datas...

• Type: Conference
• Year: 2007
• Where: VIS
• Authors: Christoph Heinzl, Johann Kastner, Eduard Gröller
• Keywords: Dual X-ray Exposure, IEEE Visualization, Multi-material Industrial Components, VIS 2007, Visualization, X-ray Computed Tomography