Chair for Computer Aided Medical Procedures & Augmented Reality
Lehrstuhl für Informatikanwendungen in der Medizin & Augmented Reality

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P. Georgel, P. Schroeder, N. Navab
Navigation Tools for Augmented CAD Viewing
IEEE Computer Graphic and Application (CGA), special issue on 3D User Interfaces (bib)

The creation of a computer aided design (CAD) model is the first step in the development of any modern physical product. This model will be used during the complete life cycle of the product: prototyping, fabrication, maintenance and upgrade. During the construction, a discrepancy between the model and the object can occur. In order to maintain and upgrade the object it is mandatory to have a model that represents the reality. So that one can have an up-to-date model one has to verify it and sometimes update it. We propose a scalable solution where CAD software has been augmented with pictures of the object. Still images have been aligned to the model allowing visualization of the model and the object at the same time. This creates what can be called a mixed view. The virtual camera that renders the model in a mixed view is restricted by the still image because the alignment between the image and the model has to be maintained. We developed tools to navigate in this mixed world. We transposed the zoom and pan from 2D user interfaces in order to navigate in the mixed view. Additionally we introduced tools for intuitive navigation within a set of mixed views.
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