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Interactive volume navigation

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4 Author(s)
Brady, M.L. ; Microcomput. Res. Labs., Intel Corp., Santa Clara, CA, USA ; Jung, K.K. ; Nguyen, H.T. ; Nguyen, T.P.Q.

Volume navigation is the interactive exploration of volume data sets by “flying” the viewpoint through the data, producing a volume rendered view at each frame. We present an inexpensive perspective volume navigation method designed to be run on a PC platform with accelerated 3D graphics hardware. The heart of the method is a two-phase perspective ray casting algorithm that takes advantage of the coherence inherent in adjacent frames during navigation. The algorithm generates a sequence of approximate volume-rendered views in a fraction of the time that would be required to compute them individually. The algorithm handles arbitrarily large volumes by dynamically swapping data within the current view frustum into main memory as the viewpoint moves through the volume. We also describe an interactive volume navigation application based on this algorithm. The application renders gray-scale, RGB, and labeled RGB volumes by volumetric compositing, allows trilinear interpolation of sample points, and implements progressive refinement during pauses in user input

Published in:

Visualization and Computer Graphics, IEEE Transactions on  (Volume:4 ,  Issue: 3 )

Date of Publication:

Jul-Sep 1998

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