NDLI: Differential volume rendering: a fast volume visualization technique for flow animation

Content Provider	ACM Digital Library
Author	Johnson, Christopher R. Shen, Han-Wei
Abstract	We present a direct volume rendering algorithm to speed up volume animation for flow visualizations. Data coherency between consecutive simulation time steps is used to avoid casting rays from those pixels retaining color values assigned to the previous image. The algorithm calculates the differential information among a sequence of 3D volumetric simulation data. At each time step the differential information is used to compute the locations of pixels that need updating and a ray-casting method is utilized to produce the updated image. We illustrate the utility and speed of the differential volume rendering algorithm with simulatin data from computational bioelectric and fluid dynamics applications. We can achieve considerable disk-space savings and nearly real-time rendering of 3D flows using low-cost, single processor workstations* for models which contain hundreds of thousands of data points.
Starting Page	180
Ending Page	187
Page Count	8
File Format	PDF
ISBN	0780325214
ISSN	10702385
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1994-10-17
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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Differential volume rendering: a fast volume visualization technique for flow animation