NDLI: An analytical ray casting of volume data

Content Provider	IEEE Xplore Digital Library
Author	Moon-Ryun Jung Hyunwoo Park Doowon Paik
Copyright Year	1998
Description	Author affiliation: Sch. of Comput., Soongsil Univ., Seoul, South Korea (Moon-Ryun Jung)
Abstract	When volume data is visualized by the ray casting method, the color value of each pixel in the image is obtained by composing the color contributions of the sample points that lie on the ray cast from the pixel point. In most ray tracing methods, including M. Levoy's (1988; 1990) classical method, the color composition is formulated as a summation of the color contributions of the discrete sample points. However the more precise color composition is formulated as differential equations over the color contributions of the continuous sample points. The discrete formulation is used, because analytical solutions to the continuous formulation are hard to find. However we have discovered a semi-analytical solution to the continuous formulation of a typical ray tracing of volume data. We have applied both Levoy's method and ours to the same set of data, and compared the visual quality of both results. The comparison shows that our method produces a more fine grained visualization of volume data.
Starting Page	79
Ending Page	86
File Size	225032
Page Count	8
File Format	PDF
ISBN	0818686200
DOI	10.1109/PCCGA.1998.732031
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-10-26
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Casting Rendering (computer graphics) Ray tracing Read only memory Equations Computed tomography Magnetic resonance imaging Positron emission tomography Data visualization Color
Content Type	Text
Resource Type	Article

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