Referenced Items are not available for this document.
Gradient information is used in volume rendering to classify and color samples along a ray. In this paper, we present an analysis of the theoretically ideal gradient estimator and compare it to some commonly used gradient estimators. A new method is presented to calculate the gradient at arbitrary sample positions, using the derivative of the interpolation filter as the basis for the new gradient filter. As an example, we will discuss the use of the derivative of the cubic spline. Comparisons with several other methods are demonstrated. Computational efficiency can be realized since parts of the interpolation computation can be leveraged in the gradient estimation
Published in:
Visualization and Computer Graphics, IEEE Transactions on
(Volume:2
,
Issue:
3
)
Date of Publication: Sep 1996
- Page(s):
- 242 - 254
- ISSN :
- 1077-2626
- INSPEC Accession Number:
- 5400840
- Digital Object Identifier :
- 10.1109/2945.537307
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Sep 1996
- Sponsored by :
- IEEE Computer Society
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