Summary: Iso­Contour Volume Rendering
James Arvo
Program of Computer Graphics
Cornell University 1
Kevin Novins
Laboratoire iMAGIS
Institut IMAG 2
Abstract
In this paper we present a new approach to volume rendering in
which curves of constant intensity in image space, or iso­contours,
are computed directly for each view. The generated iso­contours
can be used to drive various visualization and feature­detection
algorithms. The approach imposes no restriction on the organization
of the data points and can accommodate a large class of radially­
symmetric filter functions. The technique works well for both
perspective and orthographic viewing projections. Each iso­contour
is defined by an ordinary differential equation, which is solved
numerically using a predictor­corrector method. A key element
of the algorithm is the use of image intensity gradients, which
we compute by means of a closed­form expression that holds at

Source: Arvo, Jim - Departments of Information and Computer Science & Electrical and Computer Engineering, University of California, Irvine

Collections: Computer Technologies and Information Sciences