Volume visualization of large data sets suflers from the same problem that many other visualization modalities suflerfrom either one can visualize the entire data set and loose small details or visualize a small region and loose the context. In this paper; we present a magnification lens technique for volume visualization. While the notion of a magnification-lens is not new, and other techniques attempt to simulate the physical properties of a magni&ing lens, our contribution is i n developing a magnification lens that is fast, can be implemented using a fairly small sofhuare overhead, and has a natural, intuitive appearance. lhe issue with magnification lens is the border; or transition, region. The lens center and exterior have a constant zoom factor; and are simple to render. I t is the border region that blends between the external and interior magnification, and has a nonconstant magnification. We use the "perspectivecorrect textures" capability, mailable in most current graphics systems, to produce a lens with a tessellated border region that approximates linear compression with respect to the radius of the magnification lens. We discuss how a "cubic" border can mitigate the discontinuities resulting from the use of a linearfwrction, without significant performance loss. We discuss various issues concerning development of a three-dimensional magnification lens.
LaMar et al. REF have presented a magnification lens with a tessellated border region according to the radius of lenses and the texture information.
A magnification lens for interactive volume visualization
Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001
Proceedings Ninth Pacific Conference on Computer Graphics and Applications. Pacific Graphics 2001
Computer Science