New Visualization of Surfaces in Parallel Coordinates - Eliminating Ambiguity and Some "Over-Plotting"
| dc.creator | Izhakian, Zur | |
| dc.date | 2004-03-04 | |
| dc.date.accessioned | 2026-07-07T03:20:58Z | |
| dc.date.available | 2026-07-07T03:20:58Z | |
| dc.description | $\cal{A}$ point $P \in \Real^n$ is represented in Parallel Coordinates by a polygonal line $\bar{P}$ (see \cite{Insel99a} for a recent survey). Earlier \cite{inselberg85plane}, a surface $σ$ was represented as the {\em envelope} of the polygonal lines representing it's points. This is ambiguous in the sense that {\em different} surfaces can provide the {\em same} envelopes. Here the ambiguity is eliminated by considering the surface $σ$ as the envelope of it's {\em tangent planes} and in turn, representing each of these planes by $n$-1 points \cite{Insel99a}. This, with some future extension, can yield a new and unambiguous representation, $\barσ$, of the surface consisting of $n$-1 planar regions whose properties correspond lead to the {\em recognition} of the surfaces' properties i.e. developable, ruled etc. \cite{hung92smooth}) and {\em classification} criteria. It is further shown that the image (i.e. representation) of an algebraic surface of degree 2 in $\Real^n$ is a region whose boundary is also an algebraic curve of degree 2. This includes some {\em non-convex} surfaces which with the previous ambiguous representation could not be treated. An efficient construction algorithm for the representation of the quadratic surfaces (given either by {\em explicit} or {\em implicit} equation) is provided. The results obtained are suitable for applications, to be presented in a future paper, and in particular for the approximation of complex surfaces based on their {\em planar} images. An additional benefit is the elimination of the ``over-plotting'' problem i.e. the ``bunching'' of polygonal lines which often obscure part of the parallel-coordinate display. | |
| dc.description | 13 pages 8 figures | |
| dc.identifier | https://arxiv.org/abs/cs/0403004 | |
| dc.identifier | http://arxiv.org/abs/cs/0403004 | |
| dc.identifier | Journal of WSCG, 2004, volume 1-3, no 12, pp 183-191, ISSN 1213-6972 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/32023 | |
| dc.subject | Other Computer Science | |
| dc.subject | F.2.1.;I.1.1 | |
| dc.title | New Visualization of Surfaces in Parallel Coordinates - Eliminating Ambiguity and Some "Over-Plotting" | |
| dc.type | text |