Exploring Photonic Extremum Lines for 3D Surface Visualization
Explore the concept of Photonic Extremum Lines (PELs) for visualizing 3D surfaces, with comparisons to various feature lines techniques. The project goals include implementing PELs and alternative feature lines methods for data visualization, emphasizing interactive and GPU-accelerated approaches. The work plan outlines tasks including literature review, PEL implementation, and evaluation strategies.
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Presentation Transcript
Exploring Photic Extremum Lines (PELs) for 3D Surface Visualization Mario Rinc n-Nigro Slides based on Xie et al Vis 2007 Presentation
Feature Lines: Contours Pros: Show strongest cues with model-to-background distinction Cons: Cannot capture structure of the interior of the shape
Feature Lines: Suggestive Contours Pros: Extends contours of surface. Captures concave regions Cons: Cannot illustrate salient features in convex regions
Feature Lines: Ridge-Valley Lines Pros: Captures convex and concave regions Cons: View and light independent.
Photonic Extremum Lines (PELs) [Xie et al. IEEE TVCG 2007] In 2D image, an edge point is defined as a point at which the gradient magnitude assumes a maximum in the gradient direction. On 3D surfaces, the PEL is a set of points where the variation of illumination in the direction of its gradient reaches the local maximum.
Photonic Extremum Lines Captures inner structure Appears in both convex and concave areas View and light-dependent
Reported Performance [Xie et al. IEEE TVCG 2007]
Project Goals Implement Photum Extremum Lines [Xie et al. IEEE TVCG 2007] Implement alternative feature lines techniques for comparison purposes: Contours Suggestive contours Ridges and valleys Visualize different kind of data: Iso-surfaces from 3D scalar data Streamtapes/streamsurfaces from 3D vector fields Evaluation is not clear: - User study - Objective metric (?) [Xie et al. IEEE TVCG 2007] Report on findings Be interactive Use GPU acceleration if required [Chen et al CGF 2011] [Hummel et al IEEE TVCG 2010]
Work Plan Week 1 (Nov 5): - Literature review - Prepare topic presentation Week 2 (Nov 12) & 3 (Nov 19): - PEL implementation Week 4 (Nov 26): - Implement alternative techniques for feature lines rendering: contours, suggestive contours, ridges and valleys. Week 5 (Dec 3): - Buffer week. Either: Catch up, if delayed Try something else (e.g. GPU acceleration), otherwise Week 6 (Dec 10): - Final presentation
