GlyphLens: View-Dependent Occlusion Management in the Interactive Glyph Visualization

Area of Science:

• Computer Graphics
• Information Visualization

Background:

• Glyphs are effective for multivariate data visualization.
• Visualizing 3D volumetric datasets with glyphs often leads to occlusion and visual clutter when placed on 2D surfaces or throughout 3D space.
• Existing methods can obscure 3D spatial structures.

Purpose of the Study:

• To propose a novel view-dependent interactive 3D lens technique to mitigate glyph occlusion in 3D volumetric data visualization.
• To preserve the spatial structure of glyphs and provide depth cues.
• To develop an interactive system for exploring glyph-based visualization applications.

Main Methods:

• Developed a view-dependent interactive 3D lens that displaces occluding glyphs using animation.
• Implemented two space deformation models and two lens shape models for glyph displacement.
• Incorporated depth-based brightness attenuation for enhanced depth perception.
• Created an interactive system with lens utilities for examining glyphs and features from various viewpoints.

Main Results:

• The proposed 3D lens effectively removes occluding glyphs, preserving context and spatial structures around user-interested regions.
• Depth-based brightness attenuation provides additional depth cues.
• The interactive system facilitates exploration of different glyph visualization scenarios.

Conclusions:

• The interactive 3D lens technique significantly improves the visualization of dense 3D volumetric data by reducing occlusion.
• The system offers enhanced data exploration capabilities for glyph-based applications.
• Further comparisons of display and interaction techniques are explored.