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Subsampling models and anti-alias filters for 3-D automultiscopic displays
Janusz Konrad1, Philippe Agniel
1Department of Electrical and Computer Engineering, Boston University, Boston, MA 02215, USA. jkonrad@bu.edu
Summary
New automultiscopic displays offer glasses-free 3-D. This study models the display
Area of Science:
- Computer Vision
- Display Technology
- Signal Processing
Background:
- Automultiscopic displays enable glasses-free 3-D visualization.
- Multiplexing views causes aliasing and distortions without proper filtering.
- Aliasing degrades texture and depth perception in 3-D displays.
Purpose of the Study:
- To model the view multiplexing process in automultiscopic displays.
- To design optimal anti-aliasing filters for improved 3-D visualization.
- To reduce texture and depth distortions caused by irregular subsampling.
Main Methods:
- Modeling multiplexing using orthogonal, nonorthogonal, and union of shifted lattices.
- Applying multidimensional sampling theory and optimization tools.
- Designing finite-precision, low-complexity filters for graphics card implementation.
Main Results:
- Orthogonal lattice model yields separable low-pass filters reducing aliasing.
- Hexagonal-passband filters improve aliasing reduction for nonorthogonal lattices.
- Union of shifted lattices model is more accurate but offers no practical filter improvement.
- Practical filter design methods suitable for modern graphics hardware are presented.
Conclusions:
- Optimal anti-aliasing filters are crucial for high-quality automultiscopic 3-D displays.
- Lattice modeling provides a framework for designing effective anti-aliasing solutions.
- Developed filters enhance 3-D visualization by mitigating aliasing artifacts.
