On the Resolution Limits of Superimposed Projection

Multi-projector super-resolution is the dual of multi-camera super-resolution. The goal of projector super-resolution is to produce a high resolution frame via superimposition of multiple low resolution subframes. Prior work claims that it is impossible to improve resolution via superimposed project...

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Bibliographic Details
Main Authors: Damera-Venkata, N., Chang, N.L.
Format: Conference Proceeding
Language:English
Subjects:
alias cancellation
Cameras
Displays
Frequency
High-resolution imaging
image display
Image reconstruction
Image resolution
Image sampling
non-uniform sampling
Pixel
Sampling methods
Signal resolution
super-resolution
superimposed projection
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Summary:Multi-projector super-resolution is the dual of multi-camera super-resolution. The goal of projector super-resolution is to produce a high resolution frame via superimposition of multiple low resolution subframes. Prior work claims that it is impossible to improve resolution via superimposed projection except in specialized circumstances. Rigorous analysis has been previously restricted to the special case of uniform display sampling, which reduces the problem to a simple shift-invariant deblurring. To understand the true behavior of superimposed projection as an inverse of classical camera super-resolution, one must consider the effects of non-uniform displacements between component subframes. In this paper, we resolve two fundamental theoretical questions concerning resolution enhancement via superimposed projection. First, we show that it is possible to reproduce frequencies that are well beyond the Nyquist limit of any of the component subframes. Second, we show that nonuniform sampling and pixel reconstruction functions impose fundamental limits on achievable resolution.
ISSN:1522-4880
2381-8549
DOI:10.1109/ICIP.2007.4379843