On the Resolution Limits of Superimposed Projection

Multi-projector super-resolution is the dual of multi-camera superresolution. 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 sam...

• Type: Conference
• Year: 2007
• Where: ICIP
• Authors: Niranjan Damera-Venkata, Nelson L. Chang
• Keywords: Achievable Resolution, ICIP 2007, Image Processing, Multiple Low Resolution, Nonuniform Sampling, Pixel Reconstruction Functions, Questions Concerning Resolution