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Updated: May 11, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
Published on: December 3, 2013
Computational superposition projector for extended depth of field and field of view
Tomoya Nakamura1, Ryoichi Horisaki, Jun Tanida
1Department of Information and Physical Sciences, Graduate School of Information Science and Technology, Osaka University, Suita, Osaka, Japan.
Abstract:
This Letter describes a projection system with extended depth of field (DOF) and field of view (FOV). In the proposed system, an input image is projected with varying focusing distances and optical axis directions, and the projected images are superposed on a three-dimensional screen to realize a three-dimensionally space-invariant point spread function (PSF). A target image is deconvolved, and the result is used as the input image before projection by using the superposed PSF to generate a sharp output image on the screen. This concept for extended-DOF and -FOV projection was demonstrated experimentally.
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