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Diffusion coded photography for extended depth of field

Published: 26 July 2010 Publication History

Abstract

In recent years, several cameras have been introduced which extend depth of field (DOF) by producing a depth-invariant point spread function (PSF). These cameras extend DOF by deblurring a captured image with a single spatially-invariant PSF. For these cameras, the quality of recovered images depends both on the magnitude of the PSF spectrum (MTF) of the camera, and the similarity between PSFs at different depths. While researchers have compared the MTFs of different extended DOF cameras, relatively little attention has been paid to evaluating their depth invariances. In this paper, we compare the depth invariance of several cameras, and introduce a new camera that improves in this regard over existing designs, while still maintaining a good MTF.
Our technique utilizes a novel optical element placed in the pupil plane of an imaging system. Whereas previous approaches use optical elements characterized by their amplitude or phase profile, our approach utilizes one whose behavior is characterized by its scattering properties. Such an element is commonly referred to as an optical diffuser, and thus we refer to our new approach as diffusion coding. We show that diffusion coding can be analyzed in a simple and intuitive way by modeling the effect of a diffuser as a kernel in light field space. We provide detailed analysis of diffusion coded cameras and show results from an implementation using a custom designed diffuser.

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      cover image ACM Transactions on Graphics
      ACM Transactions on Graphics  Volume 29, Issue 4
      July 2010
      942 pages
      ISSN:0730-0301
      EISSN:1557-7368
      DOI:10.1145/1778765
      Issue’s Table of Contents
      Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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      Publication History

      Published: 26 July 2010
      Published in TOG Volume 29, Issue 4

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      Author Tags

      1. computational photography
      2. extended depth of field

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      • (2022)Learned NIR&VISCAM: multi-spectral fusion for large depth-of-field computational imagingOptical Design and Testing XII10.1117/12.2642517(19)Online publication date: 21-Dec-2022
      • (2022)Deep fusion prior for plenoptic super-resolution all-in-focus imagingOptical Engineering10.1117/1.OE.61.12.12310361:12Online publication date: 1-Dec-2022
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      • (2021)EDoF-ToF: extended depth of field time-of-flight imagingOptics Express10.1364/OE.44151529:23(38540)Online publication date: 3-Nov-2021
      • (2021)Learning Wavefront Coding for Extended Depth of Field ImagingIEEE Transactions on Image Processing10.1109/TIP.2021.306016630(3307-3320)Online publication date: 2021
      • (2020) Choice of Jacobi–Fourier phase masks for wavefront coding under different f -number Japanese Journal of Applied Physics10.35848/1347-4065/ab965259:SO(SOOD04)Online publication date: 15-Jun-2020
      • (2020)Motion deblurring using spatiotemporal phase aperture codingOptica10.1364/OPTICA.3995337:10(1332)Online publication date: 5-Oct-2020
      • (2020)Diffuser-based computational imaging funduscopeOptics Express10.1364/OE.39511228:13(19641)Online publication date: 19-Jun-2020
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