Autofocus for a multiscale gigapixel camera

Tomoya Nakamura, David S. Kittle, Seo Ho Youn, Steven D. Feller, Jun Tanida, David J. Brady

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

In recent studies, the advanced wide field of view architectures for image reconstruction and exploitation (AWARE) multiscale camera, which is composed of a monocentric objective lens and an array of microcameras, was developed for the realization of snapshot wide field of view and high resolution imaging. This paper describes accelerated autofocus (AF) methods for the AWARE system based on a hierarchical spatial algorithm and an iterative temporal algorithm. In the algorithms, sensor positions of each microcamera are hierarchically scanned with contrast detection to effectively search for a focusing distance. The positions are then updated iteratively for dynamic scenes using temporal information. The algorithms are theoretically analyzed and experimentally demonstrated. The developed AF methods can be used for the realization of the temporal gigapixel imaging by the AWARE system.

Original languageEnglish (US)
Pages (from-to)8146-8153
Number of pages8
JournalApplied optics
Volume52
Issue number33
DOIs
StatePublished - Nov 20 2013
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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