Pseudorandom phase masks for superresolution imaging from subpixel shifting

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We present a method for overcoming the pixel-limited resolution of digital imagers. Our method combines optical point-spread function engineering with subpixel image shifting. We place an optimized pseudorandom phase mask in the aperture stop of a conventional imager and demonstrate the improved performance that can be achieved by combining multiple subpixel shifted images. Simulation results show that the pseudorandom phase-enhanced lens (PRFEL) imager achieves as much as 50% resolution improvement over a conventional multiframe imager. The PRPEL imager also enhances reconstruction root-mean-squared error by as much as 20%. We present experimental results that validate the predicted PRPEL imager performance.

Original languageEnglish (US)
Pages (from-to)2256-2268
Number of pages13
JournalApplied Optics
Volume46
Issue number12
DOIs
StatePublished - Apr 20 2007

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Image sensors
Masks
masks
Imaging techniques
point spread functions
apertures
pixels
lenses
engineering
optics
simulation
Optical transfer function
Lenses
Pixels

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Pseudorandom phase masks for superresolution imaging from subpixel shifting. / Ashok, Amit; Neifeld, Mark A.

In: Applied Optics, Vol. 46, No. 12, 20.04.2007, p. 2256-2268.

Research output: Contribution to journalArticle

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