Infrared sensor performance with boost and restoration filtering

Robert Short, Duke Littlejohn, John Bailey, Ronald Driggers

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The targeting task performance (TTP) model for prediction of target identification range suggests that boost filtering with a well-sampled, low-noise long-wave infrared (LWIR) sensor can substantially increase target ID range (by enhancing contrast at high spatial frequencies). We model a notional high-performance LWIR imaging system with a high F-number, deep electron wells, and a small-pitch focal plane array. System analysis performed with the Night Vision Integrated Performance Model (NVIPM) predicts that a range enhancement upwards of 50% is achievable with Wiener restoration applied to imagery from the modeled sensor. Human perception experiments were performed on simulated target imagery, with range through different boost filters (including a Wiener restoration filter) compared to the no-post-filter case. The TTP model was found to significantly overestimate the performance improvement due to boost and restoration filtering. Alternate predictions based on the Johnson criteria were also performed, and these underestimated the impact of boost. We speculate on reasons for the discrepancy and on promising avenues for future research. Sensor parameters, NVIPM predictions, filter parameters, and experimental data are provided.

Original languageEnglish (US)
Pages (from-to)571-579
Number of pages9
JournalApplied optics
Volume60
Issue number3
DOIs
StatePublished - Jan 20 2021
Externally publishedYes

ASJC Scopus subject areas

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

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