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Improved Threat Identification Using Tonemapping of High-Dynamic-Range X-ray Images.

Jack L Glover1,2, Lawrence T Hudson2, Nicholas G Paulter2

  • 1Theiss Research, 7411 Eads Ave., La Jolla, CA 92037, USA.

Journal of Testing and Evaluation
|May 17, 2019
PubMed
Summary
This summary is machine-generated.

Modern tonemapping algorithms significantly enhance the display of high-dynamic-range X-ray images on standard low-dynamic-range screens. This technology improves the visualization of security scans for better threat detection.

Keywords:
bomb squadsexplosiveshigh-dynamic-rangeimage enhancementportable X-ray imagingsecurity X-ray imagingtonemapping

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Area of Science:

  • Medical Imaging
  • Computer Vision
  • Display Technology

Background:

  • Transmission X-ray systems are crucial for security screening of packages, luggage, and cargo.
  • X-ray images possess a high dynamic range (≥1,000:1), exceeding the capabilities of typical consumer displays (<255:1).
  • This mismatch limits the effective visualization and interpretation of critical details in security imaging.

Purpose of the Study:

  • To evaluate the efficacy of modern tonemapping algorithms in improving X-ray image display.
  • To compare the performance of various popular tonemapping algorithms for this specific application.
  • To bridge the gap between high-dynamic-range X-ray data and low-dynamic-range display limitations.

Main Methods:

  • Implementation and testing of several contemporary tonemapping algorithms.
  • Application of these algorithms to high-dynamic-range X-ray images.
  • Subjective and objective assessment of image quality on low-dynamic-range displays.

Main Results:

  • Tonemapping algorithms demonstrably improve the visibility of details in X-ray images on standard displays.
  • Significant differences in performance were observed among the evaluated tonemapping algorithms.
  • Enhanced contrast and detail rendition were noted across tested algorithms.

Conclusions:

  • Modern tonemapping is a viable and effective solution for displaying high-dynamic-range X-ray imagery on consumer-grade screens.
  • Algorithm selection can impact the quality of visualization, suggesting a need for tailored approaches.
  • This advancement holds potential for improving security screening effectiveness through better image interpretation.