Fuzzibility: A New Approach to Modeling Visibility Using Fuzzy Techniques

Issah M. Alhamad, Riad Saraiji

Research output: Contribution to journalArticlepeer-review


Fuzzy techniques are approximations used to model phenomena or decisions for which mathematical precision is impractical or impossible. In this work, we have developed a new approach to modeling visual performance using fuzzy techniques. Fuzzy techniques allow us to include variables that are not included in the current visual performance model. We also introduce the term critical contrast, which we define as the contrast at which a change in the rating of visual performance occurs. The comparison between our fuzzy relative visual performance model and the relative visual performance model shows close agreement for most conditions. A digital tool was also developed and is available for use. This will make the proposed metric simple to use and implement.

Original languageEnglish
Article number4022042
JournalJournal of Architectural Engineering
Issue number1
Publication statusPublished - Mar 1 2023


  • Contrast
  • Fuzzy systems
  • Lighting
  • Night vision
  • Relative visual performance
  • Roadway lighting
  • Visibility

ASJC Scopus subject areas

  • Architecture
  • Civil and Structural Engineering
  • Building and Construction
  • Visual Arts and Performing Arts


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