Grayscale resolution of LCD displays: 8 bits vs 11 bits

Hans Roehrig, Jiahua Fan, Elizabeth A. Krupinski, Kunal Gandhi

Research output: Contribution to journalConference articlepeer-review


This paper presents a few results of an initial study to compare softcopy displays with 8 bits contrast resolution with those of 11 bits contrast resolution. Particular interest was paid to failure to detect subtle objects and appearance of artifacts like false contours as a result of improper quantization. Objects like squares, discs and Gaussian nodules were simulated at different amplitudes on uniform backgrounds. Another approach was to place simple objects like disks and Gaussian objects into a clinical image. The study concluded that indeed subtle objects can be missed and artifacts such as false contours can occur, dependent on signal amplitude and noise. A comprehensive observer study is under development to confirm and refine these results.

Original languageEnglish (US)
Article number59230M
Pages (from-to)1-9
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2005
EventPenetrating Radiation Systems and Applications VII - San Diego, CA, United States
Duration: Aug 1 2005Aug 4 2005


  • Digitization
  • Human perception
  • Quantization error

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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