Measurement of luminance noise and chromaticity noise of LCDs with a colorimeter and a color camera

H. Roehrig, W. J. Dallas, E. A. Krupinski, Gary R. Redford

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


This communication focuses on physical evaluation of image quality of displays for applications in medical imaging. In particular we were interested in luminance noise as well as chromaticity noise of LCDs. Luminance noise has been encountered in the study of monochrome LCDs for some time, but chromaticity noise is a new type of noise which has been encountered first when monochrome and color LCDs were compared in an ROC study. In this present study one color and one monochrome 3 M-pixel LCDs were studied. Both were DICOM calibrated with equal dynamic range. We used a Konica Minolta Chroma Meter CS-200 as well as a Foveon color camera to estimate luminance and chrominance variations of the displays. We also used a simulation experiment to estimate luminance noise. The measurements with the colorimeter were consistent. The measurements with the Foveon color camera were very preliminary as color cameras had never been used for image quality measurements. However they were extremely promising. The measurements with the colorimeter and the simulation results showed that the luminance and chromaticity noise of the color LCD were larger than that of the monochrome LCD. Under the condition that an adequate calibration method and image QA/QC program for color displays are available, we expect color LCDs may be ready for radiology in very near future.

Original languageEnglish (US)
Title of host publicationPenetrating Radiation Systems and Applications VIII
StatePublished - 2007
EventPenetrating Radiation Systems and Applications VIII - San Diego, CA, United States
Duration: Aug 29 2007Aug 30 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherPenetrating Radiation Systems and Applications VIII
Country/TerritoryUnited States
CitySan Diego, CA


  • Chrominance noise
  • Color LCD
  • Foveon color camera
  • Luminance noise
  • Medical display
  • Monochrome LCD

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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