Dental Materials
Volume 22, Issue 6 , Pages 553-559, June 2006

Color accuracy of commercial digital cameras for use in dentistry

  • Alvin G. Wee

      Affiliations

    • Section of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Postle Hall, 305 West 12th Avenue, P.O. Box 182357, Columbus, OH 43210-1241, USA
    • Corresponding Author InformationCorresponding author. Tel.: +1 614 292 0785; fax: +1 614 292 9422.
    • ,
  • Delwin T. Lindsey

      Affiliations

    • Department of Psychology, The Ohio State University, Columbus, OH, USA
    • ,
  • Shanglun Kuo

      Affiliations

    • Section of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Postle Hall, 305 West 12th Avenue, P.O. Box 182357, Columbus, OH 43210-1241, USA
    • ,
  • William M. Johnston

      Affiliations

    • Section of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Postle Hall, 305 West 12th Avenue, P.O. Box 182357, Columbus, OH 43210-1241, USA

Received 23 September 2004; received in revised form 16 March 2005; accepted 12 May 2005.

Summary 

Objectives

The use of calibrated, commercial digital cameras for dental applications is promising. The color accuracy of various calibration models were evaluated as applied to three commercial digital cameras for use in dental color matching.

Methods

CIE LAB values of 264 color patches and 65 shade tabs were measured with a spectroradiometer. Digital images of the samples were taken with the Nikon D100, Canon D60 and Sigma SD9 cameras. Four regression models were formulated from the color patch CIE LAB and the digital image values. Shade tab CIE LAB colors were predicted by applying the digital image values into the calibration models and were compared to the measured CIE LAB values. The Wilcoxon Rank-Sum test determined if the 12 camera/calibration models differed significantly from the color measurement setup.

Results

Every camera/calibration model (ΔE's ranging from 1.79 to 5.25) showed a statistically significant difference from the color measurement setup.

Significance

Commercial SLR digital cameras when combined with the appropriate calibration protocols showed potential for use in the color replication process of clinical dentistry.

Keywords: Digital cameras, Calibration models, Color measurement, Translucent material

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PII: S0109-5641(05)00229-0

doi:10.1016/j.dental.2005.05.011

Dental Materials
Volume 22, Issue 6 , Pages 553-559, June 2006

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