Color accuracy of commercial digital cameras for use in dentistry.
OBJECTIVE
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 (DeltaE's ranging from 1.79 to 5.25) showed a statistically significant difference from the color measurement setup.


CONCLUSIONS
Commercial SLR digital cameras when combined with the appropriate calibration protocols showed potential for use in the color replication process of clinical dentistry.
Wee
Alvin G
AG
Section of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Postle Hall, 305 West 12th Avenue, P.O. Box 182357, Columbus, 43210-1241, USA. wee.12@osu.edu
Lindsey
Delwin T
DT
Kuo
Shanglun
S
Johnston
William M
WM
D002138:Calibration; D003116:Color; D004867:Equipment Design; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D023861:Photography, Dental / Q000295:instrumentation*; D011874:Radiometry / Q000295:instrumentation