Color accuracy of commercial digital cameras for use in dentistry

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 repression 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 (Delta E'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. (C) 2005 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.