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The aim of our research was to prove that a digital camera does not influence the quality of spectral reflectance estimation and that satisfactory results could be achieved with a low-cost camera instead of using more expensive and complex multispectral devices. For that purpose two digital cameras - Nikon D300 in Nikon D700 were compared by obtaining spectral data from RGB values of a digital camera. For calculation of spectral data two different methods were used - SpecSens method and ImaiBerns method. In the research, two different color charts - ColorChecker DC and ColorChecker SG, were used. Performance of each camera and reflectance estimation approach were evaluated based on RMSE and ΔE*ab. Results showed that in the case of the ImaiBerns method it could be concluded that the obtained reflectance spectra are independent from the used camera, as somewhat slightly better results were obtained with Nikon D700. In the case of SpecSens method, which is based on the determination of the spectral sensitivity of the camera, the choice of the camera had quite an impact on the results. These results are pretty unreliable due to the large color differences ΔE*ab, as this calculation takes into account the standard light (first if you want to calculate XYZ and second the LAB values) and standard colorimetric observer.

Comparison of Two Digital Cameras based on Spectral Data Estimation Obtained with Two Methods