Effective models for correlating spectral reflectance between spectrophotometers

This paper describes different models to achieve satisfactory interinstrument agreement between spectrophometers. The models investigated include the Berns and Petersen method, the modified Berns and Petersen method, the Reniff method, the Rich and Martin method and the R‐model developed by Chung et al. In the paper, the Reniff method and the R‐model were extended, and all the models were then evaluated using sample sets with different substrates. It was found that the extended Reniff method gave the best training performance and the worst testing performance. The Rich and Martin model, the three‐term Chung model and the Berns and Petersen models, all with wavelength‐dependent coefficients, gave better testing performance.