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 B erns and P etersen method, the R eniff method, the R ich and M artin method and the R ‐model developed by Chung et al . In the paper, the R eniff 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 R eniff method gave the best training performance and the worst testing performance. The R ich and M artin model, the three‐term C hung model and the B erns and P etersen models, all with wavelength‐dependent coefficients, gave better testing performance.