METHOD AND SYSTEM FOR SELECTION OF CALIBRATION MODEL DIMENSIONALITY, AND USE OF SUCH A CALIBRATION MODEL

摘要

Method and system for providing a calibration model comprising a quantitative relation between object measurement data and object property values. The system (10) comprises a sample unit (11), a predictor measurement unit (13), a predictand unit (12), and a data processor unit (14). The data processor unit (14) is arranged for obtaining calibration models, each calibration model having a number of model terms which determines the model dimensionality, and validating the obtained calibration models. The data processor unit (14) further obtains the calibration model by initialising the calibration model, adding an additional model term to increase the dimensionality of the calibration model, calculating a risk of over-fitting by the model associated with the current dimensionality of the model, and repeating the adding of an additional model term and calculating of the risk of over-fitting up to a predetermined dimensionality of the model.