Chemometric model selection by image analysis

A method of obtaining chemical composition information of at least one sample by spectroscopic measurement, the method comprising:

• i. acquiring spectroscopic data of the sample by using at least one spectrometer device, within at least one spatial measurement range of the spectrometer device;
• ii. acquiring, by using at least one imaging device, image data of a scene within a field of view of the imaging device, the scene comprising at least a part of the sample and at least a part of the spatial measurement range of the spectrometer device, and analyzing the image data and/or the spectroscopic data thereby determining at least one item of identification information on the sample by using at least one processing device, wherein the image data comprises information about a mixing ratio;
• and
• iii. evaluating the spectroscopic data for obtaining at least one item of sample information by using the processing device, wherein the evaluating comprises processing the spectroscopic data with at least one chemometric model, wherein the chemometric model translates the spectroscopic data into chemical composition information, wherein the chemometric model is selected in accordance with the item of identification information, wherein, in case of mixtures, the chemometric model for each component is selected, wherein the mixing ratio is used for determining the item of sample information for the mixture
• by aggregating the chemometric models depending on the mixing ratio, wherein the aggregating comprises adding and weighing according to the mixing ratio, and/or
• as input parameter for at least one forward model.