Research On Data Processing Methods Of Near Infrared Spectroscopy

With the development of scientific instrumentation,near-infrared spectroscopy was found as a well-established non-invasive technique for the culture heritage.Specifically,this analytical method can be used for the study of organic and inorganic compounds by exploiting characteristic overtones and combination bands namely CH / NH / OH group.In this essay,the objective of the work is to identify methods for the pre-processing and processing of near-infrared spectra collected from artistic samples.Bibliographic research of the data pre-processing methods is necessary.Then,several pre-processing methods(such as standard normal variate transform,Savitzky-Golay smoothing,derivative first)were evaluated and data were submitted to Principal Component Analysis(PCA).Following the consequent,the NIR spectrum has given a satisfactory result(binders,varnish,and environmental natural can be recognized)after treating by using common signal pre-processing methods.The data were pre-processed and processed with MATLAB as an operational tool.