LI Chang-sheng,GAO Shu-hui.Determining the Sequence of Intersecting Lines Based on Vis-NIR Hyperspectral Imaging Technology[J].Journal of Instrumental Analysis,2025,44(05):781-793.
LI Chang-sheng,GAO Shu-hui.Determining the Sequence of Intersecting Lines Based on Vis-NIR Hyperspectral Imaging Technology[J].Journal of Instrumental Analysis,2025,44(05):781-793. DOI: 10.12452/j.fxcsxb.240925415.
Determining the Sequence of Intersecting Lines Based on Vis-NIR Hyperspectral Imaging Technology
In the field of forensic questioned document examination,the analysis of the ink of the text and the seal imprint formation time sequence is the key technology to verify the authenticity of the instrument material evidence. This paper proposes a sequence of intersecting lines identification model that combines visible-near infrared hyperspectral imaging(Vis-NIR HSI) and convolutional neural networks(CNN). A dataset of hyperspectral data from 42 000 different red-black ink sequence samples was collected.The samples were preprocessed using median filtering(MF),Savitzky-Golay smoothing(SG smoothing),multiplicative scatter correction(MSC),and normalization methods. Further,the successive projection algorithm(SPA) and competitive adaptive reweighted sampling(CARS) were employed for spectral feature wavelength selection. Several binary classification machine learning models,including logistic regression(LR),and a one-dimensional convolutional neural network(1D-CNN) model were developed and their modeling effects compared. The results showed that the CARS-1D-CNN model,established using feature wavelengths extracted by the CARS method,achieved the best classification performance with accuracies of 96.98% on the training set and 95.54% on the test set. The study demonstrates that the combination of Vis-NIR HSI and 1D-CNN can effectively identify the sequence of intersecting lines. This method,in conjunction with conventional examination techniques,can further enhance the accuracy and efficiency of forensic questioned document examination.
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