Deep-Learning-Based Active Hyperspectral Imaging Classification Method Illuminated by the Supercontinuum Laser

• Published in: Applied sciences Vol. 10; no. 9; p. 3088
• Main Authors: Liu, Yu, Tao, Zilong, Zhang, Jun, Hao, Hao, Peng, Yuanxi, Hou, Jing, Jiang, Tian
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-05-2020
• Subjects: active hyperspectral imaging; Biomedical materials; Camouflage; Classification; Datasets; Deep learning; Equipment and supplies; Hyperspectral imaging; I.R. radiation; Imaging; Infrared lasers; Laboratories; Lasers; Libraries; Light; Mapping; Methods; Spatial data; Spectra; supercontinuum laser; China
• ISSN: 2076-3417; 2076-3417
• DOI: 10.3390/app10093088

Hyperspectral imaging (HSI) technology is able to provide fine spectral and spatial information of objects. It has the ability to discriminate materials and thereby has been used in a wide range of areas. However, traditional HSI strongly depends on the sunlight and hence is restricted to daytime. In this paper, a visible/near-infrared active HSI classification method illuminated by a visible/near-infrared supercontinuum laser is developed for spectra detection and objects imaging in the dark. Besides, a deep-learning-based classifier, hybrid DenseNet, is created to learn the feature representations of spectral and spatial information parallelly from active HSI data and is used for the active HSI classification. By applying the method to a selection of objects in the dark successfully, we demonstrate that with the active HSI classification method, it is possible to detect objects of interest in practical applications. Correct active HSI classification of different objects further supports the viability of the method for camouflage detection, biomedical alteration detection, cave painting mapping and so on.