Measurement Of Mountain Background Materials By Visible-near Infrared Reflectance Spectroscopy And Camouflage Effect Evaluation Of Camouflage Clothes

With the development of reconnaissance and camouflage technology,camouflage performance of camouflage clothing can not be limited to visible light.Camouflage clothing for near infrared camouflage has been developed one after another,among which Woodland Camouflage Clothing is more mature.Appropriate visible-near infrared camouflage effect evaluation method can effectively guide us to better develop and optimize camouflage clothing.At present,there are few reports on the visible-near infrared camouflage effect evaluation method of camouflage clothing.This paper takes this as a starting point to do some supplementary work.Taking mountainous area as background,the sampling method is determined firstly,then the visible-near infrared reflectance spectra of mountainous background materials are sampled,sampled and tested,and the spectral rules of materials are described.The samples and wavelengths are systematically clustered by cluster analysis,focusing on the classification of bands combined with the characteristics of reflectance spectra.This section determines the reasonable spectral range to evaluate the camouflage garment's visible near infrared camouflage effect.The aim is to explore a feasible camouflage garment visible light and near infrared camouflage effect evaluation process and method.Mountain background materials mainly include vegetation,soil and rock,which correspond to three types of patches on camouflage clothes.Experiments show that the visible-near infrared reflectance spectra of plant leaves are similar.In the visible region,corresponding "color peaks" are formed in their color bands;in the "near infrared plateau" affected by many factors,the reflectance will only be different.The reflectance of plants in near infrared region is generally higher than that of loess,and the reflectance of rocks is wider,but most of them are lower.Cluster analysis showed that season was the most significant factor affecting near infrared reflectance of green vegetation.In summer,the factors affecting near infrared reflectance were herbaceous plants,new leaves and leaves of woody plants,coniferous plants and parallel vein plants.In the visible light range,the spectral curves of soil and rock form gentle peaks in their color bands,and the reflectance in the near infrared region is generally not as high as that of plants.Wavelength clustering analysis can effectively obtain the distribution of spectral characteristics in specific bands,which provides a basis for evaluating camouflage effect of camouflage clothing.The spectral curves of green vegetation,loess and rock vary in different degrees of dispersion.Based on the clustering analysis results and spectral characteristics,the spectral range of camouflage effect of camouflage clothing was evaluated,and the camouflage clothing was evaluated.