A Study of Model for Calculating Mid-Infrared Reflectance of Vegetation
HE Li-qin1, 2, JING Xin2, YAN Lei2, ZHONG Yi-gen1, XIAO Zhi-feng1, ZENG Fan-gang3*
1. Pingxiang Institute Co., Ltd., of Planning, Survey and Design, Pingxiang 337000, China
2. Beijing Key Lab of Spatial Information Integration and 3S Application, Peking University, Beijing 100871, China
3. School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, China
Abstract：Mid-infrared reflectance has significant application value for vegetation. However, due to the coupling of the emitted energy from land objects and the reflected energy from the sun in the mid-infrared band, it is challenging to determine the reflectance of land objects in this band. This article presents a model for calculating mid-infrared reflectance in vegetation, and the sensitivity analysis demonstrates that the model exhibits strong reliability. This study employed this model to calculate the mid-infrared reflectance of vegetation at multiple research sites. The values obtained were consistent with reality and showed a certain negative correlation with NDVI. A new vegetation index was established using the near-infrared reflectance and mid-infrared reflectance obtained from this model, rather than the infrared reflectance. The results showed that this new vegetation index can represent vegetation coverage and has the advantage of being insensitive to aerosols.
Key words：Mid-infrared; Calculation model; New vegetation index
贺丽琴，景 欣，晏 磊，钟宜根，肖智峰，曾凡刚. 一种计算植被中红外反射率的模型研究[J]. 光谱学与光谱分析, 2025, 45(06): 1622-1628.
HE Li-qin, JING Xin, YAN Lei, ZHONG Yi-gen, XIAO Zhi-feng, ZENG Fan-gang. A Study of Model for Calculating Mid-Infrared Reflectance of Vegetation. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2025, 45(06): 1622-1628.
