| 荒漠林高光谱与光学影像植被指数(VI)的比较 |
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| 引用本文： | 武文丽,袁也,李园园,楚光明,张昊.荒漠林高光谱与光学影像植被指数(VI)的比较[J].新疆农业科学,2020,57(1):149-156. |
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| 作者姓名： | 武文丽 袁也 李园园 楚光明 张昊 |
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| 作者单位： | 石河子大学农学院林学系,新疆石河子 832003 |
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| 基金项目： | 国家自然科学基金“古尔班通古特沙漠梭梭构型变化及其与环境的关系”(3166096) |
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| 摘 要： | 【目的】利用地面遥感和航天遥感数据结合植被指数实现快速调查,研究各数据中植被指数的差异。【方法】用地面高光谱数据和光学影像中分别对梭梭林和柽柳林进行归一化植被指数(NDVI)、重归一化植被指数(RDVI)和土壤调节植被指数(SAVI)3种植被指数的提取,并进行比较。【结果】在高光谱VI中,梭梭林和柽柳林的3种VI的数值大小和变化趋势都很接近,特别是SAVI和RDVI,但NDVI的变化较其他2种大;而在光学影像VI中,梭梭林和柽柳林的NDVI和SAVI的数值基本保持在一定范围内,且变化幅度微小,而RDVI的数值和变化趋势均较大,相对不稳定。【结论】高光谱数据所提取的NDVI和SAVI均大于光学影像,而光学影像所提取的RDVI均大于高光谱数据,RDVI对植被覆盖度更敏感。
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| 关 键 词： | 荒漠林 高光谱 光学影像 植被指数(VI) |
| 收稿时间： | 2019-06-25 |
Comparison of Hyperspectral and Optical Image Vegetation Index (VI) in Desert Forest |
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| WU Wenli,YUAN Ye,LI Yuanyuan,CHU Guangming,ZHANG Hao.Comparison of Hyperspectral and Optical Image Vegetation Index (VI) in Desert Forest[J].Xinjiang Agricultural Sciences,2020,57(1):149-156. |
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| Authors: | WU Wenli YUAN Ye LI Yuanyuan CHU Guangming ZHANG Hao |
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| Institution: | Department of Forestry, Agricultural College, Shihezi University, Shihezi Xinjiang 832003, China |
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| Abstract: | 【Objective】 For the sparse distribution of Haloxylon ammodendron and Tamarix ramosissima in arid and semi-arid regions, it is difficult to carry out ground survey in large-scale. The combination of ground remote sensing and space remote sensing with vegetation index (VI) can survey them rapidly, but in this process, it is necessary to clarify the difference of vegetation index in data.【Method】 NDVI, RDVI and SAVI of H. ammodendron and Tamarix ramosissima. were studied and compared by using hyperspectral data and optical image in desert forest.【Result】 The results showed that the values and trends of the three kinds VI of H. ammodendron and Tamarix ramosissima were similar, especially SAVI and RDVI, but the change of NDVI was larger than that of the other twos. In the optical image VI, the NDVI and SAVI of H. ammodendron and Tamarix ramosissima were kept in a certain range, and the variation range was small, while the values and trends of RDVI were relatively large and unstable.【Conclusion】 The NDVI and SAVI extracted from the hyperspectral data were larger than those of the optical images, while the RDVI extracted from the optical images was larger than the hyperspectral data,therefore, RDVI was more sensitive to vegetation coverage. |
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| Keywords: | desert forest hyperspectral data optical image vegetation index (VI) |
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