Dr. Haibo Wang Profile

Dr. Haibo Wang

at Northwest Institute of Eco-Environmental Resources, CAS

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Proceedings Article | 18 September 2009 Paper

The spectral characteristics of Stellera chamaejasme L. with varied coverage in Qilian of China

Haibo Wang, Jinbo Qian, Mingguo Ma, Xufeng Wang

Proceedings Volume 7472, 74721U (2009) https://doi.org/10.1117/12.830346

KEYWORDS: Reflectivity, Visible radiation, Remote sensing, Vegetation, Ecosystems, Hyperspectral imaging, Sensors, Absorption, Infrared radiation, Spectrometers

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Stellera chamaejasme L.(Stellera) is a poisonous weed that widely distributed in grassland ecosystems of Western China. Field reflectance measurements were performed for the Stellera with varied coverage in Qilian county of China. The spectral characteristics of some main species were analyzed. The result indicated that the reflectance of the corolla of Stellera was greater than that of other species over the full range of wavelengths. The best time to distinguish Stellera is the full bloom period of the Stellera. Three groups of spectral measurements were performed for the Stellera with varied coverage. The first experiment indicated that the reflectance increased with the increased densities in near-infrared wavelengths, but no obvious regular pattern existed in visible bands. On the contrary, in the full bloom period of the Stellera, there is an obviously increasing trend of reflectance both in visible and near-infrared bands with the increased densities. No distinct trend was found in the third experiment that conducted after the full bloom period. A clear linear relationship exited in analyzing the correlation between Stellera with varied density and their spectral characteristics. Thus, the density of Stellera could be quantitatively estimated based on the spectral characteristics from hyperspectral remote sensing images.

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