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A lot of spectral indices were developed based on the relationship between the spectral reflectance of the upper leaf surface and chlorophyll content. But the lower leaf surface may influence reflectance spectra because of canopy structure or the inclination of leaves. The results of this study showed that structural differences of the two leaf sides may result in differences in reflectance and spectral...
Many hyperspectral vegetation indices can be used to estimate the biochemical contents such as pigment content, nondestructively. These reflectance indices are influenced by some leaf surface structure, such as wax, and the existence of the wax affects the performance of the indices on the estimation of the biochemical contents. This research studied the possible effects of the leaf surface wax on...
Cast shadow is a common phenomenon in remote sensing (RS) images. Dark vegetation areas in RS images are apt to be mis-detected in shadow detection. In this paper, an improved shadow detection method was presented base on the spectral feature of shadows. Based on the green component is larger in vegetation areas, construct the mask of vegetation areas. Aim to the complex areas of urban images, detect...
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