LiDAR & Satellite Incorporated Application(53)
A Studied Case
Advanced Topics Using HyMAP and LiDAR Data(1)
Identifying Pigments in Leaf (1)
Figure 1
Figure 2
Figure 3
Figure 4
Identifying Pigments in Leaf relies on some featured peaks appear within interval of wavelength. Due to that pigments in solution of leaf are affected by other components such as proteins surrounding them. Accordingly, most spectral profile of pure pigment is based on the one extracted from solution using solvent. Such a spectral profile is still affected by solvent. They are useful for us to quickly and seek for and identify pigments in leaf in remote sensing although they are not 100 % correct in practice. The known spectral profiles of pigments are most from lab.
In this case, on the basis of known information of pigment in leaf (see Figure 1), it is easy for us to identify β-Carotene shown in Figure 2 to 4) in terms of the known wavelength classified by bands given in Figure 3. Similarly, chlorophyll-a is also able to be found (see Figure 5 to 6).
In remote sensing, the convenient way to do is following up the order of supplied bands to find out the corresponding wavelength. The radiance and reflectance at ground may be more accurate to find pigments in interval of VIS. It should not be much difficult for us to identify them based on some known knowledge. For some unclear vegetation, firstly they can be identified by using a supplied library to make sure what sort of vegetation; secondly perform this procedure to confirm what a sort pigment existing in the leaf.
