The healthy and withered situation of vegetation has important influence on its biological and chemical process. Neither single wavelength LiDAR (light detection and ranging) nor spectral image can capture the spatial and spectral information of vegetation simultaneously. However, the invention of multispectral LiDAR provided the new method for vegetation detection. There have been some researches on vegetation detection based on multispectral LiDAR, but the potential of multispectral LiDAR’s capability of recognition of healthy and withered vegetation leaves is not totally revealed. So, this research, based on multispectral LiDAR, classified the healthy and withered scindapsus leaves with SVM (support vector machine). And then we also compared the classification capability between the vegetation index and spectral reflectance. The results showed that, the multispectral LiDAR can classify the healthy and withered scindapsus leaves effectively: overall classification accuracy is 95.556%. Compared with spectral reflectance, vegetation index could help increase the classification accuracy: the producer accuracy of withered leaves increased from 23.272% to 70.507%.
In this paper a new technique of objects measurement based on multi-wavelength lidar system has been proposed and developed to make horizontal-path laser measurements of objects. The two or more wavelengths laser transmitter operates within and adjacent to the sensitive bands exhibited by the characteristics of each object, the result could be used to establish inversion models of the laser transmitting backscatter signals. The application value and the key techniques of the spectral lidar are analyzed. The lidar wavelength selection method is studied and a hyperspectral experiment had
been down to testify the feasibility of the theory. Also issues to approach the final goal of this new technique are discussed.
In this paper a new technique of objects measurement based on multi-wavelength lidar system has been proposed and
developed to make horizontal-path laser measurements of objects. The two or more wavelengths laser transmitter
operates within and adjacent to the sensitive bands exhibited by the characteristics of each object, the result could be
used to establish inversion models of the laser transmitting backscatter signals. The application value and the key
techniques of the spectral lidar are analyzed. The lidar wavelength selection method is studied and a hyperspectral
experiment had been down to testify the feasibility of the theory and the lidar detection is simulated. Also issues to
approach the final goal of this new technique are discussed.
Aerosol particles play important role in both global climate system and earth observation application. We have
developed a portable scanning Mie lidar, with the combination of spectrograph, active and passive earth observation
satellite data, and the ground sensor data, severe weather research and earth observation atmospheric correction work
could be conducted. To obtain more accurate aerosol information, we are developing a new multi-channel Raman lidar
system. Also we have developed a simulation model for system performance simulation and data simulation. In this
paper, the lidar system development, simulation modeling, and primary experimental work result will be described.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.