Studys On The Polarized Reflectance Characteristics Of Agricultural Thin Membrane

When getting the three-dimensional spectrum characteristics information of an object in 2Ï€space, two approaches have been used to characterize the angle spectrum. The first one emphasizes on applications only. It assumes that a ground target is a Lambert object and ignores the angle differences. The other approach emphasizes the verity and difference of angle information. The Bidirectional Reflection Distributing Function (BRDF) has been used in information extraction. In the process of reflecting, scattering and transmitting electromagnetic wave, earth targets can represent polarized characteristics, which relate to their nature. Polarization includes more contents in describing dark targets (or low irradiance) and man-made targets, and can be another dimension of information source in remote sensing. The traditional remote sensing mainly detects the earth surface vertically to obtain its planar information, but it is difficult to get enough parameters for the quantitative remote sensing to invert earth targets. The multi-angle observation can get more detailed and reliable three-dimensional space structure parameters of targets, so that it is possible to realize the quantitative remote sensing. Therefore, the multi-angle polarized information detection of object has become a new method of quantitative remote sensing.Along with the improving of our country's agricultural producing level, the usage of agricultural thin membrane is increasing year by year."Thin Membrane Agriculture"has developed to be a necessary and important industry of citizen living gradually. How to ascertain the information of agricultural thin membrane has become a problem that needs to resolve urgently. Using multi-angle polarized reflectance remote sensing to observe the polarized reflectance characteristics of agricultural thin membrane is a new trying to obtain the information of agricultural thin membrane. This text carried on the polarized reflectance characteristics survey of the common kinds of agricultural thin membrane in our country's northern-part, and analysis the polarized reflectance characteristics of them in 2Ï€space by processing and studying the experimental data, then provided academic basis for the application of polarized reflectance remote sensing on"Thin Membrane Agriculture". And carried contrast analysis on agricultural thin membrane and water body's polarized reflectance characteristic, discussed how to distinguish agricultural thin membrane from water background at fist step .Further studied the metered relation between polarized reflectance and BRDF of agricultural thin membrane, to carry out the evolving with each other of polarized reflectance and BRDF.