The basic research on evaluation and prediction of the plant vitality by the degree of spectral polarlization characteristics

1.利用NDVI进行光谱反射率测量和植被评价：对NDVI产生的原因——红边的性能进行评价，在进行连续光谱测量时，将波长作为变量，并进行微分。在该谱差中，在0.5μm附近有一个峰值，发现该峰值在相同应力下的变化比红边的变化更敏感，可以有效地定义该波长下的新NDVI。利用光谱偏振度特征评价植被状况与NDVI的关系：比较了NDVI和光谱衍射偏振光度对植物（白菜）所受胁迫的测量灵敏度。首先通过因子分析选择663、1450nm。光谱衍射偏振光特征度与NDVI在这两个波长的检测对比结果如下：在NDVI第10个波长，光谱衍射偏振光第19个波长，光谱衍射偏振光第663nm，光谱衍射偏振光第1450nm，在NDVI第7个波长后的应力检测变化得到证实。光谱偏振度在成像系统中的应用及植被活力评价。：利用市场CCD相机的一套带通滤光片和偏振光片，观察光谱衍射偏振光的成像程度。以大白菜和洋地黄为研究对象，测量了图像的光谱偏振光度，并与常规彩色图像进行了比较。偏振度图像与时间行为的相关系数对植物是捕捉胁迫的，也就是说，在彩色图像中无法得到证实。

1.Spectral reflectance measurement and vegetation evaluation by NDVI : The performance of the red edge which was a reason of NDVI should be evaluated, and the wavelength was made to be a variable in respect of the continuation optical spectrum measurement, and the differential was done. In this spectrum differential, there was a peak value near 0.5μm, and it was found that the change of this peak value for the same stress was more supersensitive than it in the red edge and that it is effective of the definition of new NDVI at this wave-length.2.The relationship between evaluation and NDVI of the vegetation condition by the characteristic degree of the spectral polarization : The measurement sensitivity of NDVI and degree of the spectral diffraction polarized light for the stress to the plant (cabbage) was compared. At first, 663,1450nm are chosen by the factor analysis. The result of the detection comparison of characteristic degree of spectral diffraction polarized light and NDVI consists like the following at this two wavelengths : In NDVI in 10th, degree of 663nm spectral diffraction polarized light in 19th and degree of 1450nm spectral diffraction polarized light in NDVI, the change was confirmed the detection of the stress after seventh.3.The application to imaging systems of the degree of spectral polarization and the vegetation vitality evaluation. : The image degree of the spectral diffraction polarized light was observed by the set of band-pass filter and polarized filter in the CCD camera of the marketing. The stress is given to cabbage and digitalis, the image of the degree of spectral polarized light is measured, and it compared color image usual one. Correlation coefficient of the degree of polarization image and the temporal behavior were catching stresses to the plant which that is to say, it could not be confirmed in the color image.