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

光谱偏振特性度评价与预测植物生命力的基础研究

基本信息

批准号：
13660139
负责人：
INAMURA Minoru
金额：
$ 2.3万
依托单位：
Gunma University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

项目摘要

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.

1.光谱反射率测量和植被评价的NDVI：红边的性能，这是一个原因，NDVI的评价，波长是一个变量的连续光谱测量，并进行了微分。在该光谱差分中，在0.5 μ m附近有一峰值，该峰值的变化对相同的应力变化比红边的变化更敏感，在该波长下定义新的NDVI是有效的。2.利用光谱偏振特征度评价植被状况与NDVI的关系：比较了NDVI和光谱衍射偏振光度对植物（甘蓝）胁迫的测量灵敏度。首先通过因子分析选择了663、1450nm。光谱衍射偏振光特征度与NDVI在这两个波长下的检测比较结果如下：在10日龄NDVI中，663nm光谱衍射偏振光度在19日龄，1450nm光谱衍射偏振光度在NDVI中，光谱偏振度在成像系统中的应用及植被生命力评价。利用市售CCD相机中的带通滤光片和偏振滤光片组，观察光谱衍射偏振光的成像程度。对甘蓝和毛地黄进行了光谱偏振度图像的测量，并与常用的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有一定的捕捉作用，即在彩色图像中不能确定。