Estimation of Rice Yield per hector sing Satellite Remotely Sensed Imagery with the Consideration of Spectral Reflectance Mechanisms from Rice Canopy

本研究的结论可以概括为以下几点。1)提出了一种水稻立体图像的匹配方法。2)利用该匹配方法了解了水稻结构指数的时空特征。3)由于水稻单叶光谱反射率和透射率的变化特征，在近红外波段，反射率和透射率因子的变化较小。4)提出了一种基于真实水稻冠层结构的辐射传输模拟方法。计算的水稻冠层双向反射率与实测值拟合较好。5)在一定视角和单叶光谱特性条件下进行了水稻冠层双向模拟，分析了结构指数与反射率特性之间的关系。6)在试验田种植了14个水稻品种，测量了3个水稻品种冠层的三维结构和光谱反射率。

Conclsions of this research can be smmarized as the followings.1) A matchig method for rice stereo images is developed.2) Temporal and spatial characterristics of rice structural indices are understood with this matching method.3) As a result of variation characteristics of spectral reflectance and transmittance of rice individual leaves, in NIR variation of reflectance and transmittance factor is small.4) A radiative transfer simulation method based on realistic rice canopy structure is proposed. Calculated Bidirectional reflectance of rice canopy is fitted the measured one well.5) Rice canopy bidirectional simlations are carried out under some view and individual leaf spectral characteristic conditions and relation between structural lndices and reflectance characteristics are analyzed.6) Forteen kinds of rice varieties were grown in the experimental field and thire 3-D structure and spectral reflectance from thier canopy were measured.