正交子空间投影法用于下垫面分类的卫星优化通道选择
Optimal channels selection for underlying surface classification using orthogonal subspace projection algorithm
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摘要: 在研究正交子空间投影算法基础上，将此算法用于卫星影像下垫面分类的优化通道选择。通过分析目标谱分布，并运用MODTRAN模拟计算背景程辐射和整层大气透过率，得到对应不同目标的权函数。根据权函数谱分布以及最佳指数函数(OIF)并结合卫星通道用途，最终得到用于下垫面分类的卫星优化通道选择结果。通过对选择的通道进行合成，发现此算法用于下垫面分类具有较好的效果。Abstract: Based on orthogonal subspace projection algorithm, the algorithm was used to satellite optimum channels selection for underlying surface classification. The weight functions were obtained by analyzing target spectra distribution and background radiance, transmittance computed by MODTRAN. Satellite optimum bands for underlying surface classification were selected by using weight function spectra distribution, optimum index function and the usages channels of MODIS. Channels composing result shows that the algorithm is effective for underlying surface classification.
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