CAJ | 학술논문

针对走向与雷达飞行方向不平行的建筑物（简称为方位建筑物），提出了一种基于物理散射模型的极化SAR影像四分量分解方法。该方法用于区分散射类型易混淆的方位建筑物和植被。本文首先对方位角补偿后的相干矩阵进行相位旋转；然后构造一种修正的体散射模型，该模型包含纯体散射模型和方位二面角散射模型；最后加入两个能量限制条件，有效避免了负能量像素点的出现。实验结果表明，与已有的四分量分解方法相比，提出的分解方法有效解决了方位建筑物被误识别为植被等体散射类型的问题且消除了负能量，有利于从植被中区分方位建筑物。
침대주향여뢰체비행방향불평행적건축물（간칭위방위건축물），제출료일충기우물리산사모형적겁화SAR영상사분량분해방법。해방법용우구분산사류형역혼효적방위건축물화식피。본문수선대방위각보상후적상간구진진행상위선전；연후구조일충수정적체산사모형，해모형포함순체산사모형화방위이면각산사모형；최후가입량개능량한제조건，유효피면료부능량상소점적출현。실험결과표명，여이유적사분량분해방법상비，제출적분해방법유효해결료방위건축물피오식별위식피등체산사류형적문제차소제료부능량，유리우종식피중구분방위건축물。
This paper presents an improvement to a four-component model-based decomposition scheme of polarimetric syn-thetic aperture radar (SAR) images for oriented urban buildings .Techniques to discriminate the ambiguity between oriented build-ings and vegetation are proposed .First ,phase rotation (PR ) of the coherency matrix after orientation angle compensation (OAC ) is derived to minimize the cross-polarization component .Second ,an alternative volume scattering model with a criterion for pure ran-domness scatterers and/or oriented dihedral structures is introduced in the proposed decomposition .Finally ,power constraints are ap-pended to the scheme to prevent negative powers .It is shown that the oriented urban buildings are well distinguished as double bounce objects from vegetation areas compared to those from the existing four component decompositions and the negative powers are eliminated .