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测绘学报  2015 

一种具有仿射不变性的倾斜影像快速匹配方法

DOI: 10.11947/j.AGCS.2015.20140048, PP. 414-421

Keywords: 倾斜影像匹配,仿射不变特征(AIF),ASIFT,逆仿射变换,匹配约束

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Abstract:

提出了一种较为快速且具有仿射不变性的倾斜影像匹配方法.通过估算影像的相机轴定向参数计算出初始仿射矩阵,通过逆仿射变换得到纠正影像,对纠正影像进行SIFT匹配.首先利用比值提纯法(NNDR)、归一化互相关(NCC)测度约束和左右一致性检验得到粗匹配点对,由粗匹配点对利用RANSAC方法计算出基本矩阵F和单应矩阵H.匹配时,匹配策略采用最邻近匹配,并利用极线约束、单应矩阵约束、NCC测度约束和主方向差值一致性约束剔除误匹配.通过对三组典型的倾斜影像数据进行试验,试验表明该方法匹配准确率高,匹配点对较为密集、均匀,且效率较高.

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