王竞雪;张晶;

• 1:辽宁工程技术大学测绘与地理科学学院

摘要(Abstract)：

针对现有固定窗口相关匹配方式难以适用纹理断裂、深度不一、纹理匮乏等近景影像匹配问题,该文提出一种结合局部仿射变换的自适应窗口匹配算法。以ASIFT特征点作为匹配基元:①利用同名三角网局部仿射变换确定匹配搜索区域;②利用Canny边缘点约束确定候选点自适应相关窗口,对应的建立参考点相关窗口;③建立顾及窗口尺寸的灰度差异相似性测度函数,将小于阈值的最小函数值对应的候选点作为匹配同名点;④采用RANSAC方法对匹配结果进行检核剔除错误匹配。选择3组典型特征的近景影像进行匹配实验,该文算法均能获得可靠的匹配结果,验证该算法的鲁棒性。通过与不同窗口、不同算法进行对比分析,本算法能有效减少窗口内像素点深度不一致引起的错误匹配,且在增加匹配点数量的同时提高匹配精度和可靠性。

关键词(KeyWords)： 特征点匹配;局部仿射变换;三角网约束;边缘检测;自适应窗口

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41101452);; 地球观测与时空信息科学国家测绘地理信息局重点实验室开放基金项目(201801);; 辽宁省教育厅科学研究一般项目(LJYL010)

作者(Author): 王竞雪;张晶;

Email:

DOI: 10.16251/j.cnki.1009-2307.2019.09.018

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