臧丽日,杨树文,张萌生,申顺发

• 1:兰州交通大学测绘与地理信息学院
• 2:地理国情监测技术应用国家地方联合工程研究中心
• 3:甘肃省地理国情监测工程实验室

摘要(Abstract)：

由于合成孔径雷达(SAR)影像与光学影像之间存在明显的辐射和几何差异,将两者配准仍是影像精确配准领域亟待解决的难题。针对配准时出现的精度差效率低、计算量较大且配准易陷入局部极值等问题,该文提出一种耦合梯度互信息和部分体积(PV)插值的SAR与光学影像配准算法。首先,将该文改进的梯度互信息方法(NGMI)作为配准的相似性测度;其次,利用改进PV插值法计算NGMI,采用余弦函数作为插值核函数,以扩大插值的邻域范围;最后,将NGMI与PV插值法耦合进行SAR与光学影像的配准。实验表明,该文方法行之有效,在减少计算量的同时提高了配准精度,一定程度上抑制了局部极值,降低了影像误配的概率。

关键词(KeyWords)： SAR;光学影像;梯度互信息;PV插值算法;图像配准

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2017YFB0504201);; 国家自然科学基金项目(41761082);; 兰州市人才创新创业项目(2015-RC-28);; 兰州交通大学优秀平台支持项目(201806)

作者(Author): 臧丽日,杨树文,张萌生,申顺发

DOI: 10.16251/j.cnki.1009-2307.2021.04.011

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