基于多尺度特征的遥感图像密集匹配方法

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提出一种利用多尺度特征的无人飞艇遥感平台获取的序列航拍图像生成密集匹配视差图像的方法。运用尺度不变特征变换(SIFT)算法从两幅相邻图像中提取特征点,基于欧氏距离进行粗匹配,并通过缩小搜索范围提高粗匹配效率,再通过随机抽样一致性(RANSAC)算法估计基础矩阵,利用对极几何约束关系剔除误匹配,进行精确匹配,提高匹配的稳健性和精度,然后利用区域生长算法进行特征点密集匹配生成相应视差图像。实验表明算法在保持稳健性的同时,可以降低时间复杂度,获得相当规模的密集匹配点,得到良好的可视效果。
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