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基于不变特征的运动视频序列自动配准算法

DOI: 10.11834/jig.20080227

Keywords: 图像配准,不变特征,多尺度空间,主成分分析,层叠分类器

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Abstract:

快速、鲁棒的图像配准是运动视频处理的基础,也是制约后继应用稳定性及可靠性的关键。针对运动视频中存在的图像平移、旋转、尺度及光照变化,提出一种基于不变特征的快速图像配准算法,包括特征点检测、描述和匹配。首先通过多层箱式滤波器构建图像多尺度空间,并同时考虑质量与空间分布检测特征点;然后用主成分分析法对SIFT(scaleinvariantfeaturetransform)特征进行降维,用于特征描述;最后根据描述子主成分的差异设计层叠分类器,加速特征匹配。定量分析实验和对视觉监视系统中球形摄像机和无人机航拍视频的实验结果表明,该算法具有良好的匹配性能,为后继运动载台上的运动目标检测、跟踪、分类等处理提供了坚实基础。

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