一种改进的 Hu 不变矩多源影像匹配方法

摘要

Hu不变矩对多源影像进行匹配时，无法对抗大幅度旋转和灰度差异，而且计算量较大无法快速匹配。本文结合多源影像之间的区别和联系，针对Hu不变矩的适用性和计算过程，从匹配窗口设计、影像预处理、亮度因子、计算过程等4个方面进行改进。实验结果表明，改进后的Hu不变矩匹配方法可以抵抗大幅度影像旋转和灰度差异，而且提高了匹配准确度和速度。%For multi-source image matching difficulty, Hu invariant moments matching method can’ t resist big angle rotation and grayscale differences, and sometimes it leads wrong result.In this paper, we improve Hu invariant moments form four aspects: the matching window design, image preprocessing, brightness factor and calculation process.Experimental results show that the improved method can resist big angle rotation gradation differences and improve the speed.