DONG Yongfeng, LEI Xiaohui, DONG Yao, et al. Research on improving ORB feature extraction and matching algorithm[J]. 2020, (4): 59-62. DOI: 10.13873/J.1000-9787(2020)04-0059-04.
改进ORB特征提取与匹配算法研究
摘要
在实现图像拼接过程中
ORB算法能够较好地解决运行实时性问题
但是在机器人与实际环境之间的距离变化
导致图像尺寸发生改变
或运动过程中抖动导致的图像模糊时
该算法匹配效率和准确度较差。针对该问题
提出一种改进的ORB特征提取与匹配算法。首先提取具有尺度不变性的特征点
然后利用汉明距离对特征点进行分类、匹配
最后利用改进的RANSAC算法
有效消除误匹配点。实验结果表明:改进算法在提升了匹配的效率和准确度的同时可以满足实时性的要求。
Abstract
In the process of realizing image Mosaic
ORB algorithm can solve the real-time problem of operation well. However
due to the distance change between the robot and the actual environment
results in change of image size or the image is blurred jittering in the process of movement
the matching efficiency and accuracy of algorithm are poor. To solve this problem
an improved ORB feature extraction and matching algorithm is proposed. Firstly
feature points with scale invariance are extracted
then the feature points are classified and matched by Hamming distance
and finally
the mismatched points are effectively eliminated by the improved RANSAC algorithm.Experimental results show that the improved algorithm can improve the matching efficiency and accuracy and meet the real-time requirements