AKAZE结合自适应局部仿射匹配的视差图像特征匹配算法

Disparity image feature matching algorithm based on AKAZE and adaptive local affine matching

  • 摘要: 针对常用的图像特征匹配算法对具有视差的图像在图像特征匹配阶段会产生大量误匹配点的问题,提出了一种AKAZE(accelerated-KAZE)算法结合自适应局部仿射匹配的特征匹配算法。首先,采用AKAZE算法提取特征点;接着,采用二进制描述符M-LDB(modified-local difference binary)进行描述并进行暴力匹配产生粗匹配点对;最后,基于图像的仿射变换可以提供较强的几何约束这一特性,采用自适应局部仿射匹配完成精匹配。实验结果表明,该算法针对具有旋转变化、尺度变化、视角变化的图像匹配,具有提取特征点均匀、匹配准确等效果,提取的正确特征点数量分别平均相对于SIFT算法提升了1.66倍、SURF算法提升了1.08倍、ORB算法提升了6.92倍、GMS算法提升了1.23倍,能够满足具有较大视差图像匹配的需求。

     

    Abstract: Aiming at the problem that common image feature matching algorithms will produce a large number of mismatched points in the image feature matching stage for images with parallax, a image feature matching algorithm combining accelerated-KAZE (AKAZE) algorithm with adaptive local affine matching was proposed. Firstly, the AKAZE algorithm was used to extract the feature points. Then, the binary descriptor M-LDB was used for description and the brute force matching was performed to generate coarse matching point pairs. Finally, the image-based affine transformation could provide the characteristic of strong geometric constraints, and adopted adaptive local affine matching to complete fine matching. The experimental results show that the algorithm has the effects of uniform extraction of feature points and accurate matching for image matching with rotation change, scale change, and viewing angle change at the same time. The number of correct feature points extracted is increased by average 1.66 times compared with SIFT algorithm, 1.08 times compared with SURF algorithm, 6.92 times compared with ORB algorithm and 1.23 times compared with GMS algorithm, respectively. It can meet the needs of image matching with large disparity.

     

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