影像匹配定位中的直线倾角直方图不变矩法

An Image Matching Approach Based on the Invariant Moment of Slope Angle Histogram

针对现有的基于图像直方图不变矩的匹配方法大多不能适应图像存在较大旋转变换的问题,提出直线倾角直方图不变矩的概念,并将其应用到影像的匹配与定位中.该方法采用直线段拟合表示图像边缘,利用直线倾角在基准图与待匹配图上的一致性进行影像匹配.实验结果证明,倾角直方图不变矩可以作为影像特征的描述形式,利用其进行影像匹配与定位是可行的.

Most of the existing image matching methods based on the invariant moment of image histogram can not adapt to the images with large rotation. A concept of invariant moment of slope angle histogram （IMSAH） is introduced and applied in image matching. Edges of images are fitted by groups of lines, and the consistency of the slope angles is used for matching. Experiments show that IMSAH can be used as an image descriptor, and the image matching based on IMSAH is feasible.