Forward-looking Scene Matching With RST Invariant Conformation Based On Fourier-Mellin Transform

摘要

Forward-looking scene matching is a firenew technique for terminal guidance of intending precision-guided weapons. As conventional template matching methods can not overcome perspective transmutation of forward-looking imaging, a novel method based on Fourier-Mellin transform and phaseonly correlation (FMPOC) is proposed in this paper.The FMPOC first employs the Fourier-Mellin magnitude to determine RST invariant of an image pair with its property of invariance to rotation and scale.Then, reconstruct real- time image with the computed rotation and scale parameters. Hereafter, phase-only correlation is used to find the final translations between reference image and the reconstructed image.Experiments over a range of RST attacks showed that the proposed method can obtain a significant improvement in matching capability compared with conventional cross-correlation matching, and this can be a good demonstration for deep research of forwardlooking scene matching.