关键词: 小信息量, 图像匹配, 相位相关, 傅里叶变换

Abstract: To improve far-distance navigation accuracy, solve the difficulties of image registration with little information and small template, resolve problems of phase correlation registration algorithm which including inadequate utilization of high-frequency information, registration accuracy influenced by size of template, poor anti-noise performance, this paper proposes a new registration algorithm based on LOG edge detection and phase correlation. This new algorithm performs LOG edge detection in reference image and template, does image registration between template and reference image using phase correlation algorithm. Proved by real images, the new algorithm’s performance is better than phase correlation algorithm in several aspects：influence of template size, registration accuracy, performance for anti-noise, stability and reliability of target location.

Key words: little information, image registration, phase correlation, Fourier transform