关键词: 边缘提取, 图像匹配, 图像融合

Abstract: Aiming at single sensor’s limitation，this paper uses the technology of multi-sensor fusion，which furthest obtains the information description of target scene.Due to different imaging mechanisms，even though the remote sensing images are accurately matched，the edges extracted will not be in the same location.This paper firstly adopts Canny discrete criteria to extract the optical image，and adopts the ratio algorithm to extract the SAR image.By adopting the methods of moment invariants to match each edge in the two edge feature images，obtaining the clearer and more complete edge feature images than the single one means more information descriptions.

Key words: edge detection, image matching, image fusion