基于摄像机纵向运动的序列图像的实时漫游

Real-time Walkthrough Based on Serial Images from Camera Lengthways Motion

对于摄像机纵向运动的序列图像,提出了一种基于极线几何约束关系的当前视点目标图像生成算法:1)利用基于傅立 叶变换的方法,得到远视点源图像中和近视点源图像无对应点的区域,并用一种背景色将其填充,得到填充后的远视点源图像; 2)利用极线的整体匹配性质在两幅源图像中确定遍历整个源图像的对应源极线;3)将所有对应源极线按友度进行分段;4)用动 态规划匹配法确定对应源极线上段与段之间的匹配关系;5)通过两条对应源极线插值合成一条目标极线,生成当前视点的目标 图像;6)对上一步得到的目标图像的背景色区域加以处理,得到最终的当前视点目标图像．提出了一种链表数据结构存储每相 邻两幅源图像之间的预处理信息,漫游时实时读取．开发了一个图像漫游器,使用户能在其中实现不同视点的实时漫游．

As for serial images from camera lengthways motion, an algorithm of destination image synthesis for current viewpoint based on epipolar geometry constraints is proposed in this paper. 1） The region that has no corresponding points in the far-viewpoint source image is found using the FFT method, and filled in using a background color to obtain the filled far-viewpoint source image. 2） The corresponding source epiploar lines that cover the source images are obtained using the whole matching character of epipolar lines. 3） All the source epipolar lines are divided into gray segments. 4） The matching relation between gray segments of corresponding source epipolar lines is determined using dynamic programming matching method. 5） The destination image for current viewpoint is synthesized through interpolating two source epipolar lines into one destination epipolar line. 6） The region with background color is treated to obtain the final destination image. Besides, a kind of link data structure that stores the pretreatment information of adjacent images is proposed to ensure real-time walkthrough. An image browser is also developed to realize the real-time walkthrough of different viewpoints.