针对帧间变换为单映变换的视频序列全景图的绘制,提出了一种视频序列的全景图绘制算法.该算法首先采用基于模型的等级估计法对相邻帧的单映变换矩阵进行估计;然后采用基于RANSAC的特征点匹配方法对非相邻帧进行带指导的改进估计,以使其能够达到要求的子像素级精度;最后运用时间中值滤波绘制全景图.实验结果表明,该算法检测的全景图不仅帧间配准达到了一定的子像素级精度,而且基本达到了无缝连接.

A panorama rendering algorithm of video sequence based on homography transformation between frames is presented in this paper. Firstly, the hierarchical model-based motion estimation is adopted to compute the adjacent homography matrix. Then, for non-adjacent frames, the homography matrix is estimated by guided feature registration based on RANSAC algorithm, which can obtain sub-pixel accuracy. Finally, the video sequence panorama is rendered using temporal median filter.