Trajectories are fundamental to winning in alpine skiing. Tools enabling the analysis of such curves can enhance the training activity and enrich broadcasting content. In this paper, we propose SkiTraVis, an algorithm to visualize the sequence of points traversed by a skier during its performance. SkiTraVis works on monocular videos and constitutes a pipeline of a visual tracker to model the skier's motion and of a frame correspondence module to estimate the camera's motion. The separation of the two motions enables the visualization of the trajectory according to the moving camera's perspective. We performed experiments on videos of real-world professional competitions to quantify the visualization error, the computational efficiency, as well as the applicability. Overall, the results achieved demonstrate the potential of our solution for broadcasting media enhancement and coach assistance.

翻译：轨迹是高山滑雪获胜的关键。能够分析此类曲线的工具可以增强训练活动并丰富广播内容。在本文中，我们提出SkiTraVis，一种可视化滑雪者在表演过程中所经过点序列的算法。SkiTraVis适用于单目视频，构成了一条包含视觉跟踪器（用于建模滑雪者运动）和帧对应模块（用于估计摄像机运动）的处理流水线。两种运动的分离使得能够根据移动摄像机的视角可视化轨迹。我们在真实世界专业比赛的视频上进行了实验，以量化可视化误差、计算效率以及适用性。总体而言，所取得的结果证明了我们的解决方案在广播媒体增强和教练辅助方面的潜力。