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：轨迹是高山滑雪竞技中取胜的基础。能够分析此类轨迹的工具，可以增强训练效果并丰富转播内容。本文提出SkiTraVis算法，用于可视化滑雪者在比赛过程中经过的点序列。SkiTraVis适用于单目视频，其构成包含一个用于建模滑雪者运动的视觉跟踪器，以及一个用于估计摄像机运动的帧对应模块。两种运动的分离，使得能够从移动摄像机的视角实现轨迹可视化。我们在真实职业比赛的视频上进行了实验，量化了可视化误差、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转播媒体增强与教练辅助方面的潜力。