动作捕捉（英语：Motion capture），又称为动态捕捉，是指记录并处理人或其他物体动作的技术。它广泛应用于军事、娱乐、体育、医疗应用、计算机视觉以及机器人技术等诸多领域。在电影制作和电子游戏开发领域，它通常是记录人类演员的动作，并将其转换为数字模型的动作，并生成二维或三维的计算机动画。当它捕捉面部或手指的细微动作时，它通常被称为性能捕获（performance capture）。在许多领域，动作捕捉有时也被称为运动跟踪（motion tracking），但在电影制作和游戏开发领域，运动跟踪通常是指匹配移动（match moving）。

Motion capture (Mo-cap for short) is the process of recording the movement of objects or people. It is used in military, entertainment, sports, medical applications, and for validation of computer vision and robotics. In filmmaking and video game development, it refers to recording actions of human actors, and using that information to animate digital character models in 2D or 3D computer animation. When it includes face and fingers or captures subtle expressions, it is often referred to as performance capture. In many fields, motion capture is sometimes called motion tracking, but in filmmaking and games, motion tracking usually refers more to match moving.