论文标题
监视!用于拍摄长时间的交互式摄像头控制器
LookOut! Interactive Camera Gimbal Controller for Filming Long Takes
论文作者
论文摘要
拍摄长移动相机拍摄时,相机操作员的工作具有挑战性,并且潜在危险。从广义上讲,操作员必须将演员保持框架,同时安全地围绕障碍,并实现艺术愿景。我们提出了一个统一的硬件和软件系统,该系统分配了一些相机操作员的负担,从而释放了他们在拍摄过程中专注于安全和美学。我们的实时系统为独奏运营商提供了端到端的控制,因此他们可以在寻找行动与计划的故事板和框架的情况下进行平衡。默认情况下,我们没有现场监视器拍摄。 我们的监视系统围绕着轻巧的商品摄像头机构构建,对控制器进行了重大修改,该机构通常只提供主动稳定。我们的控制算法对语音命令,视频和预制脚本做出反应。具体而言,我们对实时视频供稿的自动监视可使操作员免于分心。在预生产中,艺术家使用我们的GUI设计一系列高级相机“行为”。这些可以根据故事板或宽松的目标(例如“两个演员”)来具体。然后,在拍摄过程中,从GUI出口的机器可读脚本与传感器读数绑在一起以驱动世界。为了验证我们的算法,我们比较了跟踪策略,界面和硬件协议,并从a)a)a)使用系统各个方面的电影制造商那里收集了印象,b)b)观看使用Lookout拍摄的镜头的电影制片人。
The job of a camera operator is challenging, and potentially dangerous, when filming long moving camera shots. Broadly, the operator must keep the actors in-frame while safely navigating around obstacles, and while fulfilling an artistic vision. We propose a unified hardware and software system that distributes some of the camera operator's burden, freeing them up to focus on safety and aesthetics during a take. Our real-time system provides a solo operator with end-to-end control, so they can balance on-set responsiveness to action vs planned storyboards and framing, while looking where they're going. By default, we film without a field monitor. Our LookOut system is built around a lightweight commodity camera gimbal mechanism, with heavy modifications to the controller, which would normally just provide active stabilization. Our control algorithm reacts to speech commands, video, and a pre-made script. Specifically, our automatic monitoring of the live video feed saves the operator from distractions. In pre-production, an artist uses our GUI to design a sequence of high-level camera "behaviors." Those can be specific, based on a storyboard, or looser objectives, such as "frame both actors." Then during filming, a machine-readable script, exported from the GUI, ties together with the sensor readings to drive the gimbal. To validate our algorithm, we compared tracking strategies, interfaces, and hardware protocols, and collected impressions from a) film-makers who used all aspects of our system, and b) film-makers who watched footage filmed using LookOut.