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首页> 外文会议>European Conference on Computer Vision(ECCV 2004) pt.4; 20040511-20040514; Prague; CZ >Monocular 3D Reconstruction of Human Motion in Long Action Sequences
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Monocular 3D Reconstruction of Human Motion in Long Action Sequences

机译：长动作序列中人类运动的单眼3D重建

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摘要

A novel algorithm is presented for the 3D reconstruction of human action in long (> 30 second) monocular image sequences. A sequence is represented by a small set of automatically found representative keyframes. The skeletal joint positions are manually located in each keyframe and mapped to all other frames in the sequence. For each keyframe a 3D key pose is created, and interpolation between these 3D body poses, together with the incorporation of limb length and symmetry constraints, provides a smooth initial approximation of the 3D motion. This is then fitted to the image data to generate a realistic 3D reconstruction. The degree of manual input required is controlled by the diversity of the sequence's content. Sports' footage is ideally suited to this approach as it frequently contains a limited number of repeated actions. Our method is demonstrated on a long (36 second) sequence of a woman playing tennis filmed with a non-stationary camera. This sequence required manual initialisation on < 1.5% of the frames, and demonstrates that the system can deal with very rapid motion, severe self-occlusions, motion blur and clutter occurring over several concurrent frames. The monocular 3D reconstruction is verified by synthesising a view from the perspective of a 'ground truth' reference camera, and the result is seen to provide a qualitatively accurate 3D reconstruction of the motion.
机译：提出了一种新颖的算法，可以对长（> 30秒）单眼图像序列中的人类动作进行3D重建。序列由一小组自动找到的代表性关键帧表示。骨骼关节位置手动位于每个关键帧中，并映射到序列中的所有其他帧。对于每个关键帧，都会创建3D关键姿势，并在这些3D身体姿势之间进行插值，并结合肢体长度和对称性约束，从而提供3D运动的平滑初始近似。然后将其拟合到图像数据以生成逼真的3D重建。所需的手动输入程度由序列内容的多样性控制。体育镜头非常适合这种方法，因为它经常包含有限的重复动作。我们的方法在长时间（36秒）用非固定式摄像机拍摄的女子打网球上得到了证明。此序列需要在少于1.5％的帧上进行手动初始化，并证明该系统可以处理非常快的运动，严重的自遮挡，运动模糊以及在多个并发帧上发生的混乱现象。通过从“地面真实”参考相机的角度合成视图来验证单眼3D重建，并可以看到结果提供了定性准确的运动3D重建。

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