FLEX: Parameter-free Multi-view 3D Human Motion Reconstruction

Maria J. Danford

Present-day human movement reconstruction tactics applying movement seize sensors call for a cumbersome and costly process. The widespread availability of video recordings from RGB cameras can make this task simpler.

Nonetheless, multi-cameras settings which are applied to prevent occlusion and depth ambiguity are continue to a dilemma. A new paper on arXiv.org suggests a parameter-absolutely free multi-perspective movement reconstruction algorithm.

Physique movement seize. Impression credit: Raíssa Ruschel via Flickr, CC BY two.

It depends on the perception that the 3D angle amongst the skeletal areas is invariant to the digicam placement. A neural community learns to predict joint angles and bone lengths without the need of applying any of the digicam parameters. A novel fusion layer is applied to enhance the assurance of every single joint detection and mitigate occlusions. Qualitative and quantitative evaluations show that the proposed model outperforms state-of-the-artwork approaches in movement and pose reconstruction by a substantial margin.

The escalating availability of video recordings created by many cameras has offered new usually means for mitigating occlusion and depth ambiguities in pose and movement reconstruction approaches. Nevertheless, multi-perspective algorithms strongly rely on digicam parameters, in particular, the relative positions among the the cameras. These dependency will become a hurdle when shifting to dynamic seize in uncontrolled settings. We introduce FLEX (Totally free muLti-perspective rEconstruXion), an close-to-close parameter-absolutely free multi-perspective model. FLEX is parameter-absolutely free in the feeling that it does not call for any digicam parameters, neither intrinsic nor extrinsic. Our critical concept is that the 3D angles amongst skeletal areas, as perfectly as bone lengths, are invariant to the digicam placement. That’s why, understanding 3D rotations and bone lengths alternatively than locations permits predicting widespread values for all digicam views. Our community normally takes many video streams, learns fused deep options by way of a novel multi-perspective fusion layer, and reconstructs a one consistent skeleton with temporally coherent joint rotations. We display quantitative and qualitative outcomes on the Human3.6M and KTH Multi-perspective Soccer II datasets. We examine our model to state-of-the-artwork approaches that are not parameter-absolutely free and show that in the absence of digicam parameters, we outperform them by a substantial margin whilst getting comparable outcomes when digicam parameters are readily available. Code, skilled styles, video demonstration, and extra components will be readily available on our undertaking website page.

Investigate paper: Gordon, B., Raab, S., Azov, G., Giryes, R., and Cohen-Or, D., “FLEX: Parameter-absolutely free Multi-perspective 3D Human Movement Reconstruction”, 2021. Website link: https://arxiv.org/abs/2105.01937

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