FutureHuman3D: Forecasting Complex Long-Term 3D Human Behavior from Video Observations

• URL: http://arxiv.org/abs/2211.14309v3
• Date: Fri, 17 May 2024 14:57:40 GMT
• Title: FutureHuman3D: Forecasting Complex Long-Term 3D Human Behavior from Video Observations
• Authors: Christian Diller, Thomas Funkhouser, Angela Dai,
• Abstract summary: We present a generative approach to forecast long-term future human behavior in 3D, requiring only weak supervision from readily available 2D human action data. We jointly predict high-level coarse action labels together with their low-level fine-grained realizations as characteristic 3D human poses. Our experiments demonstrate the complementary nature of joint action and 3D pose prediction.
• Score: 26.693664045454526
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a generative approach to forecast long-term future human behavior in 3D, requiring only weak supervision from readily available 2D human action data. This is a fundamental task enabling many downstream applications. The required ground-truth data is hard to capture in 3D (mocap suits, expensive setups) but easy to acquire in 2D (simple RGB cameras). Thus, we design our method to only require 2D RGB data at inference time while being able to generate 3D human motion sequences. We use a differentiable 2D projection scheme in an autoregressive manner for weak supervision, and an adversarial loss for 3D regularization. Our method predicts long and complex human behavior sequences (e.g., cooking, assembly) consisting of multiple sub-actions. We tackle this in a semantically hierarchical manner, jointly predicting high-level coarse action labels together with their low-level fine-grained realizations as characteristic 3D human poses. We observe that these two action representations are coupled in nature, and joint prediction benefits both action and pose forecasting. Our experiments demonstrate the complementary nature of joint action and 3D pose prediction: our joint approach outperforms each task treated individually, enables robust longer-term sequence prediction, and improves over alternative approaches to forecast actions and characteristic 3D poses.

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