Motion Style Transfer: Modular Low-Rank Adaptation for Deep Motion ForecastingDownload PDF

16 Jun 2022, 10:45 (modified: 13 Nov 2022, 19:16)CoRL 2022 PosterReaders: Everyone
Student First Author: yes
Keywords: Motion Forecasting, Trajectory Prediction, Distribution Shifts, Transfer Learning
TL;DR: We propose a modular low-rank adaptation method that enables fast adaptation of deep motion forecasting models to new styles with limited samples
Abstract: Deep motion forecasting models have achieved great success when trained on a massive amount of data. Yet, they often perform poorly when training data is limited. To address this challenge, we propose a transfer learning approach for efficiently adapting pre-trained forecasting models to new domains, such as unseen agent types and scene contexts. Unlike the conventional fine-tuning approach that updates the whole encoder, our main idea is to reduce the amount of tunable parameters that can precisely account for the target domain-specific motion style. To this end, we introduce two components that exploit our prior knowledge of motion style shifts: (i) a low-rank motion style adapter that projects and adjusts the style features at a low-dimensional bottleneck; and (ii) a modular adapter strategy that disentangles the features of scene context and motion history to facilitate a fine-grained choice of adaptation layers. Through extensive experimentation, we show that our proposed adapter design, coined MoSA, outperforms prior methods on several forecasting benchmarks.
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