Vision-language navigation is the task of directing an embodied agent to navigate in 3D scenes with natural language instructions. For the agent, inferring the long-term navigation target from visual-linguistic clues is crucial for reliable path planning, which, however, has rarely been studied before in literature. In this article, we propose a Target-Driven Structured Transformer Planner (TD-STP) for long-horizon goal-guided and room layout-aware navigation. Specifically, we devise an Imaginary Scene Tokenization mechanism for explicit estimation of the long-term target (even located in unexplored environments). In addition, we design a Structured Transformer Planner which elegantly incorporates the explored room layout into a neural attention architecture for structured and global planning. Experimental results demonstrate that our TD-STP substantially improves previous best methods' success rate by 2% and 5% on the test set of R2R and REVERIE benchmarks, respectively. Our code is available at https://github.com/YushengZhao/TD-STP .
@article{arxiv.2207.11201,
title = {Target-Driven Structured Transformer Planner for Vision-Language Navigation},
author = {Yusheng Zhao and Jinyu Chen and Chen Gao and Wenguan Wang and Lirong Yang and Haibing Ren and Huaxia Xia and Si Liu},
journal= {arXiv preprint arXiv:2207.11201},
year = {2022}
}