Text2Loc: 3D Point Cloud Localization from Natural Language

We tackle the problem of 3D point cloud localization based on a few natural linguistic descriptions and introduce a novel neural network, Text2Loc, that fully interprets the semantic relationship between points and text. Text2Loc follows a coarse-to-fine localization pipeline: text-submap global place recognition, followed by fine localization. In global place recognition, relational dynamics among each textual hint are captured in a hierarchical transformer with max-pooling (HTM), whereas a balance between positive and negative pairs is maintained using text-submap contrastive learning. Moreover, we propose a novel matching-free fine localization method to further refine the location predictions, which completely removes the need for complicated text-instance matching and is lighter, faster, and more accurate than previous methods. Extensive experiments show that Text2Loc improves the localization accuracy by up to $2\times$ over the state-of-the-art on the KITTI360Pose dataset. We will make the code publicly available.

What Matters to Enhance Traffic Rule Compliance of Imitation Learning for Automated Driving

More research attention has recently been given to end-to-end autonomous driving technologies where the entire driving pipeline is replaced with a single neural network because of its simpler structure and faster inference time. Despite this appealing approach largely reducing the components in driving pipeline, its simplicity also leads to interpretability problems and safety issues arXiv:2003.06404. The trained policy is not always compliant with the traffic rules and it is also hard to discover the reason for the misbehavior because of the lack of intermediate outputs. Meanwhile, Sensors are also critical to autonomous driving's security and feasibility to perceive the surrounding environment under complex driving scenarios. In this paper, we proposed P-CSG, a novel penalty-based imitation learning approach with cross semantics generation sensor fusion technologies to increase the overall performance of End-to-End Autonomous Driving. We conducted an assessment of our model's performance using the Town 05 Long benchmark, achieving an impressive driving score improvement of over 15%. Furthermore, we conducted robustness evaluations against adversarial attacks like FGSM and Dot attacks, revealing a substantial increase in robustness compared to baseline models.More detailed information, such as code-based resources, ablation studies and videos can be found at https://hk-zh.github.io/p-csg-plus.

Penalty-Based Imitation Learning With Cross Semantics Generation Sensor Fusion for Autonomous Driving

With the rapid development of Pattern Recognition and Computer Vision technologies, tasks like object detection or semantic segmentation have achieved even better accuracy than human beings. Based on these solid foundations, autonomous driving is becoming an important research direction, aiming to revolute the future of transportation and mobility. Sensors are critical to autonomous driving's security and feasibility to perceive the surrounding environment. Multi-Sensor fusion has become a current research hot spot because of its potential for multidimensional perception and integration ability. In this paper, we propose a novel feature-level multi-sensor fusion technology for end-to-end autonomous driving navigation with imitation learning. Our paper mainly focuses on fusion technologies for Lidar and RGB information. We also provide a brand-new penalty-based imitation learning method to reinforce the model's compliance with traffic rules and unify the objective of imitation learning and the metric of autonomous driving.