2.5D Vehicle odometry estimation

t is well understood that in ADAS applications, a good estimate of the pose of the vehi cle is required. This paper proposes a metaphorically named 2.5D odometry, whereby the planar odometry derived from the yaw rate sensor and four wheel speed sensors is aug mented by a linear model of suspension. While the core of the planar odometry is a yaw rate model that is already understood in the literature, this is augmented by fitting a quadratic to the incoming signals, enabling interpolation, extrapolation, and a finer integration of the vehicle position. It is shown, by experimental results with a DGPS/IMU reference, that this model provides highly accurate odometry estimates, compared with existing methods. Utilising sensors that return the change in height of vehicle reference points with chang ing suspension configurations, a planar model of the vehicle suspension is defined, thus augmenting the odometry model. An experimental framework and evaluations criteria is presented by which the goodness of the odometry is evaluated and compared with existing methods. This odometry model has been designed to support low-speed surround-view camera systems that are well-known. Thus, some application results that show a perfor mance boost for viewing and computer vision applications using the proposed odometry are presented

FisheyePixPro: self-supervised pretraining using fisheye images for semantic segmentation

Self-supervised learning has been an active area of research in the past few years. Contrastive learning is a type of self-supervised learning method that has achieved a significant performance improvement on image classification task. However, there has been no work done in its application to fisheye images for autonomous driving. In this paper, we propose FisheyePixPro, which is an adaption of pixel level contrastive learning method PixPro [1] for fisheye images. This is the first attempt to pre-train a contrastive learning based model, directly on fisheye images in a self-supervised approach. We evaluate the performance of learned representations on the WoodScape dataset using segmentation task. Our FisheyePixPro model achieves a 65.78 mIoU score, a significant improvement over the PixPro model. This indicates that pre-training a model on fisheye images have a better performance on a downstream task