no code implementations • 16 Dec 2024 • Yuxuan Xia, Ángel F. García-Fernández, Johan Karlsson, Ting Yuan, Kuo-Chu Chang, Lennart Svensson
This correspondence presents a probabilistic generalization of the Generalized Optimal Sub-Pattern Assignment (GOSPA) metric, termed P-GOSPA.
no code implementations • 11 Dec 2024 • Jan Krejčí, Oliver Kost, Ondřej Straka, Yuxuan Xia, Lennart Svensson, Ángel F. García-Fernández
Multi-object tracking algorithms are deployed in various applications, each with unique performance requirements.
1 code implementation • 5 Dec 2024 • Erik Brorsson, Lennart Svensson, Kristofer Bengtsson, Knut Åkesson
We address multi-view pedestrian detection in a setting where labeled data is collected using a multi-camera setup different from the one used for testing.
1 code implementation • 25 Nov 2024 • Georg Hess, Carl Lindström, Maryam Fatemi, Christoffer Petersson, Lennart Svensson
Ensuring the safety of autonomous robots, such as self-driving vehicles, requires extensive testing across diverse driving scenarios.
no code implementations • 4 Nov 2024 • Yu Ge, Ossi Kaltiokallio, Hui Chen, Jukka Talvitie, Yuxuan Xia, Giyyarpuram Madhusudan, Guillaume Larue, Lennart Svensson, Mikko Valkama, Henk Wymeersch
This paper addresses the target handover challenge in DISAC systems and introduces a method enabling BSs to share essential target trajectory information at appropriate time steps, facilitating seamless handovers to other BSs.
no code implementations • 20 Jul 2024 • Yuxuan Xia, Ángel F. García-Fernández, Lennart Svensson
Also, compared to the trajectory PHD filter, which can only estimate alive trajectories, the hybrid PHD-PMB trajectory smoother enables the estimation of the set of all trajectories.
1 code implementation • 16 Jul 2024 • Erik Wallin, Lennart Svensson, Fredrik Kahl, Lars Hammarstrand
Moreover, we propose an approach to estimate the conditional distributions of scores given ID or OOD data, enabling probabilistic predictions of data being ID or OOD.
no code implementations • 16 Jul 2024 • Yu Ge, Ossi Kaltiokallio, Yuxuan Xia, Ángel F. García-Fernández, Hyowon Kim, Jukka Talvitie, Mikko Valkama, Henk Wymeersch, Lennart Svensson
Simultaneous localization and mapping (SLAM) methods need to both solve the data association (DA) problem and the joint estimation of the sensor trajectory and the map, conditioned on a DA.
no code implementations • 24 Mar 2024 • Carl Lindström, Georg Hess, Adam Lilja, Maryam Fatemi, Lars Hammarstrand, Christoffer Petersson, Lennart Svensson
Specifically, we evaluate object detectors and an online mapping model on real and simulated data, and study the effects of different fine-tuning strategies. Our results show notable improvements in model robustness to simulated data, even improving real-world performance in some cases.
1 code implementation • 6 Mar 2024 • Erik Brorsson, Knut Åkesson, Lennart Svensson, Kristofer Bengtsson
We implement ECAP on top of the recent method MIC and boost its performance on two synthetic-to-real domain adaptation benchmarks.
no code implementations • 26 Feb 2024 • Amanda Olmin, Jakob Lindqvist, Lennart Svensson, Fredrik Lindsten
Noise-contrastive estimation (NCE) is a popular method for estimating unnormalised probabilistic models, such as energy-based models, which are effective for modelling complex data distributions.
no code implementations • 22 Dec 2023 • Juliano Pinto, Georg Hess, Yuxuan Xia, Henk Wymeersch, Lennart Svensson
Multi-object tracking (MOT) is the task of estimating the state trajectories of an unknown and time-varying number of objects over a certain time window.
1 code implementation • 6 Dec 2023 • Yuxuan Xia, Ángel F. García-Fernández, Lennart Svensson
This paper considers a batch solution to the multi-object tracking problem based on sets of trajectories.
2 code implementations • CVPR 2024 • Adam Tonderski, Carl Lindström, Georg Hess, William Ljungbergh, Lennart Svensson, Christoffer Petersson
Neural radiance fields (NeRFs) have gained popularity in the autonomous driving (AD) community.
1 code implementation • 10 Nov 2023 • Jinhao Gu, Ángel F. García-Fernández, Robert E. Firth, Lennart Svensson
This paper proposes a metric to measure the dissimilarity between graphs that may have a different number of nodes.
no code implementations • 20 Sep 2023 • Isak Meding, Alexander Bodin, Adam Tonderski, Joakim Johnander, Christoffer Petersson, Lennart Svensson
We find that DESOT obtains the benefits of deep ensembles, in terms of predictive and uncertainty estimation performance, while avoiding the added computational cost.
no code implementations • 26 Aug 2023 • Yu Ge, Hyowon Kim, Lennart Svensson, Henk Wymeersch, Sumei Sun
Millimeter-wave (mmWave) signals provide attractive opportunities for sensing due to their inherent geometrical connections to physical propagation channels.
2 code implementations • 26 Jul 2023 • Anders Sjöberg, Jakob Lindqvist, Magnus Önnheim, Mats Jirstrand, Lennart Svensson
However, this parameterisation does not, in general, define an energy, and the MH acceptance probability is therefore unavailable, and generally ill-defined.
no code implementations • 5 May 2023 • Hyowon Kim, Angel F. García-Fernández, Yu Ge, Yuxuan Xia, Lennart Svensson, Henk Wymeersch
In this paper, we develop BP rules for factor graphs defined on sequences of RFSs where each RFS has an unknown number of elements, with the intention of deriving novel inference methods for RFSs.
Simultaneous Localization and Mapping Vocal Bursts Type Prediction
no code implementations • 21 Mar 2023 • Yu Ge, Hedieh Khosravi, Fan Jiang, Hui Chen, Simon Lindberg, Peter Hammarberg, Hyowon Kim, Oliver Brunnegård, Olof Eriksson, Bengt-Erik Olsson, Fredrik Tufvesson, Lennart Svensson, Henk Wymeersch
Positioning with 5G signals generally requires connection to several base stations (BSs), which makes positioning more demanding in terms of infrastructure than communications.
1 code implementation • 24 Jan 2023 • Erik Wallin, Lennart Svensson, Fredrik Kahl, Lars Hammarstrand
Open-set semi-supervised learning (OSSL) embodies a practical scenario within semi-supervised learning, wherein the unlabeled training set encompasses classes absent from the labeled set.
1 code implementation • 13 Dec 2022 • Georg Hess, Adam Tonderski, Christoffer Petersson, Kalle Åström, Lennart Svensson
We also explore zero-shot classification and show that LidarCLIP outperforms existing attempts to use CLIP for point clouds by a large margin.
no code implementations • 29 Nov 2022 • Yu Ge, Ossi Kaltiokallio, Hyowon Kim, Jukka Talvitie, Sunwoo Kim, Lennart Svensson, Mikko Valkama, Henk Wymeersch
We distinguish the different types of sensing problems and then focus on mapping and SLAM as running examples.
1 code implementation • 19 Sep 2022 • Lechi Li, Chen Dai, Yuxuan Xia, Lennart Svensson
We compare the performance of the transformer-based fusion method with a well-performing model-based Bayesian fusion method in several simulated scenarios with different parameter settings using synthetic data.
no code implementations • 22 Aug 2022 • Yu Ge, Ossi Kaltiokallio, Hui Chen, Fan Jiang, Jukka Talvitie, Mikko Valkama, Lennart Svensson, Henk Wymeersch
Networks in 5G and beyond utilize millimeter wave (mmWave) radio signals, large bandwidths, and large antenna arrays, which bring opportunities in jointly localizing the user equipment and mapping the propagation environment, termed as simultaneous localization and mapping (SLAM).
1 code implementation • 20 Jul 2022 • Yuxuan Xia, Ángel F. García-Fernández, Florian Meyer, Jason L. Williams, Karl Granström, Lennart Svensson
First, we present a PMBM conjugate prior on the posterior of sets of trajectories for a generalized measurement model, in which each object generates an independent set of measurements.
1 code implementation • 13 Jul 2022 • Ángel F. García-Fernández, Yuxuan Xia, Lennart Svensson
This paper provides a comparative analysis between the adaptive birth model used in the labelled random finite set literature and the track initiation in the Poisson multi-Bernoulli mixture (PMBM) filter, with point-target models.
1 code implementation • 1 Jul 2022 • Georg Hess, Johan Jaxing, Elias Svensson, David Hagerman, Christoffer Petersson, Lennart Svensson
Masked autoencoding has become a successful pretraining paradigm for Transformer models for text, images, and, recently, point clouds.
no code implementations • 16 Jun 2022 • Yuxuan Xia, Lennart Svensson, Ángel F. García-Fernández, Jason L. Williams, Daniel Svensson, Karl Granström
In this paper, we first derive a general multi-trajectory backward smoothing equation based on random finite sets of trajectories.
1 code implementation • 11 May 2022 • Erik Wallin, Lennart Svensson, Fredrik Kahl, Lars Hammarstrand
Following the success of supervised learning, semi-supervised learning (SSL) is now becoming increasingly popular.
no code implementations • 5 May 2022 • Hyowon Kim, Karl Granström, Lennart Svensson, Sunwoo Kim, Henk Wymeersch
Secondly, the Poisson multi-Bernoulli (PMB) SLAM filter is based on the standard reduction from PMBM to PMB, but involves a novel interpretation based on auxiliary variables and a relation to Bethe free energy.
1 code implementation • 18 Apr 2022 • Amanda Olmin, Jakob Lindqvist, Lennart Svensson, Fredrik Lindsten
Annotating data for supervised learning can be costly.
1 code implementation • 15 Mar 2022 • Georg Hess, Christoffer Petersson, Lennart Svensson
Accurate uncertainty estimates are essential for deploying deep object detectors in safety-critical systems.
1 code implementation • 16 Feb 2022 • Juliano Pinto, Georg Hess, William Ljungbergh, Yuxuan Xia, Henk Wymeersch, Lennart Svensson
Multi-object tracking (MOT) is the problem of tracking the state of an unknown and time-varying number of objects using noisy measurements, with important applications such as autonomous driving, tracking animal behavior, defense systems, and others.
no code implementations • 5 Dec 2021 • Yu Ge, Yibo Wu, Fan Jiang, Ossi Kaltiokallio, Jukka Talvitie, Mikko Valkama, Lennart Svensson, Henk Wymeersch
In this paper, we study the linearization of the measurement function with respect to the posterior PDF, and implement the iterated posterior linearization filter into the Poisson multi-Bernoulli SLAM filter.
2 code implementations • 26 Oct 2021 • Ángel F. García-Fernández, Abu Sajana Rahmathullah, Lennart Svensson
This paper proposes a metric for sets of trajectories to evaluate multi-object tracking algorithms that includes time-weighted costs for localisation errors of properly detected targets, for false targets, missed targets and track switches.
no code implementations • 8 Sep 2021 • Yu Ge, Ossi Kaltiokallio, Hyowon Kim, Fan Jiang, Jukka Talvitie, Mikko Valkama, Lennart Svensson, Sunwoo Kim, Henk Wymeersch
Millimeter wave (mmWave) signals are useful for simultaneous localization and mapping (SLAM), due to their inherent geometric connection to the propagation environment and the propagation channel.
no code implementations • 2 Sep 2021 • Jakob Sjudin, Martin Marcusson, Lennart Svensson, Lars Hammarstrand
PHD filtering is a common and effective multiple object tracking (MOT) algorithm used in scenarios where the number of objects and their states are unknown.
no code implementations • 10 Aug 2021 • Juliano Pinto, Yuxuan Xia, Lennart Svensson, Henk Wymeersch
Evaluating the performance of multi-object tracking (MOT) methods is not straightforward, and existing performance measures fail to consider all the available uncertainty information in the MOT context.
1 code implementation • 1 Apr 2021 • Juliano Pinto, Georg Hess, William Ljungbergh, Yuxuan Xia, Lennart Svensson, Henk Wymeersch
We show that the proposed model outperforms state-of-the-art Bayesian filters in complex scenarios, while matching their performance in simpler cases, which validates the applicability of deep-learning also in the model-based regime.
1 code implementation • 9 Nov 2020 • Ángel F. García-Fernández, Jason L. Williams, Lennart Svensson, Yuxuan Xia
This paper proposes a Poisson multi-Bernoulli mixture (PMBM) filter for coexisting point and extended targets, i. e., for scenarios where there may be simultaneous point and extended targets.
no code implementations • 5 Aug 2020 • Yuxuan Xia, Lennart Svensson, Ángel F. García-Fernández, Karl Granström, Jason L. Williams
This paper presents a solution for recovering full trajectory information, via the calculation of the posterior of the set of trajectories, from a sequence of multitarget (unlabelled) filtering densities and the multitarget dynamic model.
2 code implementations • 17 Jul 2020 • Wilhelm Tranheden, Viktor Olsson, Juliano Pinto, Lennart Svensson
In this paper we address the problem of unsupervised domain adaptation (UDA), which attempts to train on labelled data from one domain (source domain), and simultaneously learn from unlabelled data in the domain of interest (target domain).
Ranked #15 on Domain Adaptation on Cityscapes to ACDC
2 code implementations • 15 Jul 2020 • Viktor Olsson, Wilhelm Tranheden, Juliano Pinto, Lennart Svensson
A key challenge is that common augmentations used in semi-supervised classification are less effective for semantic segmentation.
no code implementations • 28 Jun 2020 • Yu Ge, Hyowon Kim, Fuxi Wen, Lennart Svensson, Sunwoo Kim, Henk Wymeersch
5G millimeter wave (mmWave) signals can be used to jointly localize the receiver and map the propagation environment in vehicular networks, which is a typical simultaneous localization and mapping (SLAM) problem.
no code implementations • 28 Mar 2020 • Ángel F. García-Fernández, Lennart Svensson, Jason L. Williams, Yuxuan Xia, Karl Granström
The filters are based on propagating a Poisson multi-Bernoulli (PMB) density on the corresponding set of trajectories through the filtering recursion.
1 code implementation • 26 Feb 2020 • Jakob Lindqvist, Amanda Olmin, Fredrik Lindsten, Lennart Svensson
Ensembles of neural networks have been shown to give better performance than single networks, both in terms of predictions and uncertainty estimation.
2 code implementations • 17 Dec 2019 • Karl Granström, Lennart Svensson, Yuxuan Xia, Jason Williams, Ángel F. García-Fernández
In this paper, we first show that the PMBM density is also conjugate for sets of trajectories with the standard point target measurement model.
no code implementations • 14 Dec 2019 • John Moberg, Lennart Svensson, Juliano Pinto, Henk Wymeersch
A simple approach to obtaining uncertainty-aware neural networks for regression is to do Bayesian linear regression (BLR) on the representation from the last hidden layer.
1 code implementation • 4 Dec 2019 • Yuxuan Xia, Karl Granström, Lennart Svensson, Ángel F. García-Fernández, Jason L. Williams
A multi-scan trajectory PMBM filter and a multi-scan trajectory MBM filter, with the ability to correct past data association decisions to improve current decisions, are presented.
Signal Processing
1 code implementation • 28 Nov 2019 • Luca Caltagirone, Lennart Svensson, Mattias Wahde, Martin Sanfridson
Recent advances in the field of machine learning and computer vision have enabled the development of fast and accurate road detectors.
2 code implementations • 19 Nov 2019 • Yuxuan Xia, Karl Granström, Lennart Svensson, Ángel F. García-Fernández, Jason L. Williams
The Poisson multi-Bernoulli mixture (PMBM) is a multi-target distribution for which the prediction and update are closed.
Signal Processing
no code implementations • 23 Aug 2019 • Ángel F. García-Fernández, Lennart Svensson
In this paper, we show the spooky effect at a distance that arises in optimal estimation of multiple targets with the optimal sub-pattern assignment (OSPA) metric.
1 code implementation • 23 Aug 2019 • Ángel F. García-Fernández, Yuxuan Xia, Karl Granström, Lennart Svensson, Jason L. Williams
This paper presents the Gaussian implementation of the multi-Bernoulli mixture (MBM) filter.
4 code implementations • 12 Dec 2018 • Karl Granström, Lennart Svensson, Yuxuan Xia, Jason Williams, Angel F Garcia-Fernandez
By showing that the prediction and update in the PMBM filter can be viewed as an efficient method for calculating the time marginals of the RFS of trajectories, continuity in the same sense as MHT is established for the PMBM filter.
1 code implementation • 29 Nov 2018 • Yuxuan Xia, Karl Granström, Lennart Svensson, Ángel F. García-Fernández
This paper proposes an efficient implementation of the Poisson multi-Bernoulli mixture (PMBM) trajectory filter.
1 code implementation • 21 Nov 2018 • Ángel F. García-Fernández, Lennart Svensson
This paper presents the probability hypothesis density filter (PHD) and the cardinality PHD (CPHD) filter for sets of trajectories, which are referred to as the trajectory PHD (TPHD) and trajectory CPHD (TCPHD) filters.
no code implementations • 7 Nov 2018 • Maryam Fatemi, Karl Granström, Lennart Svensson, Francisco J. R. Ruiz, Lars Hammarstrand
The proposed method can handle uncertainties in the data associations and the cardinality of the set of landmarks, and is parallelizable, making it suitable for large-scale problems.
no code implementations • 18 Oct 2018 • Francisco J. R. Ruiz, Isabel Valera, Lennart Svensson, Fernando Perez-Cruz
New communication standards need to deal with machine-to-machine communications, in which users may start or stop transmitting at any time in an asynchronous manner.
1 code implementation • 21 Sep 2018 • Luca Caltagirone, Mauro Bellone, Lennart Svensson, Mattias Wahde
Whereas in the former two fusion approaches, the integration of multimodal information is carried out at a predefined depth level, the cross fusion FCN is designed to directly learn from data where to integrate information; this is accomplished by using trainable cross connections between the LIDAR and the camera processing branches.
1 code implementation • 4 Jan 2018 • Yuxuan Xia, Karl Granström, Lennart Svensson, Maryam Fatemi, Ángel F. García-Fernández, Jason L. Williams
The Poisson multi-Bernoulli mixture (PMBM) is a multi-object conjugate prior for the closed-form Bayes random finite sets filter.
no code implementations • 12 Sep 2017 • Christopher Innocenti, Henrik Lindén, Ghazaleh Panahandeh, Lennart Svensson, Nasser Mohammadiha
This paper aims to investigate direct imitation learning from human drivers for the task of lane keeping assistance in highway and country roads using grayscale images from a single front view camera.
no code implementations • 27 Mar 2017 • Luca Caltagirone, Mauro Bellone, Lennart Svensson, Mattias Wahde
The fully convolutional neural network trained using all the available sensors together with driving directions achieved the best MaxF score of 88. 13% when considering a region of interest of 60x60 meters.
1 code implementation • 13 Mar 2017 • Ángel F. García-Fernández, Jason L. Williams, Karl Granström, Lennart Svensson
We provide a derivation of the Poisson multi-Bernoulli mixture (PMBM) filter for multi-target tracking with the standard point target measurements without using probability generating functionals or functional derivatives.
no code implementations • 10 Mar 2017 • Luca Caltagirone, Samuel Scheidegger, Lennart Svensson, Mattias Wahde
The FCN is specifically designed for the task of pixel-wise semantic segmentation by combining a large receptive field with high-resolution feature maps.
1 code implementation • 26 May 2016 • Ángel F. García-Fernández, Lennart Svensson, Mark R. Morelande
We propose a solution of the multiple target tracking (MTT) problem based on sets of trajectories and the random finite set framework.
no code implementations • 24 May 2016 • Ángel F. García-Fernández, Lennart Svensson
This paper presents the probability hypothesis density (PHD) filter for sets of trajectories: the trajectory probability density (TPHD) filter.
1 code implementation • 20 May 2016 • Karl Granstrom, Maryam Fatemi, Lennart Svensson
Both the prediction and the update preserve the PMBM form of the density, and in this sense the PMBM density is a conjugate prior.
3 code implementations • 4 May 2016 • Ángel F. García-Fernández, Abu Sajana Rahmathullah, Lennart Svensson
In this paper, we propose a metric on the space of finite sets of trajectories for assessing multi-target tracking algorithms in a mathematically sound way.
3 code implementations • 21 Jan 2016 • Abu Sajana Rahmathullah, Ángel F. García-Fernández, Lennart Svensson
This paper presents the generalized optimal sub-pattern assignment (GOSPA) metric on the space of finite sets of targets.
1 code implementation • NeurIPS 2015 • Isabel Valera, Francisco Ruiz, Lennart Svensson, Fernando Perez-Cruz
We propose the infinite factorial dynamic model (iFDM), a general Bayesian nonparametric model for source separation.
no code implementations • 22 Apr 2015 • Simo Särkkä, Jouni Hartikainen, Lennart Svensson, Fredrik Sandblom
This article is concerned with Gaussian process quadratures, which are numerical integration methods based on Gaussian process regression methods, and sigma-point methods, which are used in advanced non-linear Kalman filtering and smoothing algorithms.