Search Results for author: Christoffer Petersson

Found 17 papers, 12 papers with code

NeuroNCAP: Photorealistic Closed-loop Safety Testing for Autonomous Driving

2 code implementations11 Apr 2024 William Ljungbergh, Adam Tonderski, Joakim Johnander, Holger Caesar, Kalle Åström, Michael Felsberg, Christoffer Petersson

We present a versatile NeRF-based simulator for testing autonomous driving (AD) software systems, designed with a focus on sensor-realistic closed-loop evaluation and the creation of safety-critical scenarios.

Autonomous Driving

Are NeRFs ready for autonomous driving? Towards closing the real-to-simulation gap

no code implementations24 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.

Autonomous Driving Data Augmentation +2

You can have your ensemble and run it too -- Deep Ensembles Spread Over Time

no code implementations20 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.

Autonomous Driving Out-of-Distribution Detection

HEAL-SWIN: A Vision Transformer On The Sphere

1 code implementation14 Jul 2023 Oscar Carlsson, Jan E. Gerken, Hampus Linander, Heiner Spieß, Fredrik Ohlsson, Christoffer Petersson, Daniel Persson

High-resolution wide-angle fisheye images are becoming more and more important for robotics applications such as autonomous driving.

Autonomous Driving Semantic Segmentation

Raw or Cooked? Object Detection on RAW Images

no code implementations21 Jan 2023 William Ljungbergh, Joakim Johnander, Christoffer Petersson, Michael Felsberg

Images fed to a deep neural network have in general undergone several handcrafted image signal processing (ISP) operations, all of which have been optimized to produce visually pleasing images.

Object object-detection +1

LidarCLIP or: How I Learned to Talk to Point Clouds

1 code implementation13 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.

Image Generation Retrieval +1

Masked Autoencoder for Self-Supervised Pre-training on Lidar Point Clouds

1 code implementation1 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.

3D Object Detection object-detection +1

Real-time semantic segmentation on FPGAs for autonomous vehicles with hls4ml

no code implementations16 May 2022 Nicolò Ghielmetti, Vladimir Loncar, Maurizio Pierini, Marcel Roed, Sioni Summers, Thea Aarrestad, Christoffer Petersson, Hampus Linander, Jennifer Ngadiuba, Kelvin Lin, Philip Harris

In this paper, we investigate how field programmable gate arrays can serve as hardware accelerators for real-time semantic segmentation tasks relevant for autonomous driving.

Autonomous Driving Quantization +1

Future Object Detection with Spatiotemporal Transformers

1 code implementation21 Apr 2022 Adam Tonderski, Joakim Johnander, Christoffer Petersson, Kalle Åström

In order to make accurate predictions about the future, it is necessary to capture the dynamics in the scene, both object motion and the movement of the ego-camera.

Object object-detection +1

Object Detection as Probabilistic Set Prediction

1 code implementation15 Mar 2022 Georg Hess, Christoffer Petersson, Lennart Svensson

Accurate uncertainty estimates are essential for deploying deep object detectors in safety-critical systems.

Object object-detection +1

Equivariance versus Augmentation for Spherical Images

1 code implementation8 Feb 2022 Jan E. Gerken, Oscar Carlsson, Hampus Linander, Fredrik Ohlsson, Christoffer Petersson, Daniel Persson

We compare the performance of the group equivariant networks known as S2CNNs and standard non-equivariant CNNs trained with an increasing amount of data augmentation.

Data Augmentation Image Classification +1

Geometric Deep Learning and Equivariant Neural Networks

no code implementations28 May 2021 Jan E. Gerken, Jimmy Aronsson, Oscar Carlsson, Hampus Linander, Fredrik Ohlsson, Christoffer Petersson, Daniel Persson

We also discuss group equivariant neural networks for homogeneous spaces $\mathcal{M}=G/K$, which are instead equivariant with respect to the global symmetry $G$ on $\mathcal{M}$.

object-detection Object Detection +1

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