Search Results for author: Daniel Gehrig

Found 25 papers, 15 papers with code

An N-Point Linear Solver for Line and Motion Estimation with Event Cameras

no code implementations1 Apr 2024 Ling Gao, Daniel Gehrig, Hang Su, Davide Scaramuzza, Laurent Kneip

To recover the full linear camera velocity we fuse observations from multiple lines with a novel velocity averaging scheme that relies on a geometrically-motivated residual, and thus solves the problem more efficiently than previous schemes which minimize an algebraic residual.

Motion Estimation

End-to-end Learned Visual Odometry with Events and Frames

no code implementations18 Sep 2023 Roberto Pellerito, Marco Cannici, Daniel Gehrig, Joris Belhadj, Olivier Dubois-Matra, Massimo Casasco, Davide Scaramuzza

Visual Odometry (VO) is crucial for autonomous robotic navigation, especially in GPS-denied environments like planetary terrains.

Visual Odometry

From Chaos Comes Order: Ordering Event Representations for Object Recognition and Detection

1 code implementation ICCV 2023 Nikola Zubić, Daniel Gehrig, Mathias Gehrig, Davide Scaramuzza

However, selecting the appropriate representation for the task traditionally requires training a neural network for each representation and selecting the best one based on the validation score, which is very time-consuming.

Event-based vision object-detection +3

A Hybrid ANN-SNN Architecture for Low-Power and Low-Latency Visual Perception

no code implementations24 Mar 2023 Asude Aydin, Mathias Gehrig, Daniel Gehrig, Davide Scaramuzza

Our hybrid ANN-SNN model thus combines the best of both worlds: It does not suffer from long state transients and state decay thanks to the ANN, and can generate predictions with high temporal resolution, low latency, and low power thanks to the SNN.

3D Human Pose Estimation

Pushing the Limits of Asynchronous Graph-based Object Detection with Event Cameras

no code implementations22 Nov 2022 Daniel Gehrig, Davide Scaramuzza

A recent line of work tackles this issue by modeling events as spatiotemporally evolving graphs that can be efficiently and asynchronously processed using graph neural networks.

object-detection Object Detection

Exploring Event Camera-based Odometry for Planetary Robots

no code implementations12 Apr 2022 Florian Mahlknecht, Daniel Gehrig, Jeremy Nash, Friedrich M. Rockenbauer, Benjamin Morrell, Jeff Delaune, Davide Scaramuzza

Due to their resilience to motion blur and high robustness in low-light and high dynamic range conditions, event cameras are poised to become enabling sensors for vision-based exploration on future Mars helicopter missions.

Time Lens++: Event-based Frame Interpolation with Parametric Non-linear Flow and Multi-scale Fusion

no code implementations CVPR 2022 Stepan Tulyakov, Alfredo Bochicchio, Daniel Gehrig, Stamatios Georgoulis, Yuanyou Li, Davide Scaramuzza

Recently, video frame interpolation using a combination of frame- and event-based cameras has surpassed traditional image-based methods both in terms of performance and memory efficiency.

Motion Estimation Video Frame Interpolation

AEGNN: Asynchronous Event-based Graph Neural Networks

no code implementations CVPR 2022 Simon Schaefer, Daniel Gehrig, Davide Scaramuzza

For this reason, recent works have adopted Graph Neural Networks (GNNs), which process events as ``static" spatio-temporal graphs, which are inherently "sparse".

Are High-Resolution Event Cameras Really Needed?

no code implementations28 Mar 2022 Daniel Gehrig, Davide Scaramuzza

We provide both empirical and theoretical evidence for this claim, which indicates that high-resolution event cameras exhibit higher per-pixel event rates, leading to higher temporal noise in low-illumination conditions and at high speeds.

Image Reconstruction Optical Flow Estimation +2

ESS: Learning Event-based Semantic Segmentation from Still Images

1 code implementation18 Mar 2022 Zhaoning Sun, Nico Messikommer, Daniel Gehrig, Davide Scaramuzza

Nonetheless, semantic segmentation with event cameras is still in its infancy which is chiefly due to the lack of high-quality, labeled datasets.

Event-based Object Segmentation Segmentation +2

Multi-Bracket High Dynamic Range Imaging with Event Cameras

no code implementations13 Mar 2022 Nico Messikommer, Stamatios Georgoulis, Daniel Gehrig, Stepan Tulyakov, Julius Erbach, Alfredo Bochicchio, Yuanyou Li, Davide Scaramuzza

Modern high dynamic range (HDR) imaging pipelines align and fuse multiple low dynamic range (LDR) images captured at different exposure times.

valid Vocal Bursts Intensity Prediction

Bridging the Gap between Events and Frames through Unsupervised Domain Adaptation

1 code implementation6 Sep 2021 Nico Messikommer, Daniel Gehrig, Mathias Gehrig, Davide Scaramuzza

However, event-based vision has been held back by the shortage of labeled datasets due to the novelty of event cameras.

Event-based vision object-detection +2

E-RAFT: Dense Optical Flow from Event Cameras

1 code implementation24 Aug 2021 Mathias Gehrig, Mario Millhäusler, Daniel Gehrig, Davide Scaramuzza

Modern frame-based optical flow methods heavily rely on matching costs computed from feature correlation.

Feature Correlation Optical Flow Estimation

Time Lens: Event-Based Video Frame Interpolation

1 code implementation CVPR 2021 Stepan Tulyakov, Daniel Gehrig, Stamatios Georgoulis, Julius Erbach, Mathias Gehrig, Yuanyou Li, Davide Scaramuzza

However, while these approaches can capture non-linear motions they suffer from ghosting and perform poorly in low-texture regions with few events.

Optical Flow Estimation Video Frame Interpolation

TimeLens: Event-based Video Frame Interpolation

1 code implementation14 Jun 2021 Stepan Tulyakov, Daniel Gehrig, Stamatios Georgoulis, Julius Erbach, Mathias Gehrig, Yuanyou Li, Davide Scaramuzza

State-of-the-art frame interpolation methods generate intermediate frames by inferring object motions in the image from consecutive key-frames.

Optical Flow Estimation Video Frame Interpolation

DSEC: A Stereo Event Camera Dataset for Driving Scenarios

1 code implementation10 Mar 2021 Mathias Gehrig, Willem Aarents, Daniel Gehrig, Davide Scaramuzza

To address these challenges, we propose, DSEC, a new dataset that contains such demanding illumination conditions and provides a rich set of sensory data.

Autonomous Driving

Learning Monocular Dense Depth from Events

1 code implementation16 Oct 2020 Javier Hidalgo-Carrió, Daniel Gehrig, Davide Scaramuzza

Event cameras are novel sensors that output brightness changes in the form of a stream of asynchronous events instead of intensity frames.

Depth Estimation Depth Prediction +1

Event-based Asynchronous Sparse Convolutional Networks

1 code implementation ECCV 2020 Nico Messikommer, Daniel Gehrig, Antonio Loquercio, Davide Scaramuzza

However, these approaches discard the spatial and temporal sparsity inherent in event data at the cost of higher computational complexity and latency.

object-detection Object Detection +1

Video to Events: Recycling Video Datasets for Event Cameras

1 code implementation CVPR 2020 Daniel Gehrig, Mathias Gehrig, Javier Hidalgo-Carrió, Davide Scaramuzza

Event cameras are novel sensors that output brightness changes in the form of a stream of asynchronous "events" instead of intensity frames.

Object Recognition Semantic Segmentation

Asynchronous, Photometric Feature Tracking using Events and Frames

1 code implementation ECCV 2018 Daniel Gehrig, Henri Rebecq, Guillermo Gallego, Davide Scaramuzza

By contrast, standard cameras provide intensity measurements (frames) that do not depend on motion direction.

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