Search Results for author: Alexander Hermans

Found 22 papers, 15 papers with code

UGainS: Uncertainty Guided Anomaly Instance Segmentation

no code implementations3 Aug 2023 Alexey Nekrasov, Alexander Hermans, Lars Kuhnert, Bastian Leibe

Our approach centers on an out-of-distribution segmentation model for identifying uncertain regions and a strong generalist segmentation model for anomaly instances segmentation.

Autonomous Driving Instance Segmentation +2

DynaMITe: Dynamic Query Bootstrapping for Multi-object Interactive Segmentation Transformer

no code implementations ICCV 2023 Amit Kumar Rana, Sabarinath Mahadevan, Alexander Hermans, Bastian Leibe

We introduce a more efficient approach, called DynaMITe, in which we represent user interactions as spatio-temporal queries to a Transformer decoder with a potential to segment multiple object instances in a single iteration.

Instance Segmentation Interactive Segmentation +2

Point2Vec for Self-Supervised Representation Learning on Point Clouds

1 code implementation29 Mar 2023 Karim Abou Zeid, Jonas Schult, Alexander Hermans, Bastian Leibe

Recently, the self-supervised learning framework data2vec has shown inspiring performance for various modalities using a masked student-teacher approach.

3D Part Segmentation Few-Shot 3D Point Cloud Classification +3

TarViS: A Unified Approach for Target-based Video Segmentation

1 code implementation CVPR 2023 Ali Athar, Alexander Hermans, Jonathon Luiten, Deva Ramanan, Bastian Leibe

A single TarViS model can be trained jointly on a collection of datasets spanning different tasks, and can hot-swap between tasks during inference without any task-specific retraining.

Ranked #2 on Video Panoptic Segmentation on KITTI-STEP (using extra training data)

Instance Segmentation Segmentation +4

Learning 3D Human Pose Estimation from Dozens of Datasets using a Geometry-Aware Autoencoder to Bridge Between Skeleton Formats

1 code implementation29 Dec 2022 István Sárándi, Alexander Hermans, Bastian Leibe

Our approach scales to an extreme multi-dataset regime, where we use 28 3D human pose datasets to supervise one model, which outperforms prior work on a range of benchmarks, including the challenging 3D Poses in the Wild (3DPW) dataset.

3D Human Pose Estimation Dimensionality Reduction

Mask3D: Mask Transformer for 3D Semantic Instance Segmentation

1 code implementation6 Oct 2022 Jonas Schult, Francis Engelmann, Alexander Hermans, Or Litany, Siyu Tang, Bastian Leibe

Modern 3D semantic instance segmentation approaches predominantly rely on specialized voting mechanisms followed by carefully designed geometric clustering techniques.

3D Instance Segmentation 3D Semantic Instance Segmentation +1

Global Hierarchical Attention for 3D Point Cloud Analysis

no code implementations7 Aug 2022 Dan Jia, Alexander Hermans, Bastian Leibe

For the 3D object detection task, GHA improves the CenterPoint baseline by +0. 5% mAP on the nuScenes dataset, and the 3DETR baseline by +2. 1% mAP25 and +1. 5% mAP50 on ScanNet.

3D Object Detection Inductive Bias +2

Differentiable Soft-Masked Attention

1 code implementation1 Jun 2022 Ali Athar, Jonathon Luiten, Alexander Hermans, Deva Ramanan, Bastian Leibe

Recently, "Masked Attention" was proposed in which a given object representation only attends to those image pixel features for which the segmentation mask of that object is active.

Object Segmentation +4

HODOR: High-level Object Descriptors for Object Re-segmentation in Video Learned from Static Images

1 code implementation CVPR 2022 Ali Athar, Jonathon Luiten, Alexander Hermans, Deva Ramanan, Bastian Leibe

Existing state-of-the-art methods for Video Object Segmentation (VOS) learn low-level pixel-to-pixel correspondences between frames to propagate object masks across video.

Object Semantic Segmentation +2

2D vs. 3D LiDAR-based Person Detection on Mobile Robots

no code implementations21 Jun 2021 Dan Jia, Alexander Hermans, Bastian Leibe

Person detection is a crucial task for mobile robots navigating in human-populated environments.

Human Detection

Self-Supervised Person Detection in 2D Range Data using a Calibrated Camera

1 code implementation16 Dec 2020 Dan Jia, Mats Steinweg, Alexander Hermans, Bastian Leibe

Through experiments on the JackRabbot dataset with two detector models, DROW3 and DR-SPAAM, we show that self-supervised detectors, trained or fine-tuned with pseudo-labels, outperform detectors trained only on a different dataset.

Human Detection

DR-SPAAM: A Spatial-Attention and Auto-regressive Model for Person Detection in 2D Range Data

2 code implementations29 Apr 2020 Dan Jia, Alexander Hermans, Bastian Leibe

Detecting persons using a 2D LiDAR is a challenging task due to the low information content of 2D range data.

Human Detection

Visual Person Understanding through Multi-Task and Multi-Dataset Learning

no code implementations7 Jun 2019 Kilian Pfeiffer, Alexander Hermans, István Sárándi, Mark Weber, Bastian Leibe

We address the problem of learning a single model for person re-identification, attribute classification, body part segmentation, and pose estimation.

Attribute General Classification +3

Deep Person Detection in 2D Range Data

1 code implementation6 Apr 2018 Lucas Beyer, Alexander Hermans, Timm Linder, Kai O. Arras, Bastian Leibe

Detecting humans is a key skill for mobile robots and intelligent vehicles in a large variety of applications.

Human Detection

Exploring Spatial Context for 3D Semantic Segmentation of Point Clouds

1 code implementation5 Feb 2018 Francis Engelmann, Theodora Kontogianni, Alexander Hermans, Bastian Leibe

The recently proposed PointNet architecture presents an interesting step ahead in that it can operate on unstructured point clouds, achieving encouraging segmentation results.

3D Semantic Segmentation Segmentation

In Defense of the Triplet Loss for Person Re-Identification

31 code implementations22 Mar 2017 Alexander Hermans, Lucas Beyer, Bastian Leibe

In the past few years, the field of computer vision has gone through a revolution fueled mainly by the advent of large datasets and the adoption of deep convolutional neural networks for end-to-end learning.

Ranked #3 on Person Re-Identification on CUHK03 (Rank-5 metric)

General Classification Metric Learning +1

Superpixels: An Evaluation of the State-of-the-Art

2 code implementations6 Dec 2016 David Stutz, Alexander Hermans, Bastian Leibe

As such, and due to their quick adoption in a wide range of applications, appropriate benchmarks are crucial for algorithm selection and comparison.

Superpixels

DROW: Real-Time Deep Learning based Wheelchair Detection in 2D Range Data

no code implementations8 Mar 2016 Lucas Beyer, Alexander Hermans, Bastian Leibe

We propose a Convolutional Neural Network (CNN) based detector for this task.

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