Search Results for author: Alina Roitberg

Found 29 papers, 22 papers with code

Skeleton-Based Human Action Recognition with Noisy Labels

1 code implementation15 Mar 2024 Yi Xu, Kunyu Peng, Di Wen, Ruiping Liu, Junwei Zheng, Yufan Chen, Jiaming Zhang, Alina Roitberg, Kailun Yang, Rainer Stiefelhagen

In this study, we bridge this gap by implementing a framework that augments well-established skeleton-based human action recognition methods with label-denoising strategies from various research areas to serve as the initial benchmark.

Action Recognition Denoising +3

Navigating Open Set Scenarios for Skeleton-based Action Recognition

1 code implementation11 Dec 2023 Kunyu Peng, Cheng Yin, Junwei Zheng, Ruiping Liu, David Schneider, Jiaming Zhang, Kailun Yang, M. Saquib Sarfraz, Rainer Stiefelhagen, Alina Roitberg

In real-world scenarios, human actions often fall outside the distribution of training data, making it crucial for models to recognize known actions and reject unknown ones.

Novelty Detection Open Set Action Recognition +3

Quantized Distillation: Optimizing Driver Activity Recognition Models for Resource-Constrained Environments

1 code implementation10 Nov 2023 Calvin Tanama, Kunyu Peng, Zdravko Marinov, Rainer Stiefelhagen, Alina Roitberg

The framework enhances 3D MobileNet, a neural architecture optimized for speed in video classification, by incorporating knowledge distillation and model quantization to balance model accuracy and computational efficiency.

Activity Recognition Autonomous Driving +4

Elevating Skeleton-Based Action Recognition with Efficient Multi-Modality Self-Supervision

1 code implementation21 Sep 2023 Yiping Wei, Kunyu Peng, Alina Roitberg, Jiaming Zhang, Junwei Zheng, Ruiping Liu, Yufan Chen, Kailun Yang, Rainer Stiefelhagen

These works overlooked the differences in performance among modalities, which led to the propagation of erroneous knowledge between modalities while only three fundamental modalities, i. e., joints, bones, and motions are used, hence no additional modalities are explored.

Action Recognition Knowledge Distillation +3

RelaMiX: Exploring Few-Shot Adaptation in Video-based Action Recognition

2 code implementations15 May 2023 Kunyu Peng, Di Wen, David Schneider, Jiaming Zhang, Kailun Yang, M. Saquib Sarfraz, Rainer Stiefelhagen, Alina Roitberg

Domain adaptation is essential for activity recognition to ensure accurate and robust performance across diverse environments, sensor types, and data sources.

Action Recognition Unsupervised Domain Adaptation

FishDreamer: Towards Fisheye Semantic Completion via Unified Image Outpainting and Segmentation

1 code implementation24 Mar 2023 Hao Shi, Yu Li, Kailun Yang, Jiaming Zhang, Kunyu Peng, Alina Roitberg, Yaozu Ye, Huajian Ni, Kaiwei Wang, Rainer Stiefelhagen

This paper raises the new task of Fisheye Semantic Completion (FSC), where dense texture, structure, and semantics of a fisheye image are inferred even beyond the sensor field-of-view (FoV).

Image Outpainting Semantic Segmentation

MuscleMap: Towards Video-based Activated Muscle Group Estimation in the Wild

1 code implementation2 Mar 2023 Kunyu Peng, David Schneider, Alina Roitberg, Kailun Yang, Jiaming Zhang, Chen Deng, Kaiyu Zhang, M. Saquib Sarfraz, Rainer Stiefelhagen

In this paper, we tackle the new task of video-based Activated Muscle Group Estimation (AMGE) aiming at identifying active muscle regions during physical activity in the wild.

Human Activity Recognition Knowledge Distillation +1

ModSelect: Automatic Modality Selection for Synthetic-to-Real Domain Generalization

no code implementations19 Aug 2022 Zdravko Marinov, Alina Roitberg, David Schneider, Rainer Stiefelhagen

Modality selection is an important step when designing multimodal systems, especially in the case of cross-domain activity recognition as certain modalities are more robust to domain shift than others.

Cross-Domain Activity Recognition Domain Generalization

Multimodal Generation of Novel Action Appearances for Synthetic-to-Real Recognition of Activities of Daily Living

1 code implementation3 Aug 2022 Zdravko Marinov, David Schneider, Alina Roitberg, Rainer Stiefelhagen

We tackle this challenge and introduce an activity domain generation framework which creates novel ADL appearances (novel domains) from different existing activity modalities (source domains) inferred from video training data.

Activity Recognition multimodal generation +1

Multi-modal Depression Estimation based on Sub-attentional Fusion

1 code implementation13 Jul 2022 Ping-Cheng Wei, Kunyu Peng, Alina Roitberg, Kailun Yang, Jiaming Zhang, Rainer Stiefelhagen

Failure to timely diagnose and effectively treat depression leads to over 280 million people suffering from this psychological disorder worldwide.

A Comparative Analysis of Decision-Level Fusion for Multimodal Driver Behaviour Understanding

no code implementations10 Apr 2022 Alina Roitberg, Kunyu Peng, Zdravko Marinov, Constantin Seibold, David Schneider, Rainer Stiefelhagen

Visual recognition inside the vehicle cabin leads to safer driving and more intuitive human-vehicle interaction but such systems face substantial obstacles as they need to capture different granularities of driver behaviour while dealing with highly limited body visibility and changing illumination.

Is my Driver Observation Model Overconfident? Input-guided Calibration Networks for Reliable and Interpretable Confidence Estimates

no code implementations10 Apr 2022 Alina Roitberg, Kunyu Peng, David Schneider, Kailun Yang, Marios Koulakis, Manuel Martinez, Rainer Stiefelhagen

In this work, we for the first time examine how well the confidence values of modern driver observation models indeed match the probability of the correct outcome and show that raw neural network-based approaches tend to significantly overestimate their prediction quality.

Action Recognition Image Classification

TransDARC: Transformer-based Driver Activity Recognition with Latent Space Feature Calibration

1 code implementation2 Mar 2022 Kunyu Peng, Alina Roitberg, Kailun Yang, Jiaming Zhang, Rainer Stiefelhagen

This module operates in the latent feature-space enriching and diversifying the training set at feature-level in order to improve generalization to novel data appearances, (e. g., sensor changes) and general feature quality.

Human Activity Recognition

TransKD: Transformer Knowledge Distillation for Efficient Semantic Segmentation

2 code implementations27 Feb 2022 Ruiping Liu, Kailun Yang, Alina Roitberg, Jiaming Zhang, Kunyu Peng, Huayao Liu, Yaonan Wang, Rainer Stiefelhagen

Semantic segmentation benchmarks in the realm of autonomous driving are dominated by large pre-trained transformers, yet their widespread adoption is impeded by substantial computational costs and prolonged training durations.

Autonomous Driving Knowledge Distillation +3

Delving Deep into One-Shot Skeleton-based Action Recognition with Diverse Occlusions

2 code implementations23 Feb 2022 Kunyu Peng, Alina Roitberg, Kailun Yang, Jiaming Zhang, Rainer Stiefelhagen

Yet, the research of data-scarce recognition from skeleton sequences, such as one-shot action recognition, does not explicitly consider occlusions despite their everyday pervasiveness.

Action Classification Action Recognition +2

Should I take a walk? Estimating Energy Expenditure from Video Data

1 code implementation1 Feb 2022 Kunyu Peng, Alina Roitberg, Kailun Yang, Jiaming Zhang, Rainer Stiefelhagen

To study this underresearched task, we introduce Vid2Burn -- an omni-source benchmark for estimating caloric expenditure from video data featuring both, high- and low-intensity activities for which we derive energy expenditure annotations based on models established in medical literature.

Video Recognition

Affect-DML: Context-Aware One-Shot Recognition of Human Affect using Deep Metric Learning

1 code implementation30 Nov 2021 Kunyu Peng, Alina Roitberg, David Schneider, Marios Koulakis, Kailun Yang, Rainer Stiefelhagen

Human affect recognition is a well-established research area with numerous applications, e. g., in psychological care, but existing methods assume that all emotions-of-interest are given a priori as annotated training examples.

Emotion Recognition Metric Learning +1

Transfer beyond the Field of View: Dense Panoramic Semantic Segmentation via Unsupervised Domain Adaptation

1 code implementation21 Oct 2021 Jiaming Zhang, Chaoxiang Ma, Kailun Yang, Alina Roitberg, Kunyu Peng, Rainer Stiefelhagen

We look at this problem from the perspective of domain adaptation and bring panoramic semantic segmentation to a setting, where labelled training data originates from a different distribution of conventional pinhole camera images.

Ranked #7 on Semantic Segmentation on DensePASS (using extra training data)

Autonomous Vehicles Segmentation +2

DensePASS: Dense Panoramic Semantic Segmentation via Unsupervised Domain Adaptation with Attention-Augmented Context Exchange

1 code implementation13 Aug 2021 Chaoxiang Ma, Jiaming Zhang, Kailun Yang, Alina Roitberg, Rainer Stiefelhagen

First, we formalize the task of unsupervised domain adaptation for panoramic semantic segmentation, where a network trained on labelled examples from the source domain of pinhole camera data is deployed in a different target domain of panoramic images, for which no labels are available.

Segmentation Semantic Segmentation +1

Let's Play for Action: Recognizing Activities of Daily Living by Learning from Life Simulation Video Games

1 code implementation12 Jul 2021 Alina Roitberg, David Schneider, Aulia Djamal, Constantin Seibold, Simon Reiß, Rainer Stiefelhagen

Recognizing Activities of Daily Living (ADL) is a vital process for intelligent assistive robots, but collecting large annotated datasets requires time-consuming temporal labeling and raises privacy concerns, e. g., if the data is collected in a real household.

Action Classification Activity Recognition +2

MASS: Multi-Attentional Semantic Segmentation of LiDAR Data for Dense Top-View Understanding

1 code implementation1 Jul 2021 Kunyu Peng, Juncong Fei, Kailun Yang, Alina Roitberg, Jiaming Zhang, Frank Bieder, Philipp Heidenreich, Christoph Stiller, Rainer Stiefelhagen

At the heart of all automated driving systems is the ability to sense the surroundings, e. g., through semantic segmentation of LiDAR sequences, which experienced a remarkable progress due to the release of large datasets such as SemanticKITTI and nuScenes-LidarSeg.

3D Object Detection Graph Attention +4

Uncertainty-sensitive Activity Recognition: a Reliability Benchmark and the CARING Models

no code implementations2 Jan 2021 Alina Roitberg, Monica Haurilet, Manuel Martinez, Rainer Stiefelhagen

While temperature scaling alone drastically improves the reliability of the confidence values, our CARING method consistently leads to the best uncertainty estimates in all benchmark settings.

Action Recognition Image Classification

Informed Democracy: Voting-based Novelty Detection for Action Recognition

no code implementations30 Oct 2018 Alina Roitberg, Ziad Al-Halah, Rainer Stiefelhagen

While it is common in activity recognition to assume a closed-set setting, i. e. test samples are always of training categories, this assumption is impractical in a real-world scenario.

Action Classification Action Recognition +2

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