Search Results for author: Kristof Van Laerhoven

Found 13 papers, 7 papers with code

Temporal Action Localization for Inertial-based Human Activity Recognition

no code implementations27 Nov 2023 Marius Bock, Michael Moeller, Kristof Van Laerhoven

Our results show that state-of-the-art TAL models are able to outperform popular inertial models on 4 out of 6 wearable activity recognition benchmark datasets, with improvements ranging as much as 25% in F1-score.

Human Activity Recognition Temporal Action Localization +1

Do predictability factors towards signing avatars hold across cultures?

no code implementations5 Jul 2023 Abdelhadi Soudi, Manal El Hakkaoui, Kristof Van Laerhoven

Extrinsic factors include users technology experience, their hearing status, age and their sign language fluency.

Hang-Time HAR: A Benchmark Dataset for Basketball Activity Recognition using Wrist-Worn Inertial Sensors

1 code implementation22 May 2023 Alexander Hoelzemann, Julia Lee Romero, Marius Bock, Kristof Van Laerhoven, Qin Lv

We present a benchmark dataset for evaluating physical human activity recognition methods from wrist-worn sensors, for the specific setting of basketball training, drills, and games.

Human Activity Recognition Time Series

A Matter of Annotation: An Empirical Study on In Situ and Self-Recall Activity Annotations from Wearable Sensors

1 code implementation15 May 2023 Alexander Hoelzemann, Kristof Van Laerhoven

Furthermore, we discuss the advantages and disadvantages of the methods compared in our study, the biases they may could introduce and the consequences of their usage on human activity recognition studies and as well as possible solutions.

Human Activity Recognition

WEAR: An Outdoor Sports Dataset for Wearable and Egocentric Activity Recognition

1 code implementation11 Apr 2023 Marius Bock, Hilde Kuehne, Kristof Van Laerhoven, Michael Moeller

Though research has shown the complementarity of camera- and inertial-based data, datasets which offer both egocentric video and inertial-based sensor data remain scarce.

Egocentric Activity Recognition Human Activity Recognition +2

An Embedded and Real-Time Pupil Detection Pipeline

1 code implementation27 Feb 2023 Ankur Raj, Diwas Bhattarai, Kristof Van Laerhoven

For evaluation on our hardware-specific camera frames, we also contribute a dataset of 35000 images, from 20 participants.

Pupil Detection

Using Multivariate Linear Regression for Biochemical Oxygen Demand Prediction in Waste Water

no code implementations8 Sep 2022 Isaiah K. Mutai, Kristof Van Laerhoven, Nancy W. Karuri, Robert K. Tewo

The performance indices for the input variables of Dissolved Oxygen, Nitrogen, Fecal Coliform and Total Coliform in prediction of BOD are: RMSE=6. 77mg/L, r=0. 60 and accuracy 70. 3% for training dataset of 80% and RMSE=6. 74mg/L, r=0. 60 and accuracy of 87. 5% for training set of 90% of the dataset.

regression

Tutorial on Deep Learning for Human Activity Recognition

1 code implementation13 Oct 2021 Marius Bock, Alexander Hoelzemann, Michael Moeller, Kristof Van Laerhoven

Activity recognition systems that are capable of estimating human activities from wearable inertial sensors have come a long way in the past decades.

Feature Engineering Human Activity Recognition

Detecting Handwritten Mathematical Terms with Sensor Based Data

no code implementations12 Sep 2021 Lukas Wegmeth, Alexander Hoelzemann, Kristof Van Laerhoven

The second classifier is a Deep Neural Network that combines convolution layers with recurrent layers to predict windows with a single label, out of the 15 possible classes, at an F1 score of >60%.

Time Series Time Series Analysis

Transformer Networks for Data Augmentation of Human Physical Activity Recognition

2 code implementations2 Sep 2021 Sandeep Ramachandra, Alexander Hoelzemann, Kristof Van Laerhoven

It improves generalization and reduces amount of annotated human activity data needed for training which reduces labour and time needed with the dataset.

Data Augmentation Human Activity Recognition +2

Improving Deep Learning for HAR with shallow LSTMs

1 code implementation2 Aug 2021 Marius Bock, Alexander Hoelzemann, Michael Moeller, Kristof Van Laerhoven

Recent studies in Human Activity Recognition (HAR) have shown that Deep Learning methods are able to outperform classical Machine Learning algorithms.

Human Activity Recognition

On-site Online Feature Selection for Classification of Switchgear Actuations

no code implementations28 May 2021 Christina Nicolaou, Ahmad Mansour, Kristof Van Laerhoven

Process- and design-specific features can be learned locally (e. g. on a sensor system) without the need of prior offline training.

Classification feature selection

Deep PPG: Large-Scale Heart Rate Estimation with Convolutional Neural Networks

no code implementations Sensors 2019 Attila Reiss, Ina Indlekofer, Philip Schmidt, Kristof Van Laerhoven

We show that on large datasets the deep learning model significantly outperforms other methods: The mean absolute error could be reduced by 31% on the new dataset PPG-DaLiA, and by 21% on the dataset WESAD.

Heart rate estimation

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