
- vajira@simula.no
Publications
2023
Journal Articles
V. Monakhov, V. Thambawita, P. Halvorsen and M. Riegler
GridHTM: Grid-Based Hierarchical Temporal Memory for Anomaly Detection in Videos
Sensors
V. Thambawita, S. Hicks, A. Storås, T. Nguyen, J. M. Andersen, O. Witczak, T. B. Haugen, H. L. Hammer, P. Halvorsen and M. Riegler
VISEM-Tracking, a human spermatozoa tracking dataset
Scientific Data
A. Storås, O. E. Andersen, S. Lockhart, R. Thielemann, F. Gnesin, V. Thambawita, S. Hicks, J. Kanters, I. Strümke, P. Halvorsen and M. Riegler
Usefulness of Heat Map Explanations for Deep-Learning-Based Electrocardiogram Analysis
Diagnostics
Proceedings, refereed
M. Riegler, V. Thambawita, A. Chatterjee, T. Nguyen, S. Hicks, V. Telle-Hansen, S. A. Pettersen, D. Johansen, R. Jain and P. Halvorsen
ScopeSense: An 8.5-Month Sport, Nutrition, and Lifestyle Lifelogging Dataset
International Conference on Multimedia Modeling (MMM)
V. Thambawita, A. Storås, S. Hicks, P. Halvorsen and M. Riegler
MLC at HECKTOR 2022: The Effect and Importance of Training Data When Analyzing Cases of Head and Neck Tumors Using Machine Learning
Head and Neck Tumor Segmentation and Outcome Prediction: Third Challenge, HECKTOR 2022, Held in Conjunction with MICCAI 2022
R. Machacek, L. Mozaffari, Z. Sepasdar, S. Parasa, P. Halvorsen, M. Riegler and V. Thambawita
Mask-conditioned latent diffusion for generating gastrointestinal polyp images
ICDAR '23: Intelligent Cross-Data Analysis and Retrieval
A. K. Pishva, V. Thambawita, J. Torresen and S. Hicks
RePolyp: A Framework for Generating Realistic Colon Polyps with Corresponding Segmentation Masks using Diffusion Models
Computer-Based Medical Systems (CBMS): 2023
T. Nguyen, A. Storås, V. Thambawita, S. Hicks, P. Halvorsen and M. Riegler
Multimedia datasets: challenges and future possibilities
International conference on multimedia modeling
2022
Book Chapters
V. Thambawita, S. Hicks, E. Jaouen, P. Halvorsen and M. Riegler
Smittestopp analytics: Analysis of position data
Smittestopp − A Case Study on Digital Contact Tracing
Journal Articles
R. Khadka, D. Jha, S. Hicks, V. Thambawita, M. Riegler, S. Ali and P. Halvorsen
Meta-learning with implicit gradients in a few-shot setting for medical image segmentation
Computers in Biology and Medicine
S. Hicks, I. Strümke, V. Thambawita, M. Hammou, M. Riegler, P. Halvorsen and S. Parasa
On evaluation metrics for medical applications of artificial intelligence
Scientific Reports
V. Thambawita, P. Salehi, S. A. Sheshkal, S. Hicks, H. L. Hammer, S. Parasa, T. de Lange, P. Halvorsen and M. Riegler
SinGAN-Seg: Synthetic training data generation for medical image segmentation
PLOS ONE
P. Salehi, S. Z. Hassan, M. Lammerse, S. S. Sabet, I. Riiser, R. K. Røed, M. S. Johnson, V. Thambawita, S. Hicks, M. Powell, M. E. Lamb, G. A. Baugerud, P. Halvorsen and M. Riegler
Synthesizing a Talking Child Avatar to Train Interviewers Working with Maltreated Children
Big Data and Cognitive Computing
A. Sharma, R. Kakulavarapu, V. Thambawita, M. Siddiqui, E. Delbarre, M. Riegler, H. L. Hammer and M. Stensen
Automating tracking of cell division for human embryo development in time lapse videos
Human Reproduction
V. Thambawita, S. Hicks, A. Storås, O. Witczak, J. M. Andersen, H. L. Hammer, P. Halvorsen, M. Riegler and H. B. Trine
Real-time deep learning based multi object tracking of spermatozoa in fresh samples
Human Reproduction
S. Hicks, V. Thambawita, A. Storås, T. B. Haugen, H. L. Hammer, P. Halvorsen, M. Riegler and M. H. Stensen
Automatic Tracking of the ICSI procedure using Deep Learning
Human Reproduction
Miscellaneous
C. Midoglu, S. Hicks, V. Thambawita, T. Kupka and P. Halvorsen
MMSys'22 Grand Challenge on AI-based Video Production for Soccer
Proceedings, refereed
A. Storås, M. Riegler, T. B. Haugen, V. Thambawita, S. Hicks, H. L. Hammer, R. Kakulavarapu, P. Halvorsen and M. Stensen
Automatic Unsupervised Clustering of Videos of the Intracytoplasmic Sperm Injection (ICSI) Procedure
NAIS: Symposium of the Norwegian AI Society
J. A. Fageren, V. Thambawita, A. Storås, S. Parasa, T. de Lange, P. Halvorsen and M. Riegler
PolypConnect: Image inpainting for generating realistic gastrointestinal tract images with polyps
IEEE 35th International Symposium on Computer-Based Medical Systems (CBMS)
T. S. Nordmo, A. B. Ovesen, B. A. Juliussen, S. Hicks, V. Thambawita, H. D. Johansen, P. Halvorsen, M. Riegler and D. Johansen
Njord: a fishing trawler dataset
Proceedings of the 13th ACM Multimedia Systems Conference (MMSYS)
A. Sharma, R. Kakulavarapu, V. Thambawita, M. Siddiqui, E. Delbarre, M. Riegler, H. L. Hammer and M. Stensen
Automating tracking of cell division for human embryo development in time lapse videos
Human Reproduction
B. Torpmann-Hagen, V. Thambawita, K. Glette, P. Halvorsen and M. Riegler
Segmentation Consistency Training: Out-of-Distribution Generalization for Medical Image Segmentation
2022 IEEE International Symposium on Multimedia (ISM)
V. Thambawita, S. Hicks, A. Storås, J. M. Andersen, O. Witczak, T. B. Haugen, H. L. Hammer, T. Nguyen, P. Halvorsen and M. Riegler
Medico Multimedia Task at MediaEval 2022: Transparent Tracking of Spermatozoa
MediaEval 2022
2021
Book Chapters
I. Strümke, S. Hicks, V. Thambawita, D. Jha, S. Parasa, M. Riegler and P. Halvorsen
Artificial Intelligence in Gastroenterology
Artificial Intelligence in Medicine
Journal Articles
D. Jha, S. Ali, S. Hicks, V. Thambawita, H. Borgli, P. H. Smedsrud, T. de Lange, K. Pogorelov, X. Wang, P. Harzig, M. Tran, W. Meng, T. Hoang, D. Dias, T. H. Ko, T. Agrawal, O. Ostroukhova, Z. Khan, M. A. Tahir, Y. Liu, Y. Chang, M. Kirkerød, D. Johansen, M. Lux, H. D. Johansen, M. Riegler and P. Halvorsen
A comprehensive analysis of classification methods in gastrointestinal endoscopy imaging
Medical Image Analysis
J. O. Valand, H. Kadragic, S. Hicks, V. Thambawita, C. Midoglu, T. Kupka, D. Johansen, M. Riegler and P. Halvorsen
AI-Based Video Clipping of Soccer Events
Machine Learning and Knowledge Extraction
O. A. N. Rongved, M. Stige, S. Hicks, V. Thambawita, C. Midoglu, E. Zouganeli, D. Johansen, M. Riegler and P. Halvorsen
Automated Event Detection and Classification in Soccer: The Potential of Using Multiple Modalities
Machine Learning and Knowledge Extraction
V. Thambawita, J. L. Isaksen, S. Hicks, J. Ghouse, G. Ahlberg, A. Linneberg, N. Grarup, C. Ellervik, M. S. Olesen, T. Hansen, C. Graff, N. Holstein-Rathlou, I. Strümke, H. L. Hammer, M. Maleckar, P. Halvorsen, M. Riegler and J. K. Kanters
DeepFake electrocardiograms: the key for open science for artificial intelligence in medicine
Scientific Reports
V. Thambawita, J. L. Isaksen, S. Hicks, J. Ghouse, G. Ahlberg, A. Linneberg, N. Grarup, C. Ellervik, M. S. Olesen, T. Hansen, C. Graff, N. Holstein-Rathlou, I. Strümke, H. L. Hammer, M. Maleckar, P. Halvorsen, M. Riegler and J. K. Kanters
DeepFake electrocardiograms using generative adversarial networks are the beginning of the end for privacy issues in medicine
Nature Scientific Reports
V. Thambawita, I. Strümke, S. Hicks, P. Halvorsen, S. Parasa and M. Riegler
Impact of Image Resolution on Deep Learning Performance in Endoscopy Image Classification: An Experimental Study Using a Large Dataset of Endoscopic Images
Diagnostics
S. Hicks, D. Jha, V. Thambawita, P. Halvorsen, B. Singstad, S. Gaur, K. Pettersen, M. Goodwin, S. Parasa, T. de Lange and M. Riegler
MedAI: Transparency in Medical Image Segmentation
Nordic Machine Intelligence
S. Hicks, J. L. Isaksen, V. Thambawita, J. Ghouse, G. Ahlberg, A. Linneberg, N. Grarup, I. Strümke, C. Ellervik, M. S. Olesen, T. Hansen, C. Graff, N. Holstein-Rathlou, P. Halvorsen, M. Maleckar, M. Riegler and J. K. Kanters
Explaining deep neural networks for knowledge discovery in electrocardiogram analysis
Scientific Reports
P. H. Smedsrud, V. Thambawita, S. Hicks, H. Gjestang, O. O. Nedrejord, E. Næss, H. Borgli, D. Jha, T. J. D. Berstad, S. L. Eskeland, M. Lux, H. Espeland, A. Petlund, D. T. D. Nguyen, E. Garcia-Ceja, D. Johansen, P. T. Schmidt, E. Toth, H. L. Hammer, T. de Lange, M. Riegler and P. Halvorsen
Kvasir-Capsule, a video capsule endoscopy dataset
Scientific Data
O. A. N. Rongved, S. Hicks, V. Thambawita, H. K. Stensland, E. Zouganeli, D. Johansen, C. Midoglu, M. Riegler and P. Halvorsen
Using 3D Convolutional Neural Networks for Real-time Detection of Soccer Events
International Journal of Semantic Computing
Proceedings, refereed
D. Jha, S. Ali, K. Emanuelsen, S. Hicks, V. Thambawita, E. Garcia-Ceja, M. Riegler, T. de Lange, P. T. Schmidt, H. D. Johansen, D. Johansen and P. Halvorsen
Kvasir-Instrument: Diagnostic and therapeutic tool segmentation dataset in gastrointestinal endoscopy
27th International Conference on Multimedia Modeling
E. Garcia-Ceja, V. Thambawita, S. Hicks, D. Jha, P. Jakobsen, H. L. Hammer, P. Halvorsen and M. Riegler
HTAD: A Home-Tasks Activities Dataset with Wrist-accelerometer and Audio Features
27th International Conference on Multimedia Modeling
V. Thambawita, T. B. Haugen, M. Stensen, O. Witczak, H. L. Hammer, P. Halvorsen and M. Riegler
Identification of spermatozoa by unsupervised learning from video data
37th Virtual Annual Meeting of the European Society of Human Reproduction and Embryology (ESHRE)
V. Thambawita, I. Strümke, S. Hicks, M. Riegler, P. Halvorsen and S. Parasa
Data Augmentation Using Generative Adversarial Networks For Creating Realistic Artificial Colon Polyp Images
DDW 2021
V. Thambawita, S. Hicks, I. Strümke, M. Riegler, P. Halvorsen and S. Parasa
Impact of Image Resolution on Convolutional Neural Networks Performance in Gastrointestinal Endoscopy
DDW 2021
V. Thambawita, S. Hicks, P. Halvorsen and M. Riegler
DivergentNets: Medical Image Segmentation by Network Ensemble
EndoCV
V. Thambawita, S. Hicks, J. Isaksen, M. H. Stensen, T. B. Haugen, J. Kanters, S. Parasa, T. de Lange, H. D. Johansen, D. Johansen, H. L. Hammer, P. Halvorsen and M. Riegler
DeepSynthBody: the beginning of the end for data deficiency in medicine
The International Conference on Applied Artificial Intelligence (ICAPAI)
G. A. Baugerud, M. S. Johnson, R. K. Røed, M. E. Lamb, M. Powell, V. Thambawita, S. Hicks, P. Salehi, S. Z. Hassan, P. Halvorsen and M. Riegler
Multimodal Virtual Avatars for Investigative Interviews with Children
Proceedings of the 2021 Workshop on Intelligent Cross-Data Analysis and Retrieval (ICDAR '21)
J. Valand, H. Kadragic, S. Hicks, V. Thambawita, C. Midoglu, T. Kupka, D. Johansen, M. Riegler and P. Halvorsen
Automated Clipping of Soccer Events using Machine Learning
IEEE International Symphosium of Multimedia (ISM)
S. Hicks, D. Jha, V. Thambawita, H. L. Hammer, T. de Lange, S. Parasa, M. Riegler and P. Halvorsen
Medico Multimedia Task at MediaEval 2021: Transparency in Medical Image Segmentation
Mediaeval Medico 2021
N. P. P. TzavaraTzavara and B. Singstad
Transfer Learning in Polyp and Endoscopic Tool Segmentation from Colonoscopy Images
Nordic Machine Intelligence
PhD Thesis
V. Thambawita
DeepSynthBody: the beginning of the end for data deficiency in medicine
Oslo Metropolitan University
2020
Journal Articles
V. Thambawita, D. Jha, H. L. Hammer, H. D. Johansen, D. Johansen, P. Halvorsen and M. Riegler
An Extensive Study on Cross-Dataset Bias and Evaluation Metrics Interpretation for Machine Learning applied to Gastrointestinal Tract Abnormality Classification
ACM Transactions on Computing for Healthcare
H. Borgli, V. Thambawita, P. H. Smedsrud, S. Hicks, D. Jha, S. L. Eskeland, K. R. Randel, K. Pogorelov, M. Lux, D. T. D. Nguyen, D. Johansen, C. Griwodz, H. K. Stensland, E. Garcia-Ceja, P. T. Schmidt, H. L. Hammer, M. Riegler, P. Halvorsen and T. de Lange
HyperKvasir, a comprehensive multi-class image and video dataset for gastrointestinal endoscopy
Scientific Data
Proceedings, refereed
H. Svoren, V. Thambawita, P. Halvorsen, P. Jakobsen, E. Garcia-Ceja, F. M. Noori, H. L. Hammer, M. Lux, M. Riegler and S. Hicks
Toadstool: A Dataset for Training Emotional IntelligentMachines Playing Super Mario Bros
The ACM Multimedia Systems Conference (MMSys)
V. Thambawita, S. Hicks, H. Borgli, H. K. Stensland, D. Jha, M. K. Svensen, S. Pettersen, D. Johansen, H. D. Johansen, S. D. Pettersen, S. Nordvang, S. Pedersen, A. Gjerdrum, T. Grønli, P. M. Fredriksen, R. Eg, K. Hansen, S. Fagernes, C. Claudi, A. Biørn-Hansen, D. T. D. Nguyen, T. Kupka, H. L. Hammer, R. Jain, M. Riegler and P. Halvorsen
PMData: a sports logging dataset
Proceedings of the 11th ACM Multimedia Systems Conference
S. Hicks, V. Thambawita, H. L. Hammer, T. B. Haugen, J. M. Andersen, O. Witczak, P. Halvorsen and M. Riegler
ACM Multimedia BioMedia 2020 Grand Challenge Overview
Proceedings of the 28th ACM International Conference on Multimedia
O. A. N. Rongved, S. Hicks, V. Thambawita, H. K. Stensland, E. Zouganeli, D. Johansen, M. Riegler and P. Halvorsen
Real-Time Detection of Events in Soccer Videos using 3D Convolutional Neural Networks
2020 IEEE International Symposium on Multimedia (ISM)
S. Hicks, D. Jha, V. Thambawita, P. Halvorsen, H. L. Hammer and M. Riegler
The EndoTect 2020 Challenge: Evaluation and Comparison of Classification, Segmentation and Inference Time for Endoscopy
25th International Conference on Pattern Recognition (ICPR)
V. Thambawita, S. Hicks, P. Halvorsen and M. Riegler
Pyramid-Focus-Augmentation: Medical Image Segmentation with Step-Wise Focus
MediaEval 2020
O. O. Nedrejord, V. Thambawita, S. Hicks, P. Halvorsen and M. Riegler
Vid2Pix - A Framework for Generating High-Quality Synthetic Videos
2020 IEEE International Symposium on Multimedia (ISM)
P. Jakobsen, E. Garcia-Ceja, L. A. Stabell, K. J. Oedegaard, J. O. Berle, V. Thambawita, S. Hicks, P. Halvorsen, O. B. Fasmer and M. Riegler
PSYKOSE: A Motor Activity Database of Patients with Schizophrenia
2020 IEEE 33rd International Symposium on Computer-Based Medical Systems (CBMS)
D. Jha, S. Ali, K. Emanuelsen, S. Hicks, V. Thambawita, E. Garcia-Ceja, M. Riegler, T. de Lange, P. T. Schmidt, H. D. Johansen, D. Johansen and P. Halvorsen
Kvasir-instrument: Diagnostic and therapeutic tool segmentation dataset in gastrointestinal endoscopy
International Conference on Multimedia Modeling
2019
Journal Articles
S. Hicks, J. M. Andersen, O. Witczak, V. Thambawita, P. Halvorsen, H. L. Hammer, T. B. Haugen and M. Riegler
Machine Learning-Based Analysis of Sperm Videos and Participant Data for Male Fertility Prediction
Nature Scientific Reports
Proceedings, refereed
M. Kirkerød, R. Borgli, H. Borgli, V. Thambawita, S. Hicks, M. Riegler and P. Halvorsen
Unsupervised Preprocessing to Improve Generalisation for Medical Image Classification
IEEE 13th International Symposium on Medical Information and Communication Technology (ISMICT)
V. Thambawita, H. L. Hammer, M. Riegler and P. Halvorsen
GANEx: A complete pipeline of training, inference and benchmarking GAN experiments
2019 International Conference on Content-Based Multimedia Indexing (CBMI)
V. Thambawita, P. Halvorsen, H. L. Hammer, M. Riegler and T. B. Haugen
Stacked dense optical flows and dropout layers to predict sperm motility and morphology
MediaEval 2019, 27-29 October 2019, Sophia Antipolis, France
V. Thambawita, P. Halvorsen, H. L. Hammer, M. Riegler and T. B. Haugen
Extracting temporal features into a spatial domain using autoencoders for sperm video analysis
MediaEval 2019
2018
Proceedings, refereed
V. Thambawita and D. Jha
The Medico-Task 2018: Disease Detection in the Gastrointestinal Tract using Global Features and Deep Learning
MediaEval 2018
M. Kirkerød, V. Thambawita, M. Riegler and P. Halvorsen
Using preprocessing as a tool in medical image detection
MediaEval 2018