Search Results for author: Christos Bergeles

Found 7 papers, 4 papers with code

Multi-scale and Cross-scale Contrastive Learning for Semantic Segmentation

no code implementations25 Mar 2022 Theodoros Pissas, Claudio S. Ravasio, Lyndon Da Cruz, Christos Bergeles

We apply contrastive learning to enhance the discriminative power of the multi-scale features extracted by semantic segmentation networks.

Contrastive Learning Semantic Segmentation

Homography-based Visual Servoing with Remote Center of Motion for Semi-autonomous Robotic Endoscope Manipulation

1 code implementation25 Oct 2021 Martin Huber, John Bason Mitchell, Ross Henry, Sébastien Ourselin, Tom Vercauteren, Christos Bergeles

Our approach allows a surgeon to build a graph of desired views, from which, once built, views can be manually selected and automatically servoed to irrespective of robot-patient frame transformation changes.

Frame Image Registration

Deep Homography Estimation in Dynamic Surgical Scenes for Laparoscopic Camera Motion Extraction

1 code implementation30 Sep 2021 Martin Huber, Sébastien Ourselin, Christos Bergeles, Tom Vercauteren

We perform an extensive evaluation of state-of-the-art (SOTA) Deep Neural Networks (DNNs) across multiple compute regimes, finding our method transfers from our camera motion free da Vinci surgery dataset to videos of laparoscopic interventions, outperforming classical homography estimation approaches in both, precision by 41%, and runtime on a CPU by 43%.

Homography Estimation Imitation Learning +1

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