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Sebastien Ourselin

7 accepted papers

2023

SKiT: a Fast Key Information Video Transformer for Online Surgical Phase Recognition

ICCV 2023poster

This paper introduces SKiT, a fast Key information Transformer for phase recognition of videos. Unlike previous methods that rely on complex models to capture long-term temporal information, SKiT accurately recognizes high-level stages of videos using an efficient key pooling operation. This operati…

Cited by 36PDFcodeScholar
2019

Robotic Control of a Multi-Modal Rigid Endoscope Combining Optical Imaging with All-Optical Ultrasound

ICRA 2019poster

Fetoscopy is a technically challenging surgery, due to the dynamic environment and low diameter endoscopes often resulting in a limited field of view. In this paper, we report on the design and operation of a robotic multimodal endoscope with optical ultrasound and white light stereo camera. The man…

Cited by 12SourceScholar
2019

Stochastic Filter Groups for Multi-Task CNNs: Learning Specialist and Generalist Convolution Kernels

ICCV 2019oral

The performance of multi-task learning in Convolutional Neural Networks (CNNs) hinges on the design of feature sharing between tasks within the architecture. The number of possible sharing patterns are combinatorial in the depth of the network and the number of tasks, and thus hand-crafting an archi…

Cited by 104PDFScholar
2018

Requirements Based Design and End-to-End Dynamic Modeling of a Robotic Tool for Vitreoretinal Surgery

ICRA 2018poster

Despite several robots having been proposed for vitreoretinal surgery, there is limited information on their dynamic modeling. This gap leads to sub-optimal motor selection and hinders the application of advanced control schemes that would fulfill the goal of micro-precise surgery. This paper presen…

Cited by 13SourceScholar
2017

Body wall force sensor for simulated minimally invasive surgery: Application to fetal surgery

IROS 2017poster

Surgical interventions are increasingly executed minimal invasively. Surgeons insert instruments through tiny incisions in the body and pivot slender instruments to treat organs or tissue below the surface. While a blessing for patients, surgeons need to pay extra attention to overcome the fulcrum e…

Cited by 5SourceScholar
2017

Corner-Based Geometric Calibration of Multi-Focus Plenoptic Cameras

ICCV 2017poster

We propose a method for geometric calibration of multi-focus plenoptic cameras using raw images. Multi-focus plenoptic cameras feature several types of micro-lenses spatially aligned in front of the camera sensor to generate micro-images at different magnifications. This multi-lens arrangement provi…

Cited by 33PDFcodeScholar
2017

Refractive Structure-From-Motion Through a Flat Refractive Interface

ICCV 2017poster

Recovering 3D scene geometry from underwater images involves the Refractive Structure-from-Motion (RSfM) problem, where the image distortions caused by light refraction at the interface between different propagation media invalidates the single view point assumption. Direct use of the pinhole camera…

Cited by 34PDFScholar