Wellcome / EPSRC Centre for Interventional and Surgical Sciences


Weiss Open Data Server

WEISS promotes Open Access to Research. Any WEISS datasets having no sensitive/identifiable data are hosted here and freely downloadable for evaluation and further research.

Feto Placenta Data Preview
The dataset contains 483 frames with ground-truth vessel segmentation annotations taken from six different in vivo fetoscopic procedure videos. The dataset also includes six unannotated in vivo continuous fetoscopic video clips (950 frames) with predicted vessel segmentation maps obtained from the leave-one-out cross validation reported in [Bano et al. MICCAI2020].URL[1]Fetoscopy Placenta Dataset450 MB
Synthetic Data Preview Image
The dataset consists of 14 + 6 videos of 300 frames each, with corresponding segmentation ground truth and robot kinematic data. Frames were initially recorded at 720x576 pixel resolution and then centrally cropped (538x701) to remove side camera artefacts. The employed technique to produce segmentation labels, as well as further details on our dataset, are accurately described in our [Emanuele et al. MICCAI2020].URL[2]Synthetic Dataset3.5 GB
Synthetic Colonoscopy Dataset Preview
Synthetic colonoscopy dataset consists of 16,016 RGB images with corresponding ground truth depth. The images are based on a human CTC and were generated in Unity. The depth is scaled to [0,1] which corresponds to [0,20] cm. The data is divided into groups according to its texture (T1, T2, T3) and the lighting (L1, L2, L3). For each configuration there are four to five different subsets generated by randomly shifting and rotating the virtual camera. Please see website and publication for more information. For access permissions, click contact.URL[3]Colonoscopy Dataset1.2 GB
Serv CT Preview Image
This dataset consists of 16 rectified stereoendoscopic 720 x 576 resolution images of two porcine ex vivo full torso samples. CT of both endoscope and anatomy enable constrained manual alignment producing reference disparity, depth and occlusion maps for each stereo pair. These are intended for validation of surgical stereo reconstruction algorithms. Reference to follow shortly.URL[4]SERV-CT407 MB
Semio to Brain Preview Image
Descriptive Seizure Semiologies and their multi-one-hot encoded categorical hierarchical brain localisations (11230 datapoints) and lateralisations (2391 datapoints) from 4643 patients across 309 included articles, as a Microsoft Excel Spreadsheet. doi:10.5281/zenodo.4473240URLDraftSemio2Brain735 KB
AFM liver tissue data
This dataset consists of 27 tissue samples collected from 7 patients suffering from colorectal or pancreatic cancer metastasis who underwent curative liver resection surgeryURL AFM Liver Tissue Data35 GB


  1. Bano, S., Vasconcelos, F., Shepherd, L.M., Vander Poorten, E., Vercauteren, T., Ourselin, S., David, A.L., Deprest, J. and Stoyanov, D., 2020, October. Deep placental vessel segmentation for fetoscopic mosaicking. In International Conference on Medical Image Computing and Computer-Assisted Intervention (pp. 763-773). Springer, Cham.
  2. Colleoni, E., Edwards, P. and Stoyanov, D., 2020, October. Synthetic and Real Inputs for Tool Segmentation in Robotic Surgery. In International Conference on Medical Image Computing and Computer-Assisted Intervention (pp. 700-710). Springer, Cham.
  3. Rau, A., Edwards, P.E., Ahmad, O.F., Riordan, P., Janatka, M., Lovat, L.B. and Stoyanov, D., 2019. Implicit domain adaptation with conditional generative adversarial networks for depth prediction in endoscopy. International journal of computer assisted radiology and surgery, 14(7), pp.1167-1176.
  4. Edwards, P.J., Psychogyios, D., Speidel, S., Maier-Hein, L. and Stoyanov, D., 2020. SERV-CT: A disparity dataset from CT for validation of endoscopic 3D reconstruction. arXiv preprint arXiv:2012.11779.