---
tags: NGFF
---

# IDR-NGFF 2021-W01+02

## 2021-01-11

* Will:
- received word from Trevor. Need time to look at it.
- started looking into 3d-sampling, but nothing to show yet.
* Josh:
- no word from https://github.com/Kitware/itk-vtk-viewer/issues/315
- for discussion on Tuesday: likely to ramp up more on the light sheet front after prod92 in time for the end of July trainings, then can go back to prod93

## 2021-01-06

* "lightsheet" epic:
- Goal: have one or more (idr0101, idr0044, etc.) large 3D volumes converted and usable.
- Minimal spec changes: voxel size, scale information in Zarr
- Main issue: Sub-resolutions in Z, chunking in Z
- Multiple chunkings versus fixing subresolutions in Z?
- Re-using the base resolution?
- Simon: downsampling T? Seb: seen no downsampling need
- 3D client(s)?
- [Kitware example](https://kitware.github.io/itk-vtk-viewer/app/?fileToLoad=https://thewtex.github.io/allen-ccf-itk-vtk-zarr/average_template_50_chunked.zarr)
- J-M: I tried it at the end of last year with our example from S3, it did not load, either S3 issue or our zarr file.
- https://github.com/Kitware/itk-vtk-viewer/pull/343
- https://github.com/Kitware/itk-vtk-viewer/issues/315
- https://github.com/Kitware/itk-vtk-viewer/issues/176
- MoBIE / BDV? (ome-zarr-java?) - demo Jan 29th.
- Others
- napari - open PRs to make 3D work?
- https://github.com/napari/napari/pull/323
- neuroglancer
- viv (2D)
- fpbioimage
- Performance
- Nested zarrs (ZarrV3?, consolidated?)
- ZarrReader & native s3 imports (for converted data)
- Import original (e.g. BDV, KLB, IMS), OME-TIFF, and OME-Zarr and compare performance. eg idr0101 data
* AOB
- J-m: zarr_implementations repo is failing. See one open PR.
- download from S3 using Rust faster than go.
- Will: looking at Vitesse for displaying OME-Zarr data
- They contributed some fixes. Not using rendering settings. (Not setup to do that)
- Discussion about their multiple repositories.
- Do we focus on ome-zarr-js and ome-zarr-java?