Is there a way render multiple images of type image.ome-zarr as spatial layers?

[esiefkas]

I'm looking for a setup similar to this example (http://vitessce.io/#?dataset=neumann-2020), where each image is a separate spatial layer. It's very clear how to accomplish this with the image.raster.json type, which allows you to specify a list of images and associated URLs, but that's limited to ome-tiff and bioformats-zarr data types. I'd like to accomplish the same thing but with ome-zarr and haven't had much luck.

I've tried adding both images to my list of files like so:

...
files: [
        {
          name: "Image1",
          fileType: "image.ome-zarr",
          url: "https://my-favorite.zarr",
        },
        {
          name: "Image2",
          fileType: "image.ome-zarr",
          url: "https://my-second-favorite.zarr",
        },
      ],
...

But this just results in rendering the last image in the array. Is there a bit of config I'm missing? or will this require a custom plugin?

[keller-mark]

Hi @esiefkas,

Apologies that this is not clear. There is currently not a way to render multiple image.ome-zarr in the same spatial view.

For background, for a while now I have been working to refactor how the imaging and spatial data are handled in Vitessce (#830). The ultimate goal is to unblock many features that are on the roadmap, including those implemented in the quick-and-dirty implementation/demo linked in #1399.

When implementing the support for image.ome-zarr I did not bother updating image.raster.json, with the intention that this would be superseded by a future different mechanism for configuring visualizations with multiple images. I have been slowly making progress towards this, but it is taking longer than expected.

In the meantime, I will need to work on a way to unblock this use case of loading multiple image.ome-zarr images (prior to completely addressing #830). I have identified a solution and started a draft pull request at #1504 and will aim to include this in the next release of Vitessce.