Fuse multiple images into Conglomerate image components

[PaulHax]

To view multiple overlapping images at once: load an array of input images and "fuse" their components into a single vtkImageData in updateRenderedImage(). Can pass an array of images to createViewer

itkVtkViewer.createViewer({
   images: [imageUrlA, imageUrlB]
})

Or give comma separated list of images addresses to the url parameter http://localhost:8082/?image=test-data/HeadMRVolume.nrrd,test-data/HeadMRVolumeLabels.nrrd

Also, to support 4 components, up from 3, stop ImageMapper from generating mip-maps.

BREAKING CHANGE: readFiles() no longer returns { image: MultiscaleSpatialImage, ... } Instead returns { images: MultiscaleSpatialImage[], ... }. Also readFiles() no longer reads the image paramter, it reads images like so readFiles({ images: [imageUrlA, imageUrlB] })

[oeway]

Maybe related to this, do you think we can have an ImJoy api to allow add image to the viewer?

[PaulHax]

Maybe related to this, do you think we can have an ImJoy api to allow add image to the viewer?

Looks like setImage() is wired up for ImJoy. Kind of separate thing if that has issues.

[PaulHax]

Interesting test case with 27 components: http://localhost:8082/?image=https://uk1s3.embassy.ebi.ac.uk/idr/zarr/v0.4/idr0054A/5025551.zarr

[thewtex]

Interesting test case with 27 components:

Add to test suite?

[github-actions[bot]]

:tada: This PR is included in version 14.0.0 :tada:

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• npm package (@latest dist-tag)
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