Support open images in omero web client

[oeway]

This feature is proposed by Claire on image.sc: https://forum.image.sc/t/open-an-image-from-omero-in-imagej-js/47747

As explained by @will-moore the web client doesn't support raw pixel access, but we can still obtain the rendered images for some application. I think that's relatively easy to support.

Basically, in the web client every image has an image id, and use that id we can obtain the rendered image.

For example here: http://idr.openmicroscopy.org/webclient/?show=project-1501 If we inspect on the thumbnail image, we can obtain an image id like this: id="image-96765", we can take the number 96765, and convert it into an image URL: http://idr.openmicroscopy.org/webgateway/render_image/96765/0/0/

Previously, this URL won't work in ImageJ.JS because it has no file extension, but I just submitted a PR to fix it by inferring the file extension from HTTP header: imjoy-team/imagej.js#51

So now this will work: https://ij.imjoy.io/?open=http://idr.openmicroscopy.org/webgateway/render_image/96765/0/0/

What do you think @mutterer ? I guess we should also consider supporting different omero sites other than openmicroscopy.org.

[DrKenHo-crick]

Hi @oeway, the link above opening the idr image, it doesn't seem to work anymore.
A different version of imagej.js is required?

[oeway]

Hi, it's not working yet.

I will copy my answer from image.sc:

The root cause I believe is that omero server doesn’t provide a http interface for accessing the raw pixel.
However, if you can make changes to the OMERO server, experimental support can be enabled. Basically, I think you will need to install https://github.com/ome/omero-ms-zarr and https://github.com/will-moore/omero-imjoy in the OMERO server.