Can I use meteor to read/write metadata to/from a jpeg image?
Haven’t tried it, but an npm-module like piexifs could help. It’s the first module I found, there might be other/better ones.
Server-side should be pretty easy, as you have file-access. Once you have the image serverside( upload or specify an URL and GET),use a Meteor.call() to start the process.
Client-side probably similar, but you have to handle the image as data-blobs.