Sharing image from other apps unto my app

When a user shares an image to my app from another app, I want to receive it as an image and handle it.

I've already set up filters like this:

Now what I don't understand is how to actually receive the intent in my app nor how I could extract/handle an image from it.

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I've tried googling the problem but no one seems to give a concrete answer on how to handle/receive the intent after setting up the filter.

I appreciate the help!