Can one see a black hole? Can one see a black hole on earth?

If a black hole does not emit light, how can one take a picture of the black hole itself?

There's some discussion that the image composed by the Event Horizons Telescope is really just an accretion disk. To "take an image" of something, you need the light reflecting off of the surface of the object within frame. The "light" in the image is really just color-mapped ...
Can one see a black hole on earth?
I think, that's a bit semantics, and a question of what do you call 'I see something': If you see the shadow cast by an object on a bright background - do you see the object? Do you see Mercury or Venus when it passes in front of the disk of our sun? Similarly, if you look an object through an atomic force microscope - do you see the object, or do you just see some force indicator giving a value?

So yes, in this general sense, you see something when you have an instrument to detect it which allows to deduce properties of the object. So you also can see an object when you just see its shape in front of a bright background like a black hole within its accretion disk - even when all light you see comes from the latter.