Can someone remind me what the technical name is for the removal of a background from a still image?
Our photographer told me years ago, but I've since forgotten and it gets embarrassing!
Depending on the context and who you're talking to, this is referred to as "keying" (also referred to as Chroma Key), "matting" (mostly video), "masking" (you'll come across "clipping mask" as a term which is interchangeable with "mask" in most cases) or extraction. These are all names for the same general technique, which is the basis of Compositing.
You might mean "background extraction".
While I think Alan probably has it,
silhouetting is an old school printer's term,
opaquing (using a red clay-like paint to mask off portions of B&W film negatives), and
vignetting all might fit the bill.
You could say "Cut out" or "Image cut out"
The phrase I was looking for is 'deep-etching'.
Thanks for all the answers, guys.
Another term could be "Isolated Image"