imagemask
nounUK /ˈɪmɪdʒmɑːsk/
US /ˈɪmɪdʒmæsk/
A picture that hides part of another picture so only some parts show.
The artist used an imagemask to make the stars shine through the dark sky.
OTHER MEANINGS
2. A tool in computer programs that lets you show or hide parts of a picture.
She added an imagemask in the app to fade the edges of the photo.
3. A shape used to block light or color so it only appears in certain areas.
The printer used an imagemask to put the logo only on the left side.
4. A way to protect parts of a picture while changing the rest.
With an imagemask, he changed the background color but kept the face the same.