A technique used to select all or part of an image in order to include it in another image or document.
silhouetting 1. Drawing of the outlines of objects; filled in with some uniform color. 2. Creating outlines of solid objects; such as, those cast by their shadows. 3. Making projections on a background; such as, on a screen showing silhouettes. 4. Representing an object with a silhouette.
Masking or image blocking to isolate an image from the background.