What is the process of keying out a color in a video clip called?

• A. Chroma keying
• B. Green screen editing
• C. Rotoscoping
• D. Masking

Answer: (A)

Chroma keying is the process of removing a specific color from a video so you can replace the background with something else. It targets a color range (usually bright green or blue) and makes those pixels transparent, allowing the new background to show through. This works best with a uniform backdrop, even lighting, and minimal color spill onto the subject; you typically adjust the key’s similarity or tolerance and edge softness to clean up edges and reduce halos. The term green screen editing refers to the overall setup and workflow of shooting against a green screen and compositing later, not the actual color removal step. Rotoscoping is a frame-by-frame technique to isolate a subject by painting a manual mask when keying isn’t feasible, while masking creates a shape to reveal or hide parts of the image, which can be used in conjunction with keying but isn’t the color-removal process itself.