Frame averaging is also known as?

• A. Frame averaging
• B. Persistence
• C. Temporal smoothing
• D. Pixel averaging

Answer: (B)

Frame averaging works by blending multiple consecutive frames to reduce random noise over time. This temporal integration makes information from earlier frames persist into the current image, smoothing out rapid fluctuations and creating a steadier view.

That lasting influence of past frames is why the technique is described as persistence: the signal "persists" across time through averaging. It’s a specific way of temporal smoothing, where the emphasis is on how long the past frames continue to affect the present image. Note that pixel averaging would refer to averaging within a single frame’s pixels, not across frames, and temporal smoothing is the broader idea—but the term used in this context is persistence.