In computer vision and video processing, ghost frames (or phantom frames) are synthetic frames inserted between real frames to increase apparent frame rate and smooth motion. They are typically generated via interpolation techniques by analyzing motion between existing frames and predicting intermediate frames. For instance, using optical flow (estimating per-pixel motion), one can warp and blend content from frame t and frame t+1 to create a plausible frame at t+0.5. The result is smoother video playback on high frame rate displays or converting movies to higher FPS. However, if done poorly, ghost frames can introduce artifacts or “ghosting” (hence the name) where interpolated objects appear translucent or with doubled edges. Ghost frames are not physically captured but algorithmically generated, and are one technique in motion-compensated frame rate up-conversion commonly used in modern TVs.
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