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Frame rate, most commonly expressed in frame/s, frames per second or FPS, is typically the frequency (rate) at which consecutive images are captured or displayed. This definition applies to film and video cameras , computer animation , and motion capture systems.
This gif animation shows a rudimentary comparison of how motion varies with 4 Hz, 12 Hz, and 24 Hz refresh rates. Entire sequence has a frame rate of 24 Hz. [6] The development of televisions in the 1930s was determined by a number of technical limitations. The AC power line frequency was used for the vertical refresh rate for two reasons. The ...
If the frame rate falls below the flicker fusion threshold for the given viewing conditions, flicker will be apparent to the observer, and movements of objects on the film will appear jerky. For the purposes of presenting moving images, the human flicker fusion threshold is usually taken between 60 and 90 Hz, though in certain cases it can be ...
Comparison of a slow down video without interframe interpolation (left) and with motion interpolation (right) Motion interpolation or motion-compensated frame interpolation (MCFI) is a form of video processing in which intermediate film, video or animation frames are generated between existing ones by means of interpolation, in an attempt to make animation more fluid, to compensate for display ...
Computer animation is essentially a digital successor to stop motion techniques, but using 3D models, and traditional animation techniques using frame-by-frame animation of 2D illustrations. For 2D figure animations, separate objects (illustrations) and separate transparent layers are used with or without that virtual skeleton.
Frame frequency often varies depending on animation style and is an artistic choice. Animation "on twos" has been used for over 100 years; Fantasmagorie (1908), widely considered the first fully animated movie, was animated on twos. Modern animation uses various techniques to adapt frame rates. Slow movements may be animated on threes or fours.
Decompression (sometimes compression) frame time uniformity – Big differences in this value can cause annoyingly jerky playback. SIMD support by processor and codec – e.g., MMX , SSE , SSE2 , each of which changes CPU performance on some kinds of tasks (often including those with which codecs are concerned).
In moving picture (TV) the number of frames scanned per second is known as the frame rate. The higher the frame rate, the better the sense of motion. But again, increasing the frame rate introduces technical difficulties. So the frame rate is fixed at 25 or 29.97 . To increase the sense of motion it is customary to scan the very same frame in ...