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In animation and filmmaking, a key frame (or keyframe) is a drawing or shot that defines the starting and ending points of a smooth transition. These are called frames because their position in time is measured in frames on a strip of film or on a digital video editing timeline.
This process mimics that used in early cartoon films. Master animators would draw key frames of the film, then, junior animators would draw the in-between frames. This is called inbetweening or tweening and the overall process is called "key frame animation". To make these motions appear realistic, interpolation algorithms have been sought ...
It's is the one responsible for the transformation of the prepared 3D scene into a 2D image or animation. 3D render engines can be based on different methods, such as ray-tracing, rasterization, path-tracing, also depending on the speed and the outcome expected, it comes in different types – real-time and non real-time, which was described above
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 ...
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.
However, in general, the term computer animation refers to dynamic images that do not allow user interaction, and the term virtual world is used for the interactive animated environments. Computer animation is essentially a digital successor to the art of stop motion animation of 3D models and frame-by-frame animation of 2D illustrations.
In filmmaking, video production, animation, and related fields, a frame is one of the many still images which compose the complete moving picture. The term is derived from the historical development of film stock , in which the sequentially recorded single images look like a framed picture when examined individually.
Onion skin of frame 7 of this image showing previous 3 frames. In 2D computer graphics, onion skinning is a technique used in creating animated cartoons and editing films to view several frames at once. This way, the animator or editor can make decisions on how to create or change an image based on the previous image in the sequence.