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Walk cycles can be broken up into four key frames: the forward contact point, the first passing pose, the back contact point, and the second passing pose. Frames that are drawn between these key poses (traditionally known as in-betweens) are either hand-drawn or interpolated using computer software. Key frames of a walk cycle
These motions must have their walk cycle key frames aligned, so that at a given generic time, both motions make a forward point contact. [ 1 ] For a neutral walking motion that is neither (or equally) happy or sad, the corresponding degrees of freedom for the existing motions are used for interpolation.
[1] Also, in methods of rendering where vertices move from position to position in-between frames, a distortion is created that does not happen when using skeletal animation. This is described by critics of the technique as looking "shaky" [citation needed]. On the other hand, this distortion may be part of the desired "look".
In video compression, a key frame, also known as an intra-frame, is a frame in which a complete image is stored in the data stream. In video compression, only changes that occur from one frame to the next are stored in the data stream, in order to greatly reduce the amount of information that must be stored.
Three patients whose lower bodies were left completely paralyzed after spinal cord injuries were able to walk, cycle and swim using a nerve-stimulation device controlled by a touchscreen tablet ...
Frames 2–4 are smear frames, those being elongated inbetweens. In animation, a smear frame is a frame used to simulate motion blur. Smear frames are used in between key frames. [1] This animation technique has been used since the 1940s. [1] Smear frames are used to stylistically visualize fast movement along a path of motion. [2] [3] [4]
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