Persistence of visionThis is the pattern of still images which are only slightly different are spun after each other to give
the illusion to the brain that things are moving. The eyes as though they are seeing an afterimage for
1/25 of a second, this is used within animation because it causes the brain to see flickers of images
when its only photographers of slight movements. This form is still accepted term for this
phenomenon in cinema history and theory. The audience still will interpret motion at rates as low as
ten frames per second or slower. To reduce the appearance of flicker, all modern projector shutters
are designed to an additional flicker period, which makes it less visible to the human eye.
Frame ratesWhen animating there has to be a control of the time and how it is divided up to make sure it runs
smoothly together. Each form has its very own frame, say a video for a broadcast on television has a
frame rate of around 30 to 25 frames per second, this is the make sure that the viewers are able to
see the movement clear enough to not look like photographs. Depending on how long the
sequences of film is, the animator would have to judge the amount of frames that would have to be
taken, it takes a lot of time but becomes worth it in the final production.
stop frameThis is the action of taking the image, and each image changes only slightly between the frames. This
makes it look as realistic as possible, and allows the animator to make any developments they wish
within the frames which makes it more creative and can go down different story paths.
Movement of ModelsThis is how the model seems to be moving, but only with changing slight movements to give the
illusion. This has to be done very accurately otherwise it will not look realistic.