Tuesday 14 June 2011

The Persistence of Vision and Frame Rates!!!!
















What is the Persistence of Vision and How does it Work?

The Persistence of Vision is how the human eye see's moving image. This means the human eye see's a rapid succession of moving image and the images are retained in the brain. For a fraction of a second the images from before are with the images to what images the eye is seeing now.. The images will then blend and this will result into the image being the eye and mind being 'tricked' to thinking the image is moving like an optical illusion. For example, say if you had a bird on a piece of paper on one side and you had a cage on the other with string attached to both sides and you spin it at a certain speed, the bird looks like it is in the cage but it isn't. With anything that is filmed on camera the principle of Persistence of Vision will always be there because its the eye working to see the moving image. Frame rates have a big impact on the Peristence of Vision as well because if the frame rate isn't right it could look to slow and jumpy or too fast and not understandable.
What are Frame Rates and How do they work?

Frame rates are the main key to getting great quality animations as well  as films and tv shows. You always need to consider the frame rate setting, because it affects how smoothly your animation plays. For example, an animation set to 12 frames per second (fps) plays 12 frames (images) each second. If the frame rate is set to 24 fps (frames per second), the animation appears to animate more smoothly than if it ran at 12 fps. However, your animation at 24 fps also plays faster than it does at 12 fps, so the total duration (in seconds) is shorter. Therefore, to make a 5‑second animation using a higher frame rate, you must add additional frames to fill those five seconds than at a lower frame rate. In animation there is a specific technique to help create more fluid movement and this is known as '2's'. It means each movement is recorded twice.

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