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Topic in Short:
We all know that the motion picture is a lie. But then what is that movement on screen? It is nothing but a bunch of still images projected continuously.
These still images are nothing but frames. When the moving picture is displayed, each frame is flashed on a screen for a short time (nowadays, usually 1/24, 1/25 or 1/30 of a second) and then immediately replaced by the next one. Persistence of vision blends the frames together, producing the illusion of a moving image. So if its 24fps then the image is flashed on the screen for 1/24 and so on.
How does the human eye perceive the motion picture?
The human eye is capable of differentiating between 10 and 12 still images per second before it starts just seeing it as motion. That is, at an FPS of 12 or less, your brain can tell that it’s just a bunch of still images in rapid succession, not a seamless animation. Once the frame rate goes up to around 18 to 26 FPS, the motion effect actually takes place and your brain is fooled into thinking that these individual images are actually a moving scene.
If a frame rate is too slow, motion looks jagged, but if it’s too fast it seems to be realistic but you can have problems too. They might give u a soap opera effect which I will discuss in detail about lower and higher FPS as we go by.
So this is what a motion picture and the way we receive it.
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