5

Video, Film and Pictures

Tim Amyes

In order to fully understand the post production process, a basic knowledge of picture recording and operations is necessary, and in this chapter we look at the technology behind video recording and shooting on film.

Moving images, whether they be stored on film or videotape, are nothing more than a series of stationary pictures, each slightly different from the previous one and each capturing a successive movement in time. When these pictures are shown or projected at speed, the brain interprets them as continuous motion, a phenomenon known as persistence of vision.

It takes approximately 1/20th of a second to visually register a change in an image. When the images change at greater speeds than this, we ...

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