1
Video in the Modern World
Video began as a purely analog technology. Successive images were captured on film streaming through the camera. The movie was played by using flashes of light to illuminate each frame on the moving film, at rates sufficient to show continual motion. Flicker, however, was easily seen.
An improved system for early broadcast television utilized the luminance (or light intensity) information represented as an analog signal. To transmit an image, the luminance information was sent in successive horizontal scans. Sufficient horizontal scans built up a two-dimensional image. Televisions and monitors used cathode ray guns that shot a stream of electrons to excite a phosphorus-coated screen. The slowly fading phosphorus tended ...
Get Digital Video Processing for Engineers now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
