VISA 110 Lecture Notes - Lecture 1: Emulsion, Grayscale, Computer Monitor
Document Summary
Raster images- bit-map image, an organized grid of pixels(comprised of bit info) that make an image. Each and every individual pixel contains specific info, and when arranged in their particular order, it creates a highly detailed, photographic image. Analog- uses film, emulsion on a plastic surface. The emulsion is comprised of thousands of light sensitive silver halide salts that rise to the surface when activated by light coming through the lens. Digital- uses a ccd- charge-couple device- a chip inside the camera. It converts lights coming through the lens into electrons, then records these into pixels. Pixels- are the building blocks of an image. They are (mostly) square and stack horizontally and vertically to form a grid. When stacked (or built) in their particular order, it creates and image. Each pixel contains important info to the creation of an image. The ccd of a digital camera captures this info.
