|
Created by Sally_Tisdall.020101
almost 10 years ago
|
|
Question | Answer |
Metadata | Data about data |
Colour Depth | Colour depth is the number of alternative colours that a pixel can use. Measured in bits , the number of bits indicates how many colours are available for each pixel. For example 1 but gives 2 colours , white and black . |
Raster graphics | Also known as pixelmaps or bitmap graphics , are commonly used in digital cameras and are organised as a grid of coloured squares called pixels . |
Vector graphics or images | Uses shapes to precisely define the parts of the image. .It is more efficient than bitmaps because it does not need to store every pixel as a bitmap does. Vector images can be changed without losing resolution. |
Bitmap graphics | Also known as pixelmaps or raster graphics , are commonly used in digital cameras and are organised as a grid of coloured squares called pixels . |
Resolution | Resolution is a measure of how many pixels are used in a given area. They tell you how dense (and therefore how detailed ) an image is .It is measured in dots per inch (dpi). |
Pixel | An individual unit (often called a dot) that makes up an image . |
Unicode | A worldwide encoding system used with different languages in which each letter, digit, or symbol is given a unique numeric value that applies across different platforms and programs. |
ASCII code | (American Standard Code for Information Interchange) Is the most common format for text files in computers and on the Internet . |
Parity Checking | The use of parity bits to check that data has been transmitted accurately. The parity bit is added to every data unit (usually seven or eight bits ) that are transmitted. |
Want to create your own Flashcards for free with GoConqr? Learn more.