Computer Science 1033A/B Lecture Notes - Lecture 4: Raster Graphics, Display Resolution, Cmyk Color Model

• School: Western University
• Department: Computer Science
• Course: Computer Science 1033A/B
• Professor: idk

Document Summary

Graphics: common screen resolutions: 640x640, 600x800, 1024x768 (most common), 1280x1024. Less pixels = larger images/textt, less fits on screenmore pixels= smaller text/image, more on screen: amount of screen a picture takes up depends on: size of picture, screen resolution, not dpi, average pixels/dots per inch is 72ppi. Large file sizes will take a long time to download when on a webpage. 1 bit = 2 colours, 2 bits = 4 colours, 4 bits = 16 colours: subtractive model - cmyk. Used for printing, refers to ink on a page. Primary colours are cyan, magenta, yellow and black. When ink is applied, it removes the white (paper colour: additive model - rgb. adding light to a black background (the monitor) Primary colours are red, green and blue: true colour: 256 shades of red x 256 shades of green x 256 shades of blue. 3 bytes are needed for true colour (1 for each colour)