Chapter Six- Graphics, Digital Media, Multimedia

Chapter Six- Graphics, Digital Media, Multimedia - Chapter...

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Chapter Six: Graphics, Digital Media, and Multimedia  Focus on Computer Graphics o Painting: Bitmapped Graphics Pixels: tiny dots of white, black, or color arranged in rows The words, numbers, and pictures we see on the computer display are nothing  more than patterns of pixels created by software Automatic graphics: when you press the  e  key, the software constructs a  pattern that appears on the screen as an  e   Convenient, but restrictive  Painting Software: enables you to pain pixels on the screen with a pointing  device  Typically the program accepts input from a mouse, joystick, trackball,  touch pad, or stylus, translating the pointer movements into lines and  patterns on-screen  Usually offers a palette of tools on screen  Some mimic real world patenting tools  Create bitmapped graphics (raster graphics) Gray-scale graphics: allow each pixel to appear as black, white, or one of  several shades of gray A program that assigns 8 bits per pixel allows up to 256 different  shades of gray to appear on the screen  Realistic color graphics require more memory  Color depth (bit depth): the number of bits devoted to each pixel  Technological factors limiting an artist’s ability to creating realistic on  screen images with a bitmapped graphics program Resolution: the density of the pixels (dots per inch) Technological factors limiting an artist’s ability to creating realistic on  screen images with a bitmapped graphics program Painting programs get around the jaggies by allowing you to store an image  at 300 dots per inch or higher Demand more memory and disk space  o Image Processing: Photographic Editing by Computer  A digital photo is a bitmapped image  Image Processing Software enables the photographer to manipulate digital  photos and other high-resolution images with tools similar to those found in  paint programs  Photo-management software simplify and automate common tasks associated  with capturing, organizing, editing, and sharing digital images 
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o Drawing: Object-Oriented Graphics  Drawing software stores a picture not as a collection of dogs, but as a  collection of lines and shapes  Because pictures are collections of lines, shapes, and other objects this  approach is often called “object oriented graphics” or “vector graphics” PostScript- a standard page description language for describing text fongs,  illustrations, and other elements of the printed page  Built into ROM in many laser printers 
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