CSci 105

Introduction to Computers

Lecture 14

© Morris Firebaugh



I. Introduction

A. Conclude Chapter 4: INPUT AND OUTPUT

B. Output: Information for the User

C. Computer Graphics

D. Ethics and Data

 


II. Conclude Chapter 4: INPUT AND OUTPUT


Brief History of Computer Output


III. Classifications of Computer Output


Computer Screens

Three classes of Computer Screen Technology


Principle of CRTs

F = 60.15 Hz = full screen refresh frequency (scan rate)

d = dot pitch = 1/72 inch = distance between pixels, horizontally and vertically,

M = 307,200 pixels needed for a singlescreen image

 


Printers


Two broad printer classes


Impact printers

Non-Impact Printers

Epson Stylus InkJet Printer (720 dpi)









LaserMaster 1000 Laser Printer

  • Thermal Transfer (Wax)

  • Fargo Primera Thermal Wax
    and Dye Sublimation Printer

    Price range runs from $99 to $50,000

     


    Voice Output

     


    Music Output

     


    IV. Computer Graphics

    For more details on Computer Graphics, see your instructor's text

    COMPUTER GRAPHICS - Tools for Visualization, Wm. C. Brown Publisher (1993)

    Seeing and Understanding


    Computer graphics provides potent tools for seeing, and hence understanding, objects of interest. Remember as a child when the light bulb of understanding suddenly flashed on in your mind and you exclaimed "I see!"? In order to truly understand objects, whether they are abstract mathematical functions or intriguing artistic designs, it is tremendously important to see them. Computer graphics allows us to accomplish this visualization.

    Visualization involves cognitive functions such as recognition, learning, and memory. It is the basis for the concept of "the mind's eye," an abstract mental representation of our physical experience. Theclearer we visualize an object in our mind's eye, the more effectively we can relate to it and ultimately understand it. Our own visual system is the shortest path to the mind's eye.

    The Mandelbrot Set

     

    Table and Vase (using Swivel3D)

     

    Office.MWF Virtual Reality Scene using Virtus WalkThrough

     


    V. Ethics and Data

     




     

    Updated February 26, 2001