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



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