Chapter 14 working with graphics
Download
1 / 15

Chapter 14 - PowerPoint PPT Presentation


  • 372 Views
  • Updated On :

Chapter 14 Working with Graphics Getting Started In this Chapter, you will learn: About different graphics you can work with on your PC When to use bitmap graphics Which format to use When to use vector graphics How to create 3-D graphics About Hardware: Digitizing devices

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Chapter 14' - jacob


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Chapter 14 working with graphics l.jpg

Chapter 14Working with Graphics


Getting started l.jpg
Getting Started

  • In this Chapter, you will learn:

    • About different graphics you can work with on your PC

    • When to use bitmap graphics

    • Which format to use

    • When to use vector graphics

    • How to create 3-D graphics

    • About Hardware: Digitizing devices

Practical PC 5th Edition Chapter 14


What kinds of graphics can i work with on my pc l.jpg
What kinds of graphics can I work with on my PC?

  • Pictures that you can create, modify, download, and transmit using your PC are referred to as graphics or images

  • You can obtain ready-made images

    • Clip art and stock photo collections

    • Pictures scanned from books or magazines

  • You can use photos from your own collection or your digital camera

  • You will typically work with two types of graphics: vector and bitmap

Practical PC 5th Edition Chapter 14


What kinds of graphics can i work with on my pc4 l.jpg
What kinds of graphics can I work with on my PC?

Practical PC 5th Edition Chapter 14


When should i use bitmap graphics l.jpg
When should I use bitmap graphics?

  • Bitmap graphics, sometimes called raster graphics, represent an image as a grid of colored dots

    • Photograph-like images used for photos and Web page images

    • Stored as BMP, TIFF, GIF, PNG and JPEG

    • Manipulate the image using paint software

  • Quality depends on resolution and color depth

    • Resolution is the width and height of the grid that holds the dots and each dot is assigned a color code

    • Color depth is the number of bits required to store the color number. The more colors, the more storage space needed

      • 1-bit color depth produces a black and white image

      • 8 bit color depth produces 256 colors

      • 24-bit color depth produces 16.7 million colors, sometimes referred to as true color

Practical PC 5th Edition Chapter 14


How do i know what format to use l.jpg
How do I know what format to use?

  • File format depends on how you plan to use it

    • For printed publications, use a format that retains a high resolution and 24-bit color depth

    • For the Web or e-mail attachments, you can use more compact formats

  • To reduce file size

    • Shrink the physical dimensions of the image

    • Use compression techniques

    • Reduce the color depth

  • Rules of thumb

    • JPEG format offers the best quality in the smallest file size

    • For diagrams, logos, screenshots, and images containing text, use PNG format

    • GIF works best for logos and images that contain solid blocks of color or a limited range of colors

Practical PC 5th Edition Chapter 14


When should i use vector graphics l.jpg
When should I use vector graphics?

  • Vector graphics consist of a set of geometrical shapes

    • Each shape is defined as a series of line segments called vectors

    • Vector graphics are ideal for diagrams, line drawings, and computer-aided design (CAD)

  • Vector graphics resemble line drawings more than photographs

    • File size tends to be small since shapes can be stored efficiently

    • Graphics can shrink or expand with no loss of quality

    • You can modify each shape in a vector graphic independently

  • Vector graphics are often saved as EPS, WMF, or CAD formats

  • Drawing software provides tools to create and manipulate vector graphics

Practical PC 5th Edition Chapter 14


How do i create 3 d graphics l.jpg
How do I create 3-D graphics?

  • 3-D graphics contain objects that appear three-dimensional

    • 3-D objects have the data necessary to display, rotate, and view from any angle

    • 3-D objects are composed of vectors and are created using same drawing and CAD software that produces 2-D graphics

  • To create a 3-D object

    • Produce a wire frame or a line drawing outlining every surface of the object

    • Render the object by applying texture, transparency, and color to its surface

    • Your PC automatically determines where to put highlights and shadows using a process called ray tracing

    • Rendered 3-D graphics have a new-car-brochure look that is sometimes referred to as “super-realistic”

Practical PC 5th Edition Chapter 14


How do i create 3 d graphics9 l.jpg
How do I create 3-D graphics?

Creating a 3-D graphic

Practical PC 5th Edition Chapter 14


Hardware digitizing devices l.jpg
Hardware: Digitizing devices

  • Digitizing converts an image into a series of 1s and 0s that your PC can store and display

  • Digitizing devices allow you to convert real objects, such as a photo, into a digital format

  • Graphics tablet

    • Works like an electronic canvas

    • Use a pen-shaped stylus to “paint”

    • Some graphics software does not support the use of a graphics tablet

    • Connects to USB port

    • Cost from U.S. $70 to $500+

Practical PC 5th Edition Chapter 14


Hardware digitizing devices11 l.jpg
Hardware: Digitizing devices

  • Scanner

    • Reads text, images, and bar codes

    • Typically used for flat objects such as photos

    • Flatbed scanners are the most popular and resemble small photocopiers

    • Connects to USB port

    • Basic unit costs about U.S. $49

    • Bundled with software

      • Scanning software allows you to preview a scan, select a resolution, and initiate a scan from your PC

      • OCR (optical character recognition) software allows you to convert an image into a text file

Practical PC 5th Edition Chapter 14


Hardware digitizing devices12 l.jpg
Hardware: Digitizing devices

  • Digital camera

    • Takes photos and stores them as bitmap images

    • Connects to USB port

    • Can also insert memory card from camera into PC

    • Transferred images are stored on your PC

    • Camera prices depend on resolution measured in megapixels. A basic camera costs under U.S. $200 and mid-range cameras cost $200-$1000

    • You can open files using paint or photo editing software

Practical PC 5th Edition Chapter 14


Hardware digitizing devices13 l.jpg
Hardware: Digitizing devices

Graphics Tablet

Scanner

Practical PC 5th Edition Chapter 14


Shoes ufos and forrest gump l.jpg
Shoes, UFOs, and Forrest Gump?

  • What do you think?

    • In your opinion, should photos and videotapes be allowed as evidence in civil and criminal trials?

    • Do you think that it would be possible for someone to use doctored photos and videotapes to convince people that a fake event took place?

    • Do you have a set of criteria for judging the authenticity of newspaper and TV images?

Practical PC 5th Edition Chapter 14


Chapter summary l.jpg
Chapter Summary

  • You should now know:

    • About the kinds of graphics you can work with on your PC

    • Know when to use bitmap graphics

    • Know what format to use

    • Know when to use vector graphics

    • How to create 3-D graphics

    • About digitizing devices

Practical PC 5th Edition Chapter 14


ad