Images and Sound

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Images and Sound
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What is the Old Saying?
thousand words

• A picture is worth a ________________?
• If you create web sites, make PowerPoint
  presentations, publish newsletters, etc. it is
  critical that you use high quality images to
  illustrate what you are communicating!

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Four Primary Methods for Obtaining Images
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Digital Cameras

• Makes your project personalized and localized
• Can take photos that you might not be able to
  find any other place
• Can have breaking news displayed in a manner of
  minutes.
• Can fix bad photos with software

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Scanners

• Useful for capturing historical images, slides,
  existing photographs, etc.
• Quality scanners are relatively inexpensive.
• Some require no external power and plug into the
  USB port (great for library research)
• With appropriate software, one can also capture
  printed text in an editable file.

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Clip Art on CDs

• There are several commercial clip art collections
  on CDs. These are primarily illustrations and
  drawings, with some photographs.
• Click Art
• Art Explosion

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Clip Art on CDs

• The file formats are not always compatible with
  the web. Thus they might be used more for
  PowerPoint and Word projects.
• You can purchase a 500,000 image product for less
  than 50 at places like Best Buys, Office Depot,
  etc.

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A Word about File Formats

• Not all graphic images can be used on the web.
• JPG and GIF are the two files that absolutely
  work on the web.
• JPG is typically a photograph
• GIF is often a drawing but could be a photograph
• GIF files are typically much smaller than JPG
  files because they are limited on the number of
  colors in an image they save
• Other files such PNG and BMP might work but be
  cautious

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World Wide Web

• There are numerous sources of images on the Web.
• Typically one right clicks on a web image and
  chooses save as or copy depending upon what
  you are doing.
• If you are inserting images into PowerPoint or
  Word, you can copy
• If you want to use the graphic in a web page, you
  should save it to your computer.

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Google

• You can search Google for images
• http//images.google.com/
• Using Google is a quick and easy way to find an
  image quickly as long as you just need something
  to illustrate a point. If you want to find a
  perfect picture, you may need to check out the
  other sites.

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Google

• If you are searching for a photograph you could
  help the search by including jpg to indicate
  you are looking for a photo.
• Cow jpg
• If searching for a clip art, include gif in the
  search
• Cow gif

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USDA

• The USDA has free high quality photos
• http//www.usda.gov/oc/photo/opclibra.htm
• A new section of 4-H photos has recently been
  added.

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Farm Photos

• One can find farm photos at
• http//www.farmphoto.com/homestead/forum.asp
• This site has a variety of agricultural images
  grouped by categories
• Quality varies greatly

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Free General Photos

• www.freefoto.com
• A variety of pretty good images

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Professional Stock Photos

• www.comstock.com
• I love this site. The photographs are absolutely
  great.
• Register for free and you can download larger
  image sizes.
• This site allows one to search for concepts such
  as surprise, suspense, ideas.

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A Comstock Photo Smart
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Professional Stock Photos

• http//www.freestockphotos.com/
• This site has links to numerous other free
  photograph sites.

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Library of Congress

• The Library of Congress American Memory project
  has great historical photos.
• http//memory.loc.gov/ammem/index.html

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Photo from American Memory
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NCSU

• The NCSU Department of Communication Services has
  just put their photo library on the web.
• They have campus photos, extension photos, and
  photos grouped by college
• However many of the images are bmp files which
  may not work on the web.
• http//images.cals.ncsu.edu/gallery2/main.php

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A NCSU Image
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Two Categories of Images

• There are two basic types of images
• Raster (composed of little dots - pixels)
• As you enlarge a raster image, it tends to get
  fuzzy, grainy, pixelated.
• So if you need an image of a particular subject
  try to fine one near the actual size you need in
  order not to have to enlarge it
• Images that are bitmaps have file extensions of
  .jpg, .bmp, .gif, .png, .tiff

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Two Categories of Images

• Vector
• Vector graphics use mathematical relationships
  between points and the paths connecting them to
  describe an image. Vector graphics are composed
  of paths.
• They can be enlarged with no loss of clarity.
• Vector images end in .wmf, .eps, .svg
• Vector graphics are commonly found on clip art
  CDs.

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Comparison of Vector and Raster
Top image shows vector at 7x magnification,
bottom is raster at 7x magnification
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Sound
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Sound Trivia

• What was the name of the first talkie (A movie
  with sound)
• The Jazz Singer
• In what year was this movie released?
• 1927
• Who did it star?
• Al Jolson
• What were the implications?
• End of an era

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Why use Sound?

• Gains and retains attention
• Sets the mood (helps manage student behavior)
• Contributes to learning
• Can add humor which is related to enthusiasm
  which is related to effective teaching.
• Can be used for stand alone PowerPoint
  presentations
• Fairs
• Recruitment booths
• Open houses

Move the mouse over me
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Sound

• Typically you put sound in a PowerPoint
  presentation.
• However sound can be on a web site (I dont
  recommend that)
• Sound can be inserted into a word document.
• dallas.docx
• dallas.doc

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Is Chuck Amato still coaching at NCSU?
Move your mouse over the images.
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Types of Sound Files

• .WAV
• Very Common audio file format
• Developed by Microsoft and IBM
• Large file size
• PowerPoint loves .wav files
• There are lots of places to download wav files
  on the Internet
• Typically sound clips from movies and tv shows,
  but can be songs

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Types of Sound Files

• .MID (pronounced middy)
• Musical Instrument Digital Interface
• Developed by the music industry
• Small file size
• Often found in greeting cards that play music
• Often plays a rudimentary sound
• You can insert a .mid file into PowerPoint using
  the insert, movies and sound menu but cant
  insert it using custom animation or action
  settings.

Click on me
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Types of Sound Files

• .MP3
• A type of MPEG file (Moving Picture Experts
  Group)
• Supported in PowerPoint 2000 on (not 97)
• These files are typically songs
• You can insert a mp3 file into PowerPoint using
  the insert, movie and sounds menu but cant
  insert it using custom animation or action
  settings.

Click on me
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Types of Sound Files

• .ASF
• Advanced Streaming Format
• A new standard developed by Microsoft for
  streaming audio
• It is unlikely that will use this type of sound
  file in PowerPoint

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Types of Sound Files

• .AU
• An older audio file format
• .RA
• Streaming file format developed by Real Audio
• You will probably not use either in PowerPoint,
  but should be aware of the existence of these
  files.

Click on me
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Sound Sources

• http//www.externalharddrive.com/waves/waves.html
• http//www.thefreesite.com/Free_Sounds/Free_WAVs/
• http//www.wavcentral.com/

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Using Sound in PowerPoint

• Insert a Sound file onto a slide.
• Insert
• Movies and Sound
• Sound from File
• You will be asked if you want it to play
  automatically or play when you click on the sound
  icon.

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Using Sound in PowerPoint

• Use Action Settings associated with an image

Mouse Click
Mouse Over
Mouse Over
Mouse Click
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Using Sound in PowerPoint

• Use sound effects as part of custom animations

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Using Sound in PowerPoint

• Playing a CD track (however the CD has to be in
  the CD player-you can see the icon below but will
  hear no sound because the CD is not in the
  computer)
• You select which tracks to play in the Insert,
  Movies and Sounds, Play CD Audio Track

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Using Sound in PowerPoint

• Recording a narration
• Go to slide show and select record narration
• This could be used by
• a substitute teacher
• A self presentation at the county fair, open
  house, pta meeting, etc.

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Using Sound in PowerPoint

• Playing a background Soundtrack

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Advanced Sound Techniques

• Audacity and WavePad is used to edit sound files

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An Important Note

• If a sound file is small (less than 100 Mb) it
  will be embedded within the slide presentation.
• If the sound file is large (more than 100 Mb),
  Powerpoint will LINK to the file.
• THEREFORE THE SOUND FILES NEED TO BE SAVED IN THE
  SAME FOLDER AS THE POWERPOINT PRESENTATION OR THE
  LINKING WILL NOT WORK!

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Conclusion

• Sound files should be used in PowerPoint but
  dont get carried away.
• It is better to have a few sounds than too many.

Some of the sound files in this presentation will
not play on your computer because they are larger
that 100 Mb