File Size

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File Size

  1. 1. File Size What does file size have to do with me?
  2. 2. Does size matter?
  3. 3. File size impacts every web page on the internet
  4. 4. What are file properties? <ul><li>Size </li></ul><ul><li>Location </li></ul><ul><li>Type </li></ul><ul><li>Date the file or folder was created. </li></ul><ul><li>Last modified date </li></ul>
  5. 5. How do you inspect properties? <ul><li>Right mouse click </li></ul><ul><li>View details </li></ul>
  6. 6. Experiment <ul><li>In no longer than 3 minutes </li></ul><ul><li>Using MS Paint </li></ul><ul><li>Create a graphic in paint that details some process (any process). </li></ul>
  7. 7. Output file #1 <ul><li>When complete </li></ul><ul><li>Save your picture to the desktop in the default file format for PAINT. </li></ul><ul><li>.BMP is the default file format. </li></ul><ul><li>Minimize PAINT program </li></ul>
  8. 8. Inspect the File Properties <ul><li>Determine the size of your file. </li></ul><ul><li>Remember </li></ul><ul><li>Right mouse click </li></ul><ul><li>Properties </li></ul>
  9. 9. Output file #2 Go Back to Paint <ul><li>Save your image again to the desktop </li></ul><ul><li>But </li></ul><ul><li>Choose .JPG file format File / Save As </li></ul>
  10. 10. Inspect the File Properties <ul><li>Determine the size of your file. </li></ul><ul><li>Remember </li></ul><ul><li>Right mouse click </li></ul><ul><li>Properties </li></ul>
  11. 11. Compare your two files <ul><li>BMP </li></ul><ul><li>Can you tell them apart? </li></ul><ul><li>Are they same size? </li></ul><ul><li>Which one would you want on your web page? </li></ul><ul><li>Is bigger better? </li></ul><ul><li>JPG </li></ul>
  12. 12. File Size <ul><li>Why is file size important? </li></ul><ul><li>What file formats does the Internet use? </li></ul><ul><li>Why? </li></ul><ul><li>What is file compression? </li></ul><ul><li>Why is file compression needed? </li></ul>
  13. 13. Compression Strategies <ul><li>It is possible to use save as to change file type and file size </li></ul><ul><li>You can also use other programs to compress files </li></ul><ul><li>WinZip is the default standard </li></ul>
  14. 14. Zip or Compression Strategies Big Giant File Paint.bmp WinZip Compression Smaller compressed file Paint.zip
  15. 15. Unzip … or decompress Big Giant File Paint.bmp WinZip Compression Smaller compressed file Paint.zip
  16. 16. Problem <ul><li>I created an electronic survey </li></ul><ul><li>I mailed it to everyone </li></ul><ul><li>It was too big to mail </li></ul><ul><li>Mail limit is 500KB </li></ul><ul><li>What should I do? </li></ul>
  17. 17. PDF is too big - Zip it Big Giant File Survey.pdf 88k 88,000 WinZip Compression Survey.zip 29.8k 29,800
  18. 18. (Remember that on a 28.8Kps modem, it will take on average of 40 seconds to download 100Kb of data.)
  19. 19. File size impact performance File compression is necessary to move large files WinZip if a free program you can use.
  20. 20. Is bigger better? Explain.

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