Power point graphics_1


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Power point graphics_1

  1. 1. PowerPoint Presentations:Graphics Basics – Part 1<br />Ross Health Sciences<br />
  2. 2. Initial Problems<br />Most people just place images into PowerPoint® without paying any attention to the image’s type and attributes<br />Scanners/cameras may not be set correctly and/or images may not be correctly reformatted prior to use for on-screen viewing<br />Screen resolution limits not understood<br />2<br />
  3. 3. Initial Problems<br />May have limited image manipulation knowledge /skills (use of imaging software)<br />May not be aware of/use retouching features built into the PowerPoint® program<br />May not be willing to take the time to reformat incorrect images in use or willing/able to re-acquire correctly formatted images snowball effect<br />3<br />
  4. 4. Rules of Thumb<br />Use proper image type- to maximize both viewing quality and size compression<br />Don’t be leery of image programs- simple steps and processes can yield quick and optimal results- shallow learning curve for most needs<br />Know the limits of screen resolution<br />4<br />
  5. 5. Best Practices<br />Acquire images in high-end format to archive for possible uses other than screen (printing)- TIFF<br />Copy original to 2nd archive folder for on-screen version and translate for screen-limit resolution- JPEG<br />5<br />
  6. 6. Best Practices<br />Keep original TIFF and JPEG secure and pristine- work with copies only<br />Put working copies of JPEG into folders adjacent to associated presentations<br />Avoid serial resave of JPEGs- get new copy<br />6<br />
  7. 7. Best Practices<br />GIF<br />Text is in Front<br />Text is Behind<br />PNG<br />JPEG<br />7<br />Use for simple graphics like ClipArt<br />Use for the vast majority of photographic media types<br />Use only when transparency is essential<br />
  8. 8. Common Sources<br />Textbook Scans<br />Microscope Scans<br />Digital Diagnostic Images<br />Digital Image Databases<br />Digital Camera Photographs<br />Web Graphics<br />Clip Art<br />Personal Art Scans<br />Computer Graphic Illustrations<br />8<br />
  9. 9. Image Dissection<br />Right-click over an image in a folder and choose properties and define what is there with the General and Summary Tabs<br />9<br />
  10. 10. Image Dissection<br />10<br />
  11. 11. Image Dissection<br />11<br />1436px/300ppi= 4.79 inches <br />1464px/300ppi= 4.88 inches <br />Double-click image to bring up Format tab and you will see the actual size (4.88x4.79)<br />
  12. 12. Bit Depth<br />21= 1 Bit (Black or White pixels ONLY- monochrome)<br />28= 8 Bits [256] per color channel (R,G,B)= 24-Bit or 2563= 16.7 million colors; true-color image<br />28= 8 Bit (256 shades from BW; grayscale)<br />12<br />
  13. 13. 9MB TIFF<br />13<br />
  14. 14. 420KB JPEG or 9MB TIFF<br />Which is Which?<br />14<br />Click Here for Answer<br />TIFF<br />Image A<br />Image B<br />
  15. 15. 420KB JPEG<br />Enlarged 133%<br />Apparent resolution<br />2/3s * 150= 100PPI<br />15<br />
  16. 16. 600KB JPEG or 2.8MB TIFF- <br />Which is Which?<br />16<br />TIFF<br />Image A<br />Image B<br />Click Here for Answer<br />
  17. 17. 56KB JPEG or 2.8MB TIFF<br />Which is Which?<br />17<br />Click Here for Answer<br />TIFF<br />Image A<br />Image B<br />
  18. 18. 290KB JPEG or 36.7MB TIFF (cropped)<br />Which is Which?<br />18<br />Click Here for Answer<br />TIFF<br />Image A<br />Image B<br />
  19. 19. 397KB JPEG (cropped)<br />19<br />Actual Size 0.62x0.58inches<br />
  20. 20. 20<br />12x enlarged =<br />7.08x7.56inches<br />Appearance 100PPI<br />
  21. 21. Morale of the Story<br />Screen resolution is screen resolution images with higher resolution will not display any better, but will take up much more file space, cause huge presentations, slow everything down and increase failures<br />21<br />
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