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1. PowerPoint Presentations:Graphics Basics – Part 1 Ross Health Sciences

2. Initial Problems Most people just place images into PowerPoint® without paying any attention to the image’s type and attributes Scanners/cameras may not be set correctly and/or images may not be correctly reformatted prior to use for on-screen viewing Screen resolution limits not understood 2

3. Initial Problems May have limited image manipulation knowledge /skills (use of imaging software) May not be aware of/use retouching features built into the PowerPoint® program 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 3

4. Rules of Thumb Use proper image type- to maximize both viewing quality and size compression Don’t be leery of image programs- simple steps and processes can yield quick and optimal results- shallow learning curve for most needs Know the limits of screen resolution 4

5. Best Practices Acquire images in high-end format to archive for possible uses other than screen (printing)- TIFF Copy original to 2nd archive folder for on-screen version and translate for screen-limit resolution- JPEG 5

6. Best Practices Keep original TIFF and JPEG secure and pristine- work with copies only Put working copies of JPEG into folders adjacent to associated presentations Avoid serial resave of JPEGs- get new copy 6

7. Best Practices GIF Text is in Front Text is Behind PNG JPEG 7 Use for simple graphics like ClipArt Use for the vast majority of photographic media types Use only when transparency is essential

8. Common Sources Textbook Scans Microscope Scans Digital Diagnostic Images Digital Image Databases Digital Camera Photographs Web Graphics Clip Art Personal Art Scans Computer Graphic Illustrations 8

9. Image Dissection Right-click over an image in a folder and choose properties and define what is there with the General and Summary Tabs 9

10. Image Dissection 10

11. Image Dissection 11 1436px/300ppi= 4.79 inches 1464px/300ppi= 4.88 inches Double-click image to bring up Format tab and you will see the actual size (4.88x4.79)

12. Bit Depth 21= 1 Bit (Black or White pixels ONLY- monochrome) 28= 8 Bits [256] per color channel (R,G,B)= 24-Bit or 2563= 16.7 million colors; true-color image 28= 8 Bit (256 shades from BW; grayscale) 12

13. 9MB TIFF 13

14. 420KB JPEG or 9MB TIFF Which is Which? 14 Click Here for Answer TIFF Image A Image B

15. 420KB JPEG Enlarged 133% Apparent resolution 2/3s * 150= 100PPI 15

16. 600KB JPEG or 2.8MB TIFF- Which is Which? 16 TIFF Image A Image B Click Here for Answer

17. 56KB JPEG or 2.8MB TIFF Which is Which? 17 Click Here for Answer TIFF Image A Image B

18. 290KB JPEG or 36.7MB TIFF (cropped) Which is Which? 18 Click Here for Answer TIFF Image A Image B

19. 397KB JPEG (cropped) 19 Actual Size 0.62x0.58inches

20. 20 12x enlarged = 7.08x7.56inches Appearance 100PPI

21. Morale of the Story 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 21