1. Digital Image Editing ASSH Computer Training 03
Friday, 4 October :30-6:30 pm
Amy L. Ladd MD
Michael Hausman MD

2. Goals for this Course
Convince yourself your digital camera and your new computer were worth it --and enjoy using them
Review basics of cameras, scanners, and printers (Appendix A)
Understand compression and file formats (Appendix B)
Handle digital images
Use basic, advanced Photoshop tools
Understand concepts of image storage
Prepare images for and the web

3. Photoshop 6.0 for course
Photoshop 7.0, 5.5, 5.0, 4.0 okay
Photoshop Elements, too
Demo (download): can’t save images
Others--YOYO

4. Cameras etc. Memory cards PC card readers Printers Scanners
Compact Flash
SmartMedia
Sony Stick
PC card readers
Printers
Scanners
“Keep in mind that in spite of its advanced technology, the computer is still just a computer. It’s not omnipotent. It’s not human. It’s just a machine. It has its limitations. Accept computers for the amazing tools they are, but don’t give them power over you.”
--Simplify Your Work Life Daily Calendar, 20 August 2002

5. Image Formats JPEG (Joint Photographic Experts Group) image.jpg
“Lossy” but efficient and useful
Standard--need good excuse not to use
GIF (Graphics Interchange Format)
“Lossless” good for transparencies and web
Corrupts easily
PSD (Photoshop Document)
For Layers and special effects
TIFF (Tagged Image File Format)
Uncompressed, print quality
Rarely use
image.jpg
image.gif
image.psd
image.tif

6. JPEG features Compresses and expands well Great for all imaging needs
Closing image
Sampling (“quality”)
Great for all imaging needs
Open vs. Compressed
2-10x difference

7. Digital Jargon Pixel = Picture Element ppi = Pixel per Inch
a “box” of information
Red, Green, Blue
Shape, orientation
ppi = Pixel per Inch
72 ppi most monitors (96ppi)
dpi = Dot per Inch
Dot = “blob” or box
No encoded information
Printers (Monitors)
Image = Mosaic of pixels

8. Resolution Resolution Recommended File Size dpi vs ppi
dpi (dots per inch) = monitors and printers FIXED
ppi (pixels per inch) = digital images VARIABLE
Recommended File Size
Images: Print (300 ppi)
PowerPoint (150 ppi)
(72 ppi)

9. Pixels vs. Vectors Pixels: Bitmap (boxes)
Vectors: Mathematical lines and curves

10. Pixel Pundits (How to waste space)
Pixel # defined with raw image
Can’t create more pixel information
But can increase file size unwittingly

11. Overview: Download and Save
Download images
Via card reader, cable, etc
Open Photoshop
Edit
Save
Store

12. Specific Tasks Rotate Reverse Undo Grayscale Label Advanced: layers
Edit effects
Save for web
Save for print or PowerPoint
Store

13. Image 1: X-ray
Grayscale
Rotate
Reverse
Undo
Save and name

14. Image 2: X-ray askew Grayscale Rotate arbitrary Crop Name and save
Create smaller derivative
Save for web

15. Image 3: Color Print Image
Change image size
Change Resolution
Fiddle with Resolution
Save and name

16. Image 4: Annotated Image
Rotate image
Check Image size and Resolution
Label features (Layers)
Text
Arrow
Undo and edit
Save psd (Photoshop Document)
Flatten and save jpg

17. PowerPoint Frustrations

18. Save for PowerPoint Larger than Web Smaller than Print
Compress to ≤ 1 MB open (≤ 300 K closed)
Resolution/Size
72 ppi = 6 x 8” (432 x 576 pixels) 729 K
150 ppi = 3 x 4” (450 x 600) 792 K

19. Add Picture in PowerPoint
Slide Layout Feature for Add Picture
Doesn’t give you sense of the image size
Doesn’t let you animate (appear, disappear) in same sequence with other images

20. Filing and Storage Derivative System
Native image unedited for print (wrist1.tif)
Native image compressed (wrist1.jpg)
Edited image for web (wrist1a.jpg)
Annotated image for print with layers (wrist1b.psd)
Annotated image for print with layers flattened (wrist1b.jpg)

21. Storage Nesting Folders Images Images Work Images Work 2002
Images Work April 2002
Madelung’s
[Images]

22. Web Display
Automated Task
Web Photo Gallery
Upload Folder to Server

23. Additional Images Advanced Editing
Improve imperfections
Clone stamp
Contrast/Auto Contrast
Balance/Auto Balance
Dodge/Burn

24. Image 6: Advanced Editing
Framing
Matte
Vignette
Two-tone Subject
Eliminate junk
Grayscale
Color Balance

25. Conclusions Save, Save, Save Be Parsimonious Compose a Good Picture
Ockham’s Razor (Law of Parsimony)
“Entities are not to be multiplied beyond necessity"
---William of Ockham ( )
Conclusions
Save, Save, Save
Make Derivatives but Save original or early copy
Use Undo and History palette
Save in the format you need
Print
Web
PowerPoint
Be Parsimonious
Crop, Crop, Crop
Eliminate Duplicates
Use simple names
Compose a Good Picture

26. Questions

27. Thank you