1. Image processing Skills: none
IT concepts: image processing program, operation, data type, image file type, data compression
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2. Image processing in context

3. Image processing in IT literacy context
Internet concepts
Applications
Technology
Implications for
Individuals
Organizations
Society
Internet skills
Application development
Content creation
Text
Images
Audio
Video

4. When data types went mainstream
Decade
Data Type
1950s
Numeric
1960s
Alphanumeric
1970s
Text
1980s
Images, speech
1990s
Music, low-quality video
2000s
High-quality video

5. Image processing in 1964
Ivan Sutherland operating Sketchpad, an early example of interactive, personal computing with a graphical user interface, but it ran on a multimillion dollar computer.

6. Alan Kay shows a video of Sketchpad

7. Image processing examples

8. Subtle retouching of a photo
Photographer and retoucher Michael Kubeisy believes the trick with Photoshop is knowing when to stop. Here are changes made on this image: 1 Her crow's feet were made softer with the healing brush, which seamlessly corrects imperfections by matching texture and lighting; 2 The whites of her eyes were brightened using the dodge tool; 3 Some flyaway strands hairs on the top of her head were removed; 4 Johnson's teeth were slightly whitened, again using the dodge tool; 5 Her skin was smoothed out and given a soft glow; 6 A blemish was removed from her collarbone; 7 Some lines around her neck were softened, and the carotid artery in her neck was erased. (Michael Kubeisy with Digital-Ops.)
Crow's feet made softer
Whites of her eyes brightened
Flyaway strands hairs on the top of her head removed
Teeth slightly whitened
Skin smoothed out and given a soft glow
Blemish removed from her collarbone
Lines around her neck softened and the carotid artery in her neck erased

9. Not so subtle
From worth1000.com

10. Abraham Lincoln’s head on John Calhoun’s body
A Brief History of Photo Fakery
You don’t need a computer, but it makes it a lot easier.

11. Image processing operations and programs

12. Word and image processing operations
Text data
Image data
Select text
Cut text
Copy text
Move text
Delete text
Change fonts
Change text size
Change text color
Change footnote style
Check spelling
Compress a text file
Etc. etc.
Select a portion of the image
Crop an image
Copy a portion of an image
Move a portion of an image
Delete a portion of an image
Resize an image
Rotate an image
Change image brightness
Change image contrast
Change colors
Compress an image file
Etc. etc.
Can you think of other word and image processing operations?

13. Popular programs Word processing Image processing
Adobe photoshop (proprietary, desktop)
Paint.net (open source, desktop)
Photoshop.com (network)
Microsoft Word (proprietary, desktop)
Open Office (open source, desktop)
Google Docs (network)
There are many other image processing programs, and they are often included with cameras.
Can you think of other examples?

14. Which image processor should you use?
Photoshop – used by most professional photographers and designers
Paint.net – many features and is fine for this class and most work
Gimp – open source program with the features of Photoshop
Paint – is free with Windows, but is lame.
Network image processors – not ready for prime time, but keep watching
Any other that you have already and are familiar with
To get these and others, see the resources section at:

15. Image processing file types

16. Flat versus photographic images
Logos and other images with a limited color palette
Photographic images with continuous tone variation
Different file types for different types of image

17. Common Internet image file types
.gif: Graphic Interchange Format, used for logos, cartoons, and other flat art with up to 256 different colors
.png: Portable Network Graphics, gif replacement (more colors), cannot do animation
.bmp: Microsoft Bitmap, an uncompressed format used for photographic images
.jpeg (or .jpg): Joint Photographers Expert Group, a compressible format used for photographic images
Compression – making the file smaller, but reducing image quality – more later.

18. Flat versus photographic images
.png or .gif if animation or compatibility is an issue
.jpg or .bmp if file size is not an issue

19. Processing different file types
Nearly every image processing program can handle the common image file types.
You can use your image processing program to convert from one type to another.
See this article or Wikipedia for more information.