The document discusses various aspects of scanners, including their history, functionality, and different uses such as scanning documents, images, and objects. It provides technical insights into scanning resolutions, formats, and settings, as well as practical tips for effective scanning techniques. Additionally, it includes references and links for further information on scanning practices and recommendations.

1. Scanners, Scanning and Scanography For RIGHT brained thinkers Presented to the Sequim PC User's Group Tom Pitre, December, 2009 First scan, 1957 - from a SCANNER in development at the U.S. National Bureau of Standards. Size – measured 5 sq. CM (@ .77 sq. inches)

2. A Little Scanner Entertainment Scanner plays music. Follow the link above at home. http://www.youtube.com/v/jJgSraig-bU&hl=en&fs=1&

3. Cat Scan

4. How Does a Scanner Work? Image is lit. Mirrors reflect light into lens, then on to a CCD that turns light into electricity. White=more current. Focused light reaches color CCD (diodes). A converter (ADC) stores readings of electricity as shades of gray. Lastly, the digital information is sent to PC where it is translated into a format that graphics programs understand.

5. Carriage Assembly of Scanner

6. The CCD

7. Tiny, Optical Lens

8. A Poor Job of Scanning

9. Moire or interference pattern Source and background informaton: http://en.wikipedia.org/wiki/Moir%C3%A9_pattern

10. Another Newspaper Scan

11. A Good Scan – in color

12. Google Book Scan Problem

13. Scanners used to: Scan paper – including documents, pictures, etc. in black and white, gray tones and color Scan objects – for ART and non-art use Used to send a “FAX”, via email To archive important documents (feeder) Convert image to editable text using OCR software As a design tool for graphics, drafting, etc.

14. Scanner Control Panel; Example

15. Scanned Text (image)

16. OCR – on line service Image to DOC or TXT http://www.newocr.com

17. Scanner Button Settings

18. Image Scan Settings

19. More about Settings 300 dpi is nominal. To print, use 600 dpi. Use 600 for CD/DVDs, museum archives. Computer screens are 96dpi, so use 96 dpi if it's for the for the PC. Save in TIF for quality. JPGs for photos and art, GIFs for line art, text and font images. Use B&W for plain text, Grayscale for newspapers*, photos, pencil and text for print Dithering – smooths color – example follows.

20. Grayscale The scale is 0 to 100. 0 is paper white, while 100 is solid black.

21. Dithering Dots or pixels are arranged in such a way that allows us to perceive more colors than are actually used.

22. More about Scanning Newspapers Back up the clipping with BLACK paper to prevent “print through”. Iron the clipping so it's FLAT. Put dish towel on it and iron it. Some scanners have DESCREEN. Use it. Some scan in color and convert to grayscale Scan in as TIF, manipulate image then save as .jpg

23. Descreening

24. Resolution – general “rule of thumb” For example, let's say you were scanning a 6" x 4" photo and printing to a 600 dpi color printer. If you wanted the printout to be the same size as the original, you could scan at 150dpi (= 1/4 the resolution of the printer).

25. Scanning Slides Template for back lighting (For slides.). Reflects light BACK through the slide. Battery operated light – fluorescent (color, no EMF interference since ( NOT 60 cps) battery is used)

26. Original scanned at 300 dpi

27. Original scanned at 96 dpi

28. Deep Field Scanning You may scan under plastic (translucent plastic box) or under a black box. (Paint inside of a shallow box flat black.

29. Scanning Objects Scan Feathers Fruit and vegetables Shells Flowers Pine Cones

30. Scan Backgrounds and Large Images Use of tissue paper, rice paper, velvet or any texture or background that would add interest. Keep scan glass clean and protected Scan large images and STICH together with software. Search GOOGLE for “panoramic” for samples, guides, etc.

31. Scanning objects

32. Manipulation of Source

33. Art Scan; Assemblage

34. Tips and Tricks Experiment. Make collages and scan them, Make assemblages and scan them (3D) Make your own FONTS for writing http://www.yourfonts.com Scan your signature http://www.productivity501.com/how-to-create-a-scanned-signature/357/

35. 3D Object

36. Jump to Designing a Porch I used my scanner in 2002 to design a front porch for my house. A portion of the slide presentation is shown here with explanation.

37. Scanned B&W Negative Scanned negative on LEFT. Used image software to change scan to NEGATIVE, which makes a “PRINT”. This can be manipulated, of course.

38. Scan Negatives

39. References http://www.scantips.com/ http://heritagecollector.com/support/Registered/GSuggestions/Class2Scanning.htm http://danandsherree.com/2005/10/07/basic_scanning_techniques.php http://www.web-wise-wizard.com/web-graphics-design/ (Image formats) http://www.newocr.com/ Image to TEXT

40. What's Next? As always, practice, experiment Practice some more. Then some more.

41. Credits Thanks to Richard at Nicola Engineering for color information. Thanks to Thomas at TutorVista for math conversions. Thanks to Jessica for recycled scanner parts. Thanks to WikiPedia for diagram. Presentation, © 2009, T. Pitre, Sequim.