Scanners, Scanning and Scanography  For RIGHT brained thinkers Presented to the Sequim  PC User's Group Tom Pitre,  Decemb...
A Little Scanner Entertainment Scanner  plays music.  Follow the link above at home. http://www.youtube.com/v/jJgSraig-bU&...
Cat Scan
How Does a Scanner Work? Image is lit. Mirrors reflect light into lens, then on to a CCD that turns light into electricity...
Carriage Assembly of Scanner
The CCD
Tiny, Optical Lens
A Poor Job of Scanning
Moire or interference pattern Source and background informaton:  http://en.wikipedia.org/wiki/Moir%C3%A9_pattern
Another Newspaper Scan
A Good Scan – in color
Google Book Scan Problem
Scanners used to: <ul><li>Scan  paper  – including documents, pictures, etc. in black and white, gray tones and color </li...
Scanner Control Panel; Example
Scanned Text (image)
OCR – on line service Image to DOC or TXT http://www.newocr.com
Scanner Button Settings
Image Scan Settings
More about Settings <ul><li>300 dpi is nominal. To print, use 600 dpi.  Use 600 for CD/DVDs, museum archives. </li></ul><u...
Grayscale The scale is 0 to 100.  0 is paper white, while 100 is solid black.
Dithering Dots or pixels are arranged in such a way that allows us to perceive more colors than are actually used.
More about Scanning Newspapers <ul><li>Back up the clipping with BLACK paper to prevent “print through”. </li></ul><ul><li...
Descreening
Resolution – general “rule of thumb” <ul><li>For example, let's say you were scanning a 6&quot; x 4&quot; photo and printi...
Scanning Slides <ul><li>Template for back lighting  (For slides.). Reflects light BACK through the slide. </li></ul><ul><l...
Original scanned at 300 dpi
Original scanned at 96 dpi
Deep Field Scanning You may scan under plastic (translucent plastic box) or under a black box. (Paint inside of a shallow ...
Scanning Objects Scan  Feathers Fruit and vegetables Shells Flowers Pine Cones
Scan Backgrounds and Large Images <ul><li>Use of tissue paper, rice paper, velvet or any texture or background that would ...
Scanning objects
Manipulation of Source
Art Scan; Assemblage
Tips and Tricks <ul><li>Experiment.  Make collages and scan them, Make assemblages and scan them (3D) </li></ul><ul><li>Ma...
3D Object
Jump to Designing a Porch <ul><li>I used my scanner in 2002 to design a front porch for my house.  </li></ul><ul><li>A por...
Scanned B&W Negative Scanned negative on LEFT.  Used image software to change scan to NEGATIVE, which makes a “PRINT”.  Th...
Scan Negatives
References <ul><li>http://www.scantips.com/ </li></ul><ul><li>http://heritagecollector.com/support/Registered/GSuggestions...
What's Next? <ul><li>As always, practice, experiment </li></ul><ul><li>Practice some more. Then some more. </li></ul>
Credits <ul><li>Thanks to Richard at Nicola Engineering for color information. </li></ul><ul><li>Thanks to Thomas at Tutor...
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Scanocity

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A small powerpoint presentation that is mentioned in Scanocity is not available for upload. It demonstrates use of scanned image to design a structure. Not critical for understanding. tp, author.

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Scanocity

  1. 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. 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. 3. Cat Scan
  4. 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. 5. Carriage Assembly of Scanner
  6. 6. The CCD
  7. 7. Tiny, Optical Lens
  8. 8. A Poor Job of Scanning
  9. 9. Moire or interference pattern Source and background informaton: http://en.wikipedia.org/wiki/Moir%C3%A9_pattern
  10. 10. Another Newspaper Scan
  11. 11. A Good Scan – in color
  12. 12. Google Book Scan Problem
  13. 13. Scanners used to: <ul><li>Scan paper – including documents, pictures, etc. in black and white, gray tones and color </li></ul><ul><li>Scan objects – for ART and non-art use </li></ul><ul><li>Used to send a “FAX”, via email </li></ul><ul><li>To archive important documents (feeder) </li></ul><ul><li>Convert image to editable text using OCR software </li></ul><ul><li>As a design tool for graphics, drafting, etc. </li></ul>
  14. 14. Scanner Control Panel; Example
  15. 15. Scanned Text (image)
  16. 16. OCR – on line service Image to DOC or TXT http://www.newocr.com
  17. 17. Scanner Button Settings
  18. 18. Image Scan Settings
  19. 19. More about Settings <ul><li>300 dpi is nominal. To print, use 600 dpi. Use 600 for CD/DVDs, museum archives. </li></ul><ul><li>Computer screens are 96dpi, so use 96 dpi if it's for the for the PC. </li></ul><ul><li>Save in TIF for quality. JPGs for photos and art, GIFs for line art, text and font images. </li></ul><ul><li>Use B&W for plain text, Grayscale for newspapers*, photos, pencil and text for print </li></ul><ul><li>Dithering – smooths color – example follows. </li></ul>
  20. 20. Grayscale The scale is 0 to 100. 0 is paper white, while 100 is solid black.
  21. 21. Dithering Dots or pixels are arranged in such a way that allows us to perceive more colors than are actually used.
  22. 22. More about Scanning Newspapers <ul><li>Back up the clipping with BLACK paper to prevent “print through”. </li></ul><ul><li>Iron the clipping so it's FLAT. Put dish towel on it and iron it. </li></ul><ul><li>Some scanners have DESCREEN. Use it. </li></ul><ul><li>Some scan in color and convert to grayscale </li></ul><ul><li>Scan in as TIF, manipulate image then save as .jpg </li></ul>
  23. 23. Descreening
  24. 24. Resolution – general “rule of thumb” <ul><li>For example, let's say you were scanning a 6&quot; x 4&quot; photo and printing to a 600 dpi color printer. </li></ul><ul><li>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). </li></ul>
  25. 25. Scanning Slides <ul><li>Template for back lighting (For slides.). Reflects light BACK through the slide. </li></ul><ul><li>Battery operated light – fluorescent (color, no EMF interference since ( NOT 60 cps) battery is used) </li></ul>
  26. 26. Original scanned at 300 dpi
  27. 27. Original scanned at 96 dpi
  28. 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. 29. Scanning Objects Scan Feathers Fruit and vegetables Shells Flowers Pine Cones
  30. 30. Scan Backgrounds and Large Images <ul><li>Use of tissue paper, rice paper, velvet or any texture or background that would add interest. </li></ul><ul><li>Keep scan glass clean and protected </li></ul><ul><li>Scan large images and STICH together with software. Search GOOGLE for “panoramic” for samples, guides, etc. </li></ul>
  31. 31. Scanning objects
  32. 32. Manipulation of Source
  33. 33. Art Scan; Assemblage
  34. 34. Tips and Tricks <ul><li>Experiment. Make collages and scan them, Make assemblages and scan them (3D) </li></ul><ul><li>Make your own FONTS for writing http://www.yourfonts.com </li></ul><ul><li>Scan your signature http://www.productivity501.com/how-to-create-a-scanned-signature/357/ </li></ul>
  35. 35. 3D Object
  36. 36. Jump to Designing a Porch <ul><li>I used my scanner in 2002 to design a front porch for my house. </li></ul><ul><li>A portion of the slide presentation is shown here with explanation. </li></ul>
  37. 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. 38. Scan Negatives
  39. 39. References <ul><li>http://www.scantips.com/ </li></ul><ul><li>http://heritagecollector.com/support/Registered/GSuggestions/Class2Scanning.htm </li></ul><ul><li>http://danandsherree.com/2005/10/07/basic_scanning_techniques.php </li></ul><ul><li>http://www.web-wise-wizard.com/web-graphics-design/ (Image formats) </li></ul><ul><li>http://www.newocr.com/ Image to TEXT </li></ul>
  40. 40. What's Next? <ul><li>As always, practice, experiment </li></ul><ul><li>Practice some more. Then some more. </li></ul>
  41. 41. Credits <ul><li>Thanks to Richard at Nicola Engineering for color information. </li></ul><ul><li>Thanks to Thomas at TutorVista for math conversions. </li></ul><ul><li>Thanks to Jessica for recycled scanner parts. </li></ul><ul><li>Thanks to WikiPedia for diagram. </li></ul>Presentation, © 2009, T. Pitre, Sequim.

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