The Role of Scanners

1
The Role of Scanners Digital Filesin
InstructionBy Beverly Fenimore

• Scanner Technology
• Types of scanners
• Scanner software
• What is a digitized image
• Possible Educational uses
• Examples
• References

2
Scanner Technology

• A scanner captures and digitizes visual images.
• The most common type of scanner is a flatbed
  scanner.
• A scan head consisting of large number of
  photo-sensitive elements moves in small steps
  across the scanning surface.
• The light reflected or transmitted through the
  image is picked up by the sensors and digitized
  into numeric values.
• Numeric values are captured by the scanner
  software and stored in a file digital image.

3
Types of Scanners

• Flatbed Scanners- resemble copy machines
• Sheetfed Scanners-These units are like a fax
  machine, than a copier.
• Slide Scanners-Unit has very high resolution and
  good for scanning slides.
• Drum Scanners-found in color prepress companies.
  Expensive in comparison to flatbed scanners.

4
Scanner Software

• Scanning process is controlled by scanner
  software.
• Software controls the workflow in terms of
  productivity and quality of the scan
• Software controls Color, sharpening, automated
  dust/scratch removal, negative to positive image
  selection and scan quality control (lower speed
  for higher quality, vice versa).

5
Digitized Image

• Numeric encoding generated by a scanner is known
  as a digital image.
• Scanner captures and saves an image as TIFF
  (Tagged Information format file).
• Web browsers can display GIF, JPEG and PNG
  format files. These are compressed formats.

6
Educational setting

• Scanners used to transfer images, such as family
  photos, into a document of text.
• Scanned images can be modified or edited to
  resize or to create special effect like blurring.
• Scanned images can be save on a disk and use in
  power-point, and on websites.

7
Educational setting cont

• Scanners help fulfill nine of the goals of
  technology identified by the National School
  Board Association.
• These goals are considered the toughest goals to
  evaluate concerning technology and student
  achievement.

8
Goals cont

• These goals provide educational institutions with
  a technology that facilitates learning,
  encourages meaningful interaction, invites
  creativity, and provides the students with real
  world experiences

9
Conclusion

• Scanners help provide educational institutions
  with a technology that facilitates learning,
  encourages meaningful interaction, invites
  creativity, and allows students to interact more
  meaningfully with assignments.

10
Example use in instruction

• Students can add
• text and pictures
• in each slide for
• class project.

11
Examples cont

• Scan photographs relevant to topic
• Scan drawings for use in presentations and Web
  sites.
• Scan children hands to measure growth.
• Scan images into power-point slides.
• Scan images and text and save in HTML for use in
  web sites.

12
References

• Heinich, R,. Micael, M,. James, R,. Smaklino,S.
  (2002). Instructional Media and Technologies for
  Learning
• Scanners creating digital files
• http//www.tasi.ac.uk/advice/creating/scanners.htm
  lsc10
• Productivity without Boundaries
  http//www.scansoft.com/omnipage/
• National School Board Association
• http//www.nsba.org/site/page_micro.asp?TRACKIDC
  ID63DID195
• Scanners Lesson Plans examples
• http//www.lessonplanspage.com/CIScienceBarkScanDi
  gitalCameraIdea58.htm
• http//www.lessonplans.com.au/scanpics.htm
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