Transcript PPT - Faculty Web Sites

The Role of Scanners & Digital Files
in Instruction
By: Beverly Fenimore
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Scanner Technology
Types of scanners
Scanner software
What is a digitized image
Possible Educational uses
Examples
References
Scanner Technology
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A scanner captures and digitizes visual images.
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The most common type of scanner is a flatbed scanner.
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A scan head consisting of large number of photosensitive 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”.
Types of Scanners
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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.
Scanner Software
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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).
Digitized Image
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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.
Educational setting
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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.
Educational setting con’t
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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.
Goals con’t
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These goals provide educational
institutions with a technology that
facilitates learning, encourages
meaningful interaction, invites
creativity, and provides the students
with real world experiences
Conclusion
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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.
Example: use in instruction
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Students can add
text and pictures
in each slide for
class project.
Examples con’t
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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.
References
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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.html#sc10
Productivity without Boundaries
http://www.scansoft.com/omnipage/
National School Board Association
http://www.nsba.org/site/page_micro.asp?TRACKID=&CID
=63&DID=195
Scanners Lesson Plans examples:
http://www.lessonplanspage.com/CIScienceBarkScanDigital
CameraIdea58.htm
http://www.lessonplans.com.au/scanpics.htm
The End