How a digital camera works

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Take Your Best Shot Beth
Carpenter, Library Services Manager,Outagamie
Waupaca Library System Renee Miller, Graphic
Arts Specialist,Winnefox Library System This
presentation and related handouts will be
available online at http//www.owlsweb.info/ce/p
ast/ December 2006
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How does a digital camera work?
The Pixel Digital photographs are
made up of hundreds of thousands or millions of
tiny squares called picture elements, or just
pixels.
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How does a digital camera work?
Image Size or Resolution More pixels
add detail and sharpen edges.
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How does a digital camera work?
Image Size or Resolution Example This photo
is 1600 pixels wide x 1200 pixels high or 1.92
million total pixels The size of a
photograph is specified in one of two ways - by
its dimensions in pixels or by the total number
of pixels it contains.
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How does a digital camera work?
Image Size or Resolution Camera
Resolution The total number of pixels that a
camera is capable or recording an image
with. Screen Resolution The screens width and
height in pixels. Print Resolution dpi or dots
per inch. Refers to the number of microscopic
droplets of ink per linear inch of printing
surface.
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How does a digital camera work?
Compression The rate of compression affects
image quality.
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How does a digital camera work?
Compression
Uncompressed and
with compression
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How does a digital camera work?
Compression
Lossless
Lossy compression
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How does a digital camera work?
RECAP The Pixel Digital photographs are made up
of hundreds of thousands or millions of tiny
squares called picture elements, or just pixels
Image Size The size of a photograph is
specified in one of two ways - by its dimensions
in pixels or by the total number of pixels it
contains. Resolution The total number of pixels
that a camera is capable or recording an image
with. Compression Shrinks images In order to
speed up the handling and to keep memory
requirements minimal. .
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Graphic file formats for print

• TIFF
• .tiff .gif
• Uncompressed format
• Retains all recorded image information
• Best for large prints

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Storage media and card readers
CompactFlash SmartMedia MemorySticks xD-
Picture Cards
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Software options for image editing

• Photoshop Elements
• Perform advanced editing
• Fine-tune exposure
• Quickly retouch specific areas
• Control color temperature and tint
• Easily adjust shadows and highlights
• Enjoy enhanced support for working with raw
  files
• And more

http//www.adobe.com/
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Software options for image editing

• Picasa
• Free Download!
• Photo management software helps you find, edit
  and share you pictures
• Create slide shows
• Create collages
• Edit your pictures
• And more

http//www.picasa.com/
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What to do with your edited images

• Print output
• Copy images at full resolution.
• Make all your changes in one or two sittings and
  save the corrected image under a
  new name to retain the original.
• For longer-lasting prints, use archival paper.
• Consider using an online photo-printing service
  or taking it to a photo-lab for larger
  high-quality prints.

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What to do with your edited images

• Snapfish
• Inexpensive
• Professionally developed high-quality prints and
  film developing
• Free online photo sharing
• Unlimited online photo storage
• Free online photo editing tools and software
• Unique, customizable photo products
• Mail order, print_at_home or one-hour retail
  pick-up at over 5000 locations.
• http//www.snapfish.com/

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What to do with your edited images

• Use in presentations - PowerPoint
• Accepts images in various formats
• Adds to the visual content of the presentation