Digital File Formats

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Digital File Formats

• ACCT-IGD-10 Students will generate and
  manipulate various graphic imaging processes.
• ACCT-IGD-15 Students will identify and produce
  files utilizing different digital formats.
• ACCT-IGD-16 Students will identify and
  demonstrate page layout terminology and tools.
• ACCT-IGD-17 Students will identify and
  understand the differences in page layout, raster
  based photo manipulation, and vector based
  graphic software applications.

By Michael Simmons
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Computer Platforms

• Platform the standard around which a system can
  be developed.
• Computer platforms include the elements
  (programs/software, printers/hardware) necessary
  to create, assemble, and output data in the
  finished form.
• Mac, IBM, Unix

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Common Software

• Adobe Indesign - edit/create page layouts
• Adobe Photoshop edit graphics (both raster and
  vector)
• Adobe Illustrator edit/create vector graphics
• Corel Draw edit/create graphical designs
  (t-shirts)
• Each program saves the file in different formats
  for different usages.

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Digital Image File Formats

• The file format selected will determine the type
  of modifications that can be made to the file and
  the type of compression used to storage the file
  and the quality of the file after decompression.

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Image Terminology

• Lossless Compression no data is lost during
  file compression or decompression (zip file)
• Lossy Compression data is lost during
  compression or decompression (video or .jpg)
• Raster Images images made up of pixels (also
  referred to as bitmap or pixmap)
• Vector Images image made up of lines
• Open Press Interface a computer and software
  configuration that allows the designer to use
  low-resolution images when creating the document
  layouts in page composition programs and
  high-resolution images automatically replace the
  low-resolution images when the file is sent to an
  output device (Indesign)

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Raster v/s Vector
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TIFF or TIF(.tiff or .tif)

• TIFF - Tagged Image File Format
• Used to exchange bitmapped images between
  applications
• Lossless or Lossy compressions
• Supports Grayscale, RGB, CMYK
• Easily exchanged between computer platforms

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EPS(.eps)

• EPS - Encapsulated PostScript
• One of the most stable files used in delivering
  digital output
• Less convent than .tif
• Handle both raster and vector
• Supports Grayscale, RGB, CMYK, Spot Color
• Provided open press interface
• EPS files can be opened in a text editing
  software (Notepad)

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Desktop Color Separation

• EPS graphics that are saved as a single file that
  can include five plates (CMYK) or six plates
  (CMYK and two spot color) and a master image
• Supports Grayscale, RGB, CMYK, Spot Color
• Prints faster than standard EPS
• Contain both raster and vector

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GIF(.gif)

• GIF Graphics Interchange Format
• Supports raster images and only handles 256
  colors
• Effective format for drawn images, animations,
  internet images

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PDF(.pdf)

• PDF Portable document format (created by Adobe)
• Universal file format for electronic documents
  (even images)
• Keeps all the aspects of the original file,
  regardless of what application or platform
  created it.
• They are page independent which means a single
  page can be printed, replaced, or altered without
  reprocessing the other pages
• Self contained document all the images, fonts,
  and other resources that are needed to reproduce
  the image contained in the file.

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Naming files

• The name of the file should be simple and is
  placed before the extension
• Example - name.extension (simmons1.Pdf)
• General rules for naming files
• Use only alphanumeric characters.
• Symbols should be avoided.
• File names should not begin with a space

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References

• http//www.signindustry.com/computers/articles/200
  4-11-30-DASvector_v_raster.php3
• http//en.wikipedia.org