Digital Imaging Vocabulary

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Digital Imaging Vocabulary

• POFI 1100
• Brookhaven College

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Digital Imaging Vocabulary

• Digital - All computerized data is digital,
  meaning that it has been reduced to digits, or
  numbers. A computer transmits these numbers as
  electrical signals.
•  Digital Image - A digital image is stored in the
  computer as a set of digits representing colors,
  figures, tones, layout, etc.
• Digital Photography - In digital photography, the
  camera contains no film, and the image does not
  have a physical output, such as a photograph.
  Instead, the image is stored as a digital file in
  the camera, and can be transferred to the
  computer and manipulated using digital imaging
  software

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Digital Imaging Vocabulary

• Digital Imaging Software - Also called Graphics
  Programs. Used to manipulate digital images by
  adjusting color, brightness, contrast, cropping,
  resizing, adding text, and applying filters. The
  five categories of graphics programs are paint
  programs, photo-manipulation software, drawing
  software, computer-aided design (CAD), and 3-D or
  animation software. Some of the most widely used
  graphics software packages are Adobe Photoshop
  (photo-manipulation), Adobe Illustrator
  (drawing), and PaintShop Pro (paint).
• Filter - A special effect applied to a digital
  image. Many filters mimic the effects of special
  camera lenses.

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Digital Imaging Vocabulary

• Digital Camera - A special camera that takes
  digital photographs. Rather than film, a digital
  camera contains flash memory to store the photos,
  or it may contain some other type of digital
  storage, such as a SmartMedia card, which can be
  inserted into a computer using a floppy disk
  converter. Most digital cameras use a cable
  attached to the computer to download images.
• Nimh Batteries - Rechargeable batteries often
  used in digital cameras (nickel metal hydride
  batteries). Digital cameras, especially those
  with LCD screens, use up regular batteries
  quickly, and owners purchase Nimh batteries or an
  AC adapter instead.

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Digital Imaging Vocabulary

• LCD Screen - A small screen on the back or side
  of a digital camera that allows the user to
  review photos or take them without looking
  through the viewfinder.
• Flash Memory - A memory chip used in digital
  cameras that stores the images until the user can
  transfer them to a computer, even when the camera
  is turned off.
• Scanner - A scanning device that uses light
  reflection to convert any image into digital
  electronic form. Color scanners use filters to
  separate colors into values of red, green, and
  blue.

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Digital Imaging Vocabulary

• Flatbed Scanner - A scanner that has a flat glass
  surface on which photos, pages, or items are
  placed for scanning. Flatbed scanners offer the
  most versatility because any item can be scanned,
  including leaves, coins, and jewelry.
• Sheet-Fed Scanner - A scanner that sits upright,
  and sheets of paper are fed through an opening in
  the scanners top or side, similar to a fax
  machine. Sheet-fed scanners are most often used
  in offices where the majority of scanned items
  are text documents.
• OCR - Optical Character Recognition. Software to
  translate a scanned image into a text file. OCR
  software comes standard with many scanners.

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Digital Imaging Vocabulary

• USB - A port type used by many scanners and
  digital cameras. A USB port is shaped like a
  narrow rectangle, and the camera or scanner cable
  plugs into the port.
• Ink Jet Printer - A printer that uses CMYK colors
  of ink sprayed onto paper. Ink jet printer can
  produce sophisticated looking photo output on
  special glossy paper. Color ink jet printers are
  priced for home users beginning at 70.
• Laser Printer - A printer that uses black or
  colored toner (dry powder), which is fused by
  heat onto the paper. Laser prints are smooth,
  slick, and water-safe. Color laser printer are
  priced outside the range of most home users,
  averaging 600 and up.

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Digital Imaging VocabularyPaper and Ink

• Photo Paper / Photo Ink - Specialty paper and ink
  for photographic quality output from ink jet
  printers. Photo papers are glossy or semi-gloss.
  Photo ink cartridges produce brighter, more
  colorful images.

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Digital Imaging VocabularyBytes

• Byte - The space required to store a single
  character or data.
• KB (Kilobyte) - 1,000 bytes, commonly referred
  to as K
• MB (Megabyte) - 1,000 kilobytes, commonly
  referred to as "Meg (1 million bytes)
•  
• Digital images are frequently much larger than
  text files. An average Microsoft Word text file
  is 20-30KB, while an average digital image may be
  a as large as 200-300KB for printing, and
  100-200KB for emailing.

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Digital Imaging VocabularyFiles

• File Sizes
•  
• Floppy Disk Size 1039-1044K
• Zip Disk Size 100-200MB
• CD Size 500-800MB
• File Extension - A dot and three letters at the
  end of a file name that specifies the type of
  file.