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File Formats
file formats
22
Computer Science
Undergraduate 1
10/27/2015

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Term
File Format
Definition
standard way that info is encoded for storage in a computer file. specifies how bits are used to encode information in a digital storage medium.
Term
Object Graphics
Definition
Images based on geometric objects and mathematical curves. illustrations create in illustrator are object graphics.
Term
pixel graphics
Definition
images based on pixels. divided into tiny squares of color called pixels. the quality of a pizel based graphic is dependent upon the ppi and dpi. The higher the ppi/dpi the better the quality of the image.
Term
Line Art
Definition
Images tha contain only black and white pixels. Line Art requires a high resolution so that the image doe not appear jagged due to all the pixels.
Term
bitmap
Definition
(pixmap) type of memory organization or image file formated used to store digital images. generally stored with a color depth of 1,4,8,16,24,32,48, or 64. Doesn't rescale well.
Term
EPS (Encapsulated Postscript)
Definition
A file format for digital images and illustrations. Manages both object and pixel based graphics.
Term
Tiff - Tagged Image File Format.
Definition
Common file format for digital images, can be lzw compressed.
Term
GIF graphic interchange format
Definition
A file formate primarily used on the web. a GIF is always in index color mode.
Term
JPEG Joint photographic experts group
Definition
compression method for images that also works as its own image format. comonly used method of lossy compression for digital images, produced by photography.
Term
PDF - portable document format
Definition
manages object and pixel graphics. File format can be read across all platforms on PC and Mac. independent of software, hardware, or operating systems. Can contain links and buttons, form fields, audio, video, and business logic.
Term
adobe illustrator artwork (AI)
Definition
a proprietary file formate developed by adobe for representing single page vector based drawings in either the EPS or PDF formats.
Term
photoshop document .PSD
Definition
this format stores an image with support for most imaging options available in photoshop. includes layers with masks, color spaces , icc profiles.
Term
Adobe InDesign, INDD
Definition
file extension for a page layout file used by InDesign, can also be opened using Adobe InCopy. Contains formatting, content, styles, and linked files. used to create books, magazines, newspapers, flyers, etc.
Term
QuickTime (.MOV)
Definition
File format functions as a multimedia container file tha contains one or more tracks,each ofwhich stores a particular type of data: audio, video, effects, or text.
Term
portable network graphics (PNG)
Definition
bitmapped image format that employs lossless data compression. PNG was created to improve upon and replace GIF format, as it doesnt require a patent license. Designed for transferring images on the internet, not professional graphics.
Term
EXE
Definition
common filename extension for denoting an executable file in operating systems.
Term
DOC
Definition
file extension for word processing documents, most commonly for Microsoft Word
Term
XLS
Definition
file extension for microsoft Excel.
Term
PPTX
Definition
file extension given to microsoft power point files.
Term
HTML- hyperText Markup Language
Definition
authoring language used to create documents on the web. defines the structure and layout of a web document using a variety of tags and attributes.
Term
lossless image compression
Definition
this type of compression reduces the size of an image file without reducing image quality. when the image is uncompressed, it will look exactly as it did before.
Term
Loss image compression
Definition
this type of compression removes information from the image. generally the removed information cannot be perceived by the human eye, unless the image is too compressed.
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