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Terms in this set (34)
anything on a page that is not actually text, from simple lines drawings to fully active images found on the world wide web
refers to the number of colors per pixel that can be displayed in an image.
refers to how an image is saved in order to reduce the file size
no data is lost during compression
some data is lost during compression
ease at which files are opened, modified, and viewed on computers using different operating systems, software and browsers.
the background of an image is "see-through" so that the graphic can blend into the background without having a white box around it.
also called bitmap graphics; Images composed of grids of pixels that have a fixed resolution (number of pixels per inch) and cannot be resized without losing image quality; edited in paint programs
graphics interchange format; Standard format on web for animation; Supports transparency; Uses lossless compression; Supports 256 colors; Clip art, animations, icons, logos; Simple diagrams, line drawings; Graphics with large blocks of a single color; Graphics with transparent areas; Graphics displayed on computer screens
Joint photographic experts group; Does not support animation; Does not support transparency; Uses lossy compression; Supports 16 M colors; High quality; but larger file size than gif; Desktop publishing images; Photographs and natural artwork; Scanned images; Emailing photographs; Digital camera photographs
bitmap; Does not support animation or transparency; Uncompressed; Supports 256 colors; Large file size; not well suited for transfer across the Internet or print publications; Editing raster graphics; Creating icons and wallpaper
portable network graphic; Supports transparency; Uses lossless compression; Supports several different color depths; including 256 colors and 16 million colors; Replacing GIF and TIFF images; Online viewing of images
tagged image file format; Does not support animation or transparency; Available in compressed (lossless) and uncompressed formats; Supports up 16 M colors; Storing raw bitmap data by some programs and devices such as scanners; High resolution printing; Desktop publishing images; Storage container for faxes and other digital images
composed of mathematical formulas that define lines, shapes and curves; edited by moving points (nodes); 2D or 3D; edited in draw programs; graphics that will be scaled or resized; cartoon clip art; internet websites; fonts and specialized texts.
advantages of vector graphics
Resolution independent - regardless of how much the image is enlarged or reduced, the image definition and quality remain the same
Small file sizes - easily transferred over the Internet
disadvantages of vector graphics
Lower color quality than bitmap images
Not good for photographic images
common vector file formats
AI - Adobe Illustrator
CDR - Corel Draw
DXF - AutoCAD
EPS - Encapsulated Postscript (meta graphic)
SVG - Scalable Vector Graphics
WMF - Windows Metafile, common format for windows clipart
Raster vs Vector
Vector graphics do not degrade in quality when scaled (resized)
Raster graphics become pixilated when enlarged
Vector graphics are easier to color than raster graphics
Vector file are smaller than raster files
Vector images can easily be converted to raster images but raster images are hard to convert to vector images.
Raster graphics are better for realistic images and photographs
premade graphics that are available online and in many software packages; may be vector or raster
raster images that contain millions of colors
computer created drawing or painting; may be raster or vector
the amount of detail stored for an image. The higher the resolution, the higher the level of detail in the image
pixels per inch; More pixels per inch means better image quality but larger file size; Images that will be displayed on a monitor or screen can have a lower resolution because most monitors/screens do not support very high resolutions
dots per inch; The number of dots of ink or toner per inch on a printed image; The lower the DPI the less detailed the image; Images that will be printed need a higher resolution in order to print clearly without pixilation or blurriness.
relationship of an objects width to its height
copying part of an image and using it to replace unwanted parts of the image
removing part of an image
used to apply special effects to an image
filling an object with a smooth transition from one color to another
compiling multiple pictures or objects together into one image
raster graphics applied as a fill
used to create filters and backgrounds
pivoting an object around its center point
removing the background color of a raster image making it "see-through" in order to allow the image to blend in with its background
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4.02 Key Terms
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