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41 terms

Marraccini 2.01 MaWD

STUDY
PLAY
Graphics
Anything on a page that is not actual text, from simple line drawings to fully active images
Color Depth
Refers to the number of colors per pixel that can be displayed in an image
Compression
How an image is saved in order to reduce the file size
Lossy Compression
Alters and/or eliminates some data
Lossless Compression
Reduces size without losing any pixel data
Portability
How easily you can open, modify, and view files
Transparency
The background of an image is "see through" so that the graphic can blend into the background
Raster Graphics
Also called bitmap graphics, images composed of grids of pixels that have a fixed resolution and cannot be resized without losing image quality
GIF
Graphics Interchange Format
Standard format for web animation, supports transparency, lossless compression, supports 256 colors.
JPEG
Joint Photographic Experts Group
Does not support animation, does not support transparency, high quality, larger size than GIF, lossy compression, supports 16 M colors.
BMP
Bitmap
Does not support animation or transparency, uncompressed, supports 256 colors, not well suited for transferring files across the internet or for print publications.
PNG
Portable Network Graphics
Does not support animation, supports transparency, lossless compression, supports 256 colors.
TIFF
Tagged Image File Format
Does not support animation or transparency, available in compressed and uncompressed formats; compressed is advised, supports 16 M colors.
Vector Graphics
Composed of mathematical formulas that define lines, shapes, and curves. Can be edited by moving points called nodes, can be 2D or 3D, and are edited in drawing programs. Used for architechtural
Characteristics of Vector Graphics
Can be edited by moving points called nodes
Can be 2D or 3D
Edited in drawing programs
Uses of Vector Graphics
Graphics that will be scaled or resized
Architectural drawings, CAD programs, flow charts, logos, cartoons, clip art, internet websites, fonts and specialized text effects
Advantages of Vector Graphics
Resolution independent- regardless of how much the image is enlarged or reduced, the image definiton 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, CDR, DXF, EPS, SVG, WMF
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
1. Vector graphics do not degrade in quality when scaled (resized)
2. Raster graphics become pixilated when enlarged
3. Vector graphics are easier to color than raster graphics
4. Vector file are smaller than raster files
5. Vector images can easily be converted to raster images but raster images are hard to convert to vector images.
6. Raster graphics are better for realistic images and photographs
Types of Images- Clip Art
Premade graphics that are available online and in many software packages; may be raster or vector
Types of Images- Photographs
Raster images that contain millions of colors
Types of Images- Art Work
Computer created drawing or painting; may be raster or vector
Resolution
The amount of detail stored for an image; the higher the resolution, the higher the level of detail in the image.
PPI
Pixels per inch; the number of pixels in one inch, more pixels per inch means better image quality but larger file size. Images that will be displayed on a monitor or screen have a lower resolution because most monitors or screens do not support very high resolution.
DPI
Dots per inch; the number of dots or 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 pixelation or blurriness.
Aspect Radio
Relationship of an object's width to its height
Cloning
Copying part of an image and using it to replace unwanted parts of the image
Cropping
Removing part of an image.
The original image retains the same file size.
The cropped image can be saved as a new object.
Filters
Used to apply special effects to an image
Gradients
Filling an object with a smooth transition from one color to another.
Layering
Compiling multiple pictures or objects together into one image.
Layers can be turned on or off.
Elements can be colored, layered, and resized individually.
Patterns and Textures
Patterns are raster graphics applied as a fill.
Textures are used to create filters and backgrounds.
Rotating
Pivoting an object around it's center point.
Transparency
Removing the background color of a raster image making it "see-through" in order to allow the image to blend in with its background.