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2.01
understanding raster graphics
| Term | Definition |
|---|---|
| graphics | anything on the page that isn't text |
| raster graphics | made of pixles |
| vector graphics | made of lines and shapes |
| color depth | number of colors per pixles that can be in an image |
| compression | how much of the image is saved to reduce file size |
| lossless compression | no data loss from compressing a file |
| lossy compression | the quality is lost from saving the image |
| portability | how easily you can open modify and view files using different operating systems/ softwares |
| transparency | makes part of an image see through |
| pixels | most common measurement of computer display |
| points | unit of measurement for typeface |
| picas | 1/6 of an inch used for rule of thirds |
| resolution | amount of detail that can be stored in an image |
| resolution is measured in | PPI (pixels per inch) |
| Image Output Methods | monitors, printers monitors low res, printers high res |
| color modes | mathematical model that shows percentages of colors to produce other colors |
| RGB | Uses red green and blue |
| CMYK | cyan magenta yellow black used for printing |
| raster graphics/bitmap graphics | consists of pixles and have set resolution most common for digital photographs PSD PNG JPEG TIFF GIF PDF |
| PSD Photoshop document | Industry standard for raster graphic editing, GOOD |
| GIF Graphics Interchange format | standard format for animation low quality |
| JPEG Joint Photographic Experts Group | used for publishing photographs and digital camera photographs |
| PNG portable network graphics | used for online viewing of images |
| TIFF tagged image file format | sucks stores faxes and store bitmap data |
| PDF Portable Document Format | shares files regardless of software, protected from copying |
| aspect ratio | relationship of an objects width to its height |
| cropping | cutting out part of an image |
| layers | compiling multiple pictures into one image creating layers |
| selections | identifying a specific area of a layer or image so you only mess with that part |
| transparency | removing background color from an image |
| transforming | changing a graphics size or dimensions through scaling or rotating |
| layer styles | one or more effects applied to a layer or layer group |
| Layer masks | apply transparency to a specific portion of a layer with precise control |
| fill | putting a color gradient pattern or texture into an object or area |
| gradient | filling an object with a smooth transition |
| adjustment layers | non destructive layers that are added to allow you to apply images tonal or color adjustment |
| filters | apply special effects to an image |
| cloning | using a sampled area to paint over another area |
| blend modes | change the way layers act by determining how a layer will blend with layers below it |
Created by:
allpack2
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