| A | B |
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| graphics | anything on a page that is not actual text, from simple line drawings to fully active images found on the World Wide Web |
| color depth | refers to the number of colors per pixel that can be displayed in an image and affects image quality and file size |
| compression | refers to the mathematical algorithm used when an image is saved in order to reduce the file size |
| lossless | no data is lost during compression |
| lossy | some data is lost during compression |
| portability | ease at which files are opened, modified, and viewed on computers using different operating systems, software and browsers |
| transparency | the background of an image is “see-through” so that the graphic can blend into the background without having a white box around it |
| inches (in) | the standard unit of measurement for US standard size papers that can work well for print |
| pixels (px) | the most common unit of measurement used for computer screen display |
| points (pt) | the standard unit of measure for typefaces, with 1 point representing 1/72 of an inch, therefore text formatted in 72 point font should be approximately one inch with variation due to font designs |
| picas | a unit of measurement for lines of type with one pica equal to 1/6 of an inch |
| resolution | the amount of detail stored for an image |
| PPI (pixels per inch) | The number of pixels in one inch |
| on-screen resolution | monitors can display an image at a resolution of 72 ppi |
| print resolution | documents that are being sent for print should be 300 PPI to ensure image quality |
| DPI (dots per inch) | the number of dots of ink or toner per inch on a printed image |
| color mode | a mathematical model that describes the way colors can be represented as numbers or percentages, typically with three or four values |
| RGB (red, green, blue) | assigns an intensity value to each pixel that ranges from 0 to 255 for each of the red, green, and blue components in an image |
| CMYK (cyan, magenta, yellow, black) | assigns a percentage value for each of the process inks |
| raster graphics | also called bitmaps, are images composed of grids of pixels that have a fixed resolution (number of pixels per inch) and cannot be resized without losing image quality |
| native file formats | editable file formats that are proprietary to a specific program that generally lacks portability and is not meant to be used with other software |
| standard file formats | file formats that can be used with a variety of software programs |
| PSD | photoshop document |
| GIF | graphics interchange format |
| JPEG | joint photographic experts group |
| PNG | portable network graphic |
| TIFF | tagged image file format |
| aspect ratio | relationship of an object’s width to its height |
| cropping | removing a part of an image |
| layering | compiling multiple pictures or objects together into one image |
| selections | identifying a specific area of a layer or image that allows you to move or apply techniques to only that specific area on that specific layer |
| transforming | changing a graphics size or dimensions through commands such as scaling and rotating |
| scaling | enlarging or shrinking a graphic |
| rotating | pivoting an object around its center point |
| layer styles | One or more effects applied to a layer or layer group. Effects include shadows, stroke, glows, bevels, and overlays |
| layer masks | A non-destructive method which allows you to 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 from one color to another |
| adjustment layers | Non-destructive layers that can be added to allow you to apply image tonal and color adjustments |
| filters | used to apply special effects or unique transformation to an image |
| clone stamp | samples and area of an image and then allows you to paint over another area of the image with the sampled area |
| blend modes | change the way layers interact by determining how a layer will blend with the layers below it |
| 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 |
