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Graphics Vocabulary
| Term | Definition |
|---|---|
| graphic image | a visual design or representation made using various methods and programs(ex. painting, drawing, shape, photograph) |
| pixels | small squares of color in a grid; a collection of pixels can produce an image |
| bitmap/raster image | a complex image made up of pixels that usually create realistic images or photos (created with paint programs) |
| vector graphic | drawings created by using a series of lines and curves that usually create images like clip art, cartoons. diagrams, maps, etc. and can be resized without losing clarity (created with drawing programs) |
| resolution | the clarity of an image, expressed as dots per inch (dpi) or pixels per inch (ppi); the higher the resolution, the greater the image detail |
| compression | reducing the size of an image |
| lossless | compression reduces the file size without losing any pixel information |
| lossy | compression reduces the size of an image file by removing or simplifying data that is not essential (the greater the lossy compression, the poorer the quality of the image) |
| file formats | tells the computer how to display, print, and process, and save the data; dictated by the application program which created the file, and the operating system under which it was created and stored. |
| GIF | lossy raster file format that reduces the number of colors in an image (best for web pages, small icons, etc.) |
| BMP | lossy raster file format similar to GIF |
| PNG | lossless raster file format that preserves image detail and preserves transparency (good general purpose format) |
| TIFF | lossless raster file format that preserves image detail and preserve transparency (works best for high quality printing, files are quite large) |
| JPG | raster file format commonly used for photographs and images (for low to medium resolution needs, or pictures that do not require transparency); most common digital format |
| WMF | windows meta file; used for vector graphics |
| aspect ratio | ratio of width to height; must be maintained when image is resized to avoid distortion |
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mainladyboss
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